bldc/lispBM/lispif_vesc_extensions.c

/*
	Copyright 2022 Benjamin Vedder	benjamin@vedder.se
	Copyright 2022 Joel Svensson    svenssonjoel@yahoo.se

	This file is part of the VESC firmware.

	The VESC firmware is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The VESC firmware is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "lispif.h"
#include "heap.h"
#include "symrepr.h"
#include "eval_cps.h"
#include "print.h"
#include "tokpar.h"
#include "lbm_memory.h"
#include "env.h"
#include "lispbm.h"
#include "extensions/array_extensions.h"

#include "commands.h"
#include "mc_interface.h"
#include "timeout.h"
#include "servo_dec.h"
#include "servo_simple.h"
#include "encoder/encoder.h"
#include "comm_can.h"
#include "bms.h"
#include "utils.h"
#include "hw.h"
#include "mcpwm_foc.h"
#include "imu.h"
#include "mempools.h"
#include "app.h"
#include "spi_bb.h"
#include "i2c.h"

#include <math.h>
#include <ctype.h>

// Helpers

static bool is_number_all(lbm_value *args, lbm_uint argn) {
	for (lbm_uint i = 0;i < argn;i++) {
		if (!lbm_is_number(args[i])) {
			return false;
		}
	}
	return true;
}

#define CHECK_NUMBER_ALL()			if (!is_number_all(args, argn)) {return lbm_enc_sym(SYM_EERROR);}
#define CHECK_ARGN(n)				if (argn != n) {return enc_sym(SYM_EERROR);}
#define CHECK_ARGN_NUMBER(n)		if (argn != n || !is_number_all(args, argn)) {return lbm_enc_sym(SYM_EERROR);}

// Various commands

static lbm_value ext_print(lbm_value *args, lbm_uint argn) {
	static char output[256];

	for (lbm_uint i = 0; i < argn; i ++) {
		lbm_value t = args[i];

		if (lbm_is_ptr(t) && lbm_type_of(t) == LBM_PTR_TYPE_ARRAY) {
			lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(t);
			switch (array->elt_type){
			case LBM_VAL_TYPE_CHAR:
				commands_printf_lisp("%s", (char*)array->data);
				break;
			default:
				return lbm_enc_sym(SYM_NIL);
				break;
			}
		} else if (lbm_type_of(t) == LBM_VAL_TYPE_CHAR) {
			if (lbm_dec_char(t) =='\n') {
				commands_printf_lisp(" ");
			} else {
				commands_printf_lisp("%c", lbm_dec_char(t));
			}
		}  else {
			lbm_print_value(output, 256, t);
			commands_printf_lisp("%s", output);
		}
	}

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_servo(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	servo_simple_set_output(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_reset_timeout(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	timeout_reset();
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_get_ppm(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(servodec_get_servo(0));
}

static lbm_value ext_get_encoder(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(encoder_read_deg());
}

static lbm_value ext_get_vin(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_input_voltage_filtered());
}

static lbm_value ext_select_motor(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	int i = lbm_dec_as_i(args[0]);
	if (i != 0 && i != 1 && i != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}
	mc_interface_select_motor_thread(i);
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_get_selected_motor(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_i(mc_interface_motor_now());
}

typedef struct {
	lbm_uint v_tot;
	lbm_uint v_charge;
	lbm_uint i_in;
	lbm_uint i_in_ic;
	lbm_uint ah_cnt;
	lbm_uint wh_cnt;
	lbm_uint cell_num;
	lbm_uint v_cell;
	lbm_uint bal_state;
	lbm_uint temp_adc_num;
	lbm_uint temps_adc;
	lbm_uint temp_ic;
	lbm_uint temp_hum;
	lbm_uint hum;
	lbm_uint temp_max_cell;
	lbm_uint soc;
	lbm_uint soh;
	lbm_uint can_id;
	lbm_uint ah_cnt_chg_total;
	lbm_uint wh_cnt_chg_total;
	lbm_uint ah_cnt_dis_total;
	lbm_uint wh_cnt_dis_total;
	lbm_uint msg_age;
} bms_syms;

static bms_syms syms_bms = {0};

static bool get_add_symbol(char *name, lbm_uint* id) {
	if (!lbm_get_symbol_by_name(name, id)) {
		if (!lbm_add_symbol_const(name, id)) {
			return false;
		}
	}

	return true;
}

static bool compare_symbol(lbm_uint sym, lbm_uint *comp) {
	if (*comp == 0) {
		if (comp == &syms_bms.v_tot) {
			get_add_symbol("bms-v-tot", comp);
		} else if (comp == &syms_bms.v_charge) {
			get_add_symbol("bms-v-charge", comp);
		} else if (comp == &syms_bms.i_in) {
			get_add_symbol("bms-i-in", comp);
		} else if (comp == &syms_bms.i_in_ic) {
			get_add_symbol("bms-i-in-ic", comp);
		} else if (comp == &syms_bms.ah_cnt) {
			get_add_symbol("bms-ah-cnt", comp);
		} else if (comp == &syms_bms.wh_cnt) {
			get_add_symbol("bms-wh-cnt", comp);
		} else if (comp == &syms_bms.cell_num) {
			get_add_symbol("bms-cell-num", comp);
		} else if (comp == &syms_bms.v_cell) {
			get_add_symbol("bms-v-cell", comp);
		} else if (comp == &syms_bms.bal_state) {
			get_add_symbol("bms-bal-state", comp);
		} else if (comp == &syms_bms.temp_adc_num) {
			get_add_symbol("bms-temp-adc-num", comp);
		} else if (comp == &syms_bms.temps_adc) {
			get_add_symbol("bms-temps-adc", comp);
		} else if (comp == &syms_bms.temp_ic) {
			get_add_symbol("bms-temp-ic", comp);
		} else if (comp == &syms_bms.temp_hum) {
			get_add_symbol("bms-temp-hum", comp);
		} else if (comp == &syms_bms.hum) {
			get_add_symbol("bms-hum", comp);
		} else if (comp == &syms_bms.temp_max_cell) {
			get_add_symbol("bms-temp-cell-max", comp);
		} else if (comp == &syms_bms.soc) {
			get_add_symbol("bms-soc", comp);
		} else if (comp == &syms_bms.soh) {
			get_add_symbol("bms-soh", comp);
		} else if (comp == &syms_bms.can_id) {
			get_add_symbol("bms-can-id", comp);
		} else if (comp == &syms_bms.ah_cnt_chg_total) {
			get_add_symbol("bms-ah-cnt-chg-total", comp);
		} else if (comp == &syms_bms.wh_cnt_chg_total) {
			get_add_symbol("bms-wh-cnt-chg-total", comp);
		} else if (comp == &syms_bms.ah_cnt_dis_total) {
			get_add_symbol("bms-ah-cnt-dis-total", comp);
		} else if (comp == &syms_bms.wh_cnt_dis_total) {
			get_add_symbol("bms-wh-cnt-dis-total", comp);
		} else if (comp == &syms_bms.msg_age) {
			get_add_symbol("bms-msg-age", comp);
		}
	}

	return *comp == sym;
}

static lbm_value ext_get_bms_val(lbm_value *args, lbm_uint argn) {
	lbm_value res = lbm_enc_sym(SYM_EERROR);

	if (argn != 1 && argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (lbm_type_of(args[0]) != LBM_VAL_TYPE_SYMBOL) {
		return lbm_enc_sym(SYM_EERROR);
	}

	lbm_uint name = lbm_dec_sym(args[0]);
	bms_values *val = bms_get_values();

	if (compare_symbol(name, &syms_bms.v_tot)) {
		res = lbm_enc_F(val->v_tot);
	} else if (compare_symbol(name, &syms_bms.v_charge)) {
		res = lbm_enc_F(val->v_charge);
	} else if (compare_symbol(name, &syms_bms.i_in)) {
		res = lbm_enc_F(val->i_in);
	} else if (compare_symbol(name, &syms_bms.i_in_ic)) {
		res = lbm_enc_F(val->i_in_ic);
	} else if (compare_symbol(name, &syms_bms.ah_cnt)) {
		res = lbm_enc_F(val->ah_cnt);
	} else if (compare_symbol(name, &syms_bms.wh_cnt)) {
		res = lbm_enc_F(val->wh_cnt);
	} else if (compare_symbol(name, &syms_bms.cell_num)) {
		res = lbm_enc_i(val->cell_num);
	} else if (compare_symbol(name, &syms_bms.v_cell)) {
		if (argn != 2 || !lbm_is_number(args[1])) {
			return lbm_enc_sym(SYM_EERROR);
		}

		int c = lbm_dec_as_i(args[1]);
		if (c < 0 || c >= val->cell_num) {
			return lbm_enc_sym(SYM_EERROR);
		}

		res = lbm_enc_F(val->v_cell[c]);
	} else if (compare_symbol(name, &syms_bms.bal_state)) {
		if (argn != 2 || !lbm_is_number(args[1])) {
			return lbm_enc_sym(SYM_EERROR);
		}

		int c = lbm_dec_as_i(args[1]);
		if (c < 0 || c >= val->cell_num) {
			return lbm_enc_sym(SYM_EERROR);
		}

		res = lbm_enc_i(val->bal_state[c]);
	} else if (compare_symbol(name, &syms_bms.temp_adc_num)) {
		res = lbm_enc_i(val->temp_adc_num);
	} else if (compare_symbol(name, &syms_bms.temps_adc)) {
		if (argn != 2 || !lbm_is_number(args[1])) {
			return lbm_enc_sym(SYM_EERROR);
		}

		int c = lbm_dec_as_i(args[1]);
		if (c < 0 || c >= val->temp_adc_num) {
			return lbm_enc_sym(SYM_EERROR);
		}

		res = lbm_enc_F(val->temps_adc[c]);
	} else if (compare_symbol(name, &syms_bms.temp_ic)) {
		res = lbm_enc_F(val->temp_ic);
	} else if (compare_symbol(name, &syms_bms.temp_hum)) {
		res = lbm_enc_F(val->temp_hum);
	} else if (compare_symbol(name, &syms_bms.hum)) {
		res = lbm_enc_F(val->hum);
	} else if (compare_symbol(name, &syms_bms.temp_max_cell)) {
		res = lbm_enc_F(val->temp_max_cell);
	} else if (compare_symbol(name, &syms_bms.soc)) {
		res = lbm_enc_F(val->soc);
	} else if (compare_symbol(name, &syms_bms.soh)) {
		res = lbm_enc_F(val->soh);
	} else if (compare_symbol(name, &syms_bms.can_id)) {
		res = lbm_enc_i(val->can_id);
	} else if (compare_symbol(name, &syms_bms.ah_cnt_chg_total)) {
		res = lbm_enc_F(val->ah_cnt_chg_total);
	} else if (compare_symbol(name, &syms_bms.wh_cnt_chg_total)) {
		res = lbm_enc_F(val->wh_cnt_chg_total);
	} else if (compare_symbol(name, &syms_bms.ah_cnt_dis_total)) {
		res = lbm_enc_F(val->ah_cnt_dis_total);
	} else if (compare_symbol(name, &syms_bms.wh_cnt_dis_total)) {
		res = lbm_enc_F(val->wh_cnt_dis_total);
	} else if (compare_symbol(name, &syms_bms.msg_age)) {
		res = lbm_enc_F(UTILS_AGE_S(val->update_time));
	}

	return res;
}

static lbm_value ext_get_adc(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn == 0) {
		return lbm_enc_F(ADC_VOLTS(ADC_IND_EXT));
	} else if (argn == 1) {
		lbm_int channel = lbm_dec_as_i(args[0]);
		if (channel == 0) {
			return lbm_enc_F(ADC_VOLTS(ADC_IND_EXT));
		} else if (channel == 1) {
			return lbm_enc_F(ADC_VOLTS(ADC_IND_EXT2));
		} else {
			return lbm_enc_sym(SYM_EERROR);
		}
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}
}

static lbm_value ext_systime(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_I(chVTGetSystemTimeX());
}

static lbm_value ext_secs_since(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	return lbm_enc_F(UTILS_AGE_S(lbm_dec_as_u(args[0])));
}

static lbm_value ext_set_aux(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);

	int port = lbm_dec_as_u(args[0]);
	bool on = lbm_dec_as_u(args[1]);
	if (port == 1) {
		if (on) {
			AUX_ON();
		} else {
			AUX_OFF();
		}
		return lbm_enc_sym(SYM_TRUE);
	} else if (port == 2) {
		if (on) {
			AUX2_ON();
		} else {
			AUX2_OFF();
		}
		return lbm_enc_sym(SYM_TRUE);
	}

	return lbm_enc_sym(SYM_EERROR);
}

static lbm_value ext_get_imu_rpy(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float rpy[3];
	imu_get_rpy(rpy);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(rpy[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(rpy[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(rpy[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_quat(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float q[4];
	imu_get_quaternions(q);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(q[3]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(q[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(q[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(q[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_acc(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float acc[3];
	imu_get_accel(acc);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(acc[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(acc[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(acc[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_gyro(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float gyro[3];
	imu_get_gyro(gyro);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(gyro[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(gyro[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(gyro[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_mag(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float mag[3];
	imu_get_mag(mag);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(mag[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(mag[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(mag[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_acc_derot(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float acc[3];
	imu_get_accel_derotated(acc);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(acc[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(acc[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(acc[0]), imu_data);

	return imu_data;
}

static lbm_value ext_get_imu_gyro_derot(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float gyro[3];
	imu_get_gyro_derotated(gyro);

	lbm_value imu_data = lbm_enc_sym(SYM_NIL);
	imu_data = lbm_cons(lbm_enc_F(gyro[2]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(gyro[1]), imu_data);
	imu_data = lbm_cons(lbm_enc_F(gyro[0]), imu_data);

	return imu_data;
}

static lbm_value ext_send_data(lbm_value *args, lbm_uint argn) {
	if (argn != 1 || (lbm_type_of(args[0]) != LBM_PTR_TYPE_CONS && lbm_type_of(args[0]) != LBM_PTR_TYPE_ARRAY)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	lbm_value curr = args[0];
	const int max_len = 20;
	uint8_t to_send[max_len];
	uint8_t *to_send_ptr = to_send;
	int ind = 0;

	if (lbm_type_of(args[0]) == LBM_PTR_TYPE_ARRAY) {
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[0]);
		if (array->elt_type != LBM_VAL_TYPE_BYTE) {
			return lbm_enc_sym(SYM_EERROR);
		}

		to_send_ptr = (uint8_t*)array->data;
		ind = array->size;
	} else {
		while (lbm_type_of(curr) == LBM_PTR_TYPE_CONS) {
			lbm_value  arg = lbm_car(curr);

			if (lbm_is_number(arg)) {
				to_send[ind++] = lbm_dec_as_u(arg);
			} else {
				return lbm_enc_sym(SYM_EERROR);
			}

			if (ind == max_len) {
				break;
			}

			curr = lbm_cdr(curr);
		}
	}

	commands_send_app_data(to_send_ptr, ind);

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_get_remote_state(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	float gyro[3];
	imu_get_gyro_derotated(gyro);

	lbm_value state = lbm_enc_sym(SYM_NIL);
	state = lbm_cons(lbm_enc_i(app_nunchuk_get_is_rev()), state);
	state = lbm_cons(lbm_enc_i(app_nunchuk_get_bt_z()), state);
	state = lbm_cons(lbm_enc_i(app_nunchuk_get_bt_c()), state);
	state = lbm_cons(lbm_enc_F(app_nunchuk_get_decoded_x()), state);
	state = lbm_cons(lbm_enc_F(app_nunchuk_get_decoded_y()), state);

	return state;
}

static bool check_eeprom_addr(int addr) {
	if (addr < 0 || addr > 63) {
		lbm_set_error_reason("Address must be 0 to 63");
		return false;
	}

	return true;
}

static lbm_value ext_eeprom_store_f(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);

	int addr = lbm_dec_as_i(args[0]);
	if (!check_eeprom_addr(addr)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	eeprom_var v;
	v.as_float = lbm_dec_as_f(args[1]);
	return lbm_enc_i(conf_general_store_eeprom_var_custom(&v, addr));
}

static lbm_value ext_eeprom_read_f(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);

	int addr = lbm_dec_as_i(args[0]);
	if (!check_eeprom_addr(addr)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	eeprom_var v;
	bool res = conf_general_read_eeprom_var_custom(&v, addr);
	return res ? lbm_enc_F(v.as_float) : lbm_enc_sym(SYM_NIL);
}

static lbm_value ext_eeprom_store_i(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);

	int addr = lbm_dec_as_i(args[0]);
	if (!check_eeprom_addr(addr)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	eeprom_var v;
	v.as_i32 = lbm_dec_as_f(args[1]);
	return lbm_enc_i(conf_general_store_eeprom_var_custom(&v, addr));
}

static lbm_value ext_eeprom_read_i(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);

	int addr = lbm_dec_as_i(args[0]);
	if (!check_eeprom_addr(addr)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	eeprom_var v;
	bool res = conf_general_read_eeprom_var_custom(&v, addr);
	return res ? lbm_enc_I(v.as_i32) : lbm_enc_sym(SYM_NIL);
}

// Motor set commands

static lbm_value ext_set_current(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_current(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_current_rel(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_current_rel(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_duty(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_duty(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_brake(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_brake_current(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_brake_rel(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_brake_current_rel(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_handbrake(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_handbrake(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_handbrake_rel(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_handbrake_rel(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_rpm(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_pid_speed(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_set_pos(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	timeout_reset();
	mc_interface_set_pid_pos(lbm_dec_as_f(args[0]));
	return lbm_enc_sym(SYM_TRUE);
}

// Motor get commands

static lbm_value ext_get_current(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_tot_current_filtered());
}

static lbm_value ext_get_current_dir(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_tot_current_directional_filtered());
}

static lbm_value ext_get_current_in(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_tot_current_in_filtered());
}

static lbm_value ext_get_duty(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_duty_cycle_now());
}

static lbm_value ext_get_rpm(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_rpm());
}

static lbm_value ext_get_temp_fet(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_temp_fet_filtered());
}

static lbm_value ext_get_temp_mot(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_temp_motor_filtered());
}

static lbm_value ext_get_speed(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_speed());
}

static lbm_value ext_get_dist(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_distance());
}

static lbm_value ext_get_batt(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mc_interface_get_battery_level(0));
}

static lbm_value ext_get_fault(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_i(mc_interface_get_fault());
}

// CAN-commands

static lbm_value ext_can_current(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn == 2) {
		comm_can_set_current(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	} else if (argn == 3) {
		comm_can_set_current_off_delay(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]), lbm_dec_as_f(args[2]));
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_current_rel(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn == 2) {
		comm_can_set_current_rel(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	} else if (argn == 3) {
		comm_can_set_current_rel_off_delay(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]), lbm_dec_as_f(args[2]));
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_duty(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);
	comm_can_set_duty(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_brake(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);
	comm_can_set_current_brake(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_brake_rel(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);
	comm_can_set_current_brake_rel(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_rpm(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);
	comm_can_set_rpm(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_pos(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2);
	comm_can_set_pos(lbm_dec_as_i(args[0]), lbm_dec_as_f(args[1]));
	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_get_current(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg *stat0 = comm_can_get_status_msg_id(lbm_dec_as_i(args[0]));
	if (stat0) {
		return lbm_enc_F(stat0->current);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_current_dir(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg *stat0 = comm_can_get_status_msg_id(lbm_dec_as_i(args[0]));
	if (stat0) {
		return lbm_enc_F(stat0->current * SIGN(stat0->duty));
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_current_in(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg_4 *stat4 = comm_can_get_status_msg_4_id(lbm_dec_as_i(args[0]));
	if (stat4) {
		return lbm_enc_F((float)stat4->current_in);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_duty(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg *stat0 = comm_can_get_status_msg_id(lbm_dec_as_i(args[0]));
	if (stat0) {
		return lbm_enc_F(stat0->duty);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_rpm(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg *stat0 = comm_can_get_status_msg_id(lbm_dec_as_i(args[0]));
	if (stat0) {
		return lbm_enc_F(stat0->rpm);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_temp_fet(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg_4 *stat4 = comm_can_get_status_msg_4_id(lbm_dec_as_i(args[0]));
	if (stat4) {
		return lbm_enc_F((float)stat4->temp_fet);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_temp_motor(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg_4 *stat4 = comm_can_get_status_msg_4_id(lbm_dec_as_i(args[0]));
	if (stat4) {
		return lbm_enc_F((float)stat4->temp_motor);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_speed(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg *stat0 = comm_can_get_status_msg_id(lbm_dec_as_i(args[0]));
	if (stat0) {
		const volatile mc_configuration *conf = mc_interface_get_configuration();
		const float rpm = stat0->rpm / (conf->si_motor_poles / 2.0);
		return lbm_enc_F((rpm / 60.0) * conf->si_wheel_diameter * M_PI / conf->si_gear_ratio);
	} else {
		return lbm_enc_F(0.0);
	}
}

static lbm_value ext_can_get_dist(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);
	can_status_msg_5 *stat5 = comm_can_get_status_msg_5_id(lbm_dec_as_i(args[0]));
	if (stat5) {
		const volatile mc_configuration *conf = mc_interface_get_configuration();
		const float tacho_scale = (conf->si_wheel_diameter * M_PI) / (3.0 * conf->si_motor_poles * conf->si_gear_ratio);
		return lbm_enc_F((float)stat5->tacho_value * tacho_scale);
	} else {
		return lbm_enc_F(0.0);
	}
}

static int cmp_int (const void * a, const void * b) {
	return ( *(int*)a - *(int*)b );
}

static lbm_value ext_can_list_devs(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	int dev_num = 0;
	can_status_msg *msg = comm_can_get_status_msg_index(dev_num);

	while (msg && msg->id >= 0) {
		dev_num++;
		msg = comm_can_get_status_msg_index(dev_num);
	}

	int devs[dev_num];

	for (int i = 0;i < dev_num;i++) {
		msg = comm_can_get_status_msg_index(i);
		if (msg) {
			devs[i] = msg->id;
		} else {
			devs[i] = -1;
		}
	}

	qsort(devs, dev_num, sizeof(int), cmp_int);
	lbm_value dev_list = lbm_enc_sym(SYM_NIL);

	for (int i = (dev_num - 1);i >= 0;i--) {
		if (devs[i] >= 0) {
			dev_list = lbm_cons(lbm_enc_i(devs[i]), dev_list);
		} else {
			break;
		}
	}

	return dev_list;
}

static lbm_value ext_can_scan(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	lbm_value dev_list = lbm_enc_sym(SYM_NIL);

	for (int i = 253;i >= 0;i--) {
		if (comm_can_ping(i, 0)) {
			dev_list = lbm_cons(lbm_enc_i(i), dev_list);
		}
	}

	return dev_list;
}

static lbm_value ext_can_send(lbm_value *args, lbm_uint argn, bool is_eid) {
	if (argn != 2 || !lbm_is_number(args[0])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	lbm_value curr = args[1];
	uint8_t to_send[8];
	int ind = 0;

	if (lbm_type_of(args[0]) == LBM_PTR_TYPE_ARRAY) {
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[0]);
		if (array->elt_type != LBM_VAL_TYPE_BYTE) {
			return lbm_enc_sym(SYM_EERROR);
		}

		ind = array->size;
		if (ind > 8) {
			ind = 0;
		}

		memcpy(to_send, array->data, ind);
	} else {
		while (lbm_type_of(curr) == LBM_PTR_TYPE_CONS) {
			lbm_value  arg = lbm_car(curr);

			if (lbm_is_number(arg)) {
				to_send[ind++] = lbm_dec_as_u(arg);
			} else {
				return lbm_enc_sym(SYM_EERROR);
			}

			if (ind == 8) {
				break;
			}

			curr = lbm_cdr(curr);
		}
	}

	if (is_eid) {
		comm_can_transmit_eid(lbm_dec_as_u(args[0]), to_send, ind);
	} else {
		comm_can_transmit_sid(lbm_dec_as_u(args[0]), to_send, ind);
	}

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_can_send_sid(lbm_value *args, lbm_uint argn) {
	return ext_can_send(args, argn, false);
}

static lbm_value ext_can_send_eid(lbm_value *args, lbm_uint argn) {
	return ext_can_send(args, argn, true);
}

// Math

static lbm_value ext_sin(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(sinf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_cos(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(cosf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_tan(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(tanf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_asin(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(asinf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_acos(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(acosf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_atan(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(atanf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_atan2(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2)
	return lbm_enc_F(atan2f(lbm_dec_as_f(args[0]), lbm_dec_as_f(args[1])));
}

static lbm_value ext_pow(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(2)
	return lbm_enc_F(powf(lbm_dec_as_f(args[0]), lbm_dec_as_f(args[1])));
}

static lbm_value ext_sqrt(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(sqrtf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_log(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(logf(lbm_dec_as_f(args[0])));
}

static lbm_value ext_log10(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1)
	return lbm_enc_F(log10f(lbm_dec_as_f(args[0])));
}

static lbm_value ext_deg2rad(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn == 1) {
		return lbm_enc_F(DEG2RAD_f(lbm_dec_as_f(args[0])));
	} else {
		lbm_value out_list = lbm_enc_sym(SYM_NIL);
		for (int i = (argn - 1);i >= 0;i--) {
			out_list = lbm_cons(lbm_enc_F(DEG2RAD_f(lbm_dec_as_f(args[i]))), out_list);
		}
		return out_list;
	}
}

static lbm_value ext_rad2deg(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn == 1) {
		return lbm_enc_F(RAD2DEG_f(lbm_dec_as_f(args[0])));
	} else {
		lbm_value out_list = lbm_enc_sym(SYM_NIL);
		for (int i = (argn - 1);i >= 0;i--) {
			out_list = lbm_cons(lbm_enc_F(RAD2DEG_f(lbm_dec_as_f(args[i]))), out_list);
		}
		return out_list;
	}
}

static lbm_value ext_vec3_rot(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();
	if (argn != 6 && argn != 7) {
		return lbm_enc_sym(SYM_EERROR);
	}

	float input[] = {lbm_dec_as_f(args[0]), lbm_dec_as_f(args[1]), lbm_dec_as_f(args[2])};
	float rotation[] = {lbm_dec_as_f(args[3]), lbm_dec_as_f(args[4]), lbm_dec_as_f(args[5])};
	float output[3];

	bool reverse = false;
	if (argn == 7) {
		reverse = lbm_dec_as_i(args[6]);
	}

	utils_rotate_vector3(input, rotation, output, reverse);

	lbm_value out_list = lbm_enc_sym(SYM_NIL);
	out_list = lbm_cons(lbm_enc_F(output[2]), out_list);
	out_list = lbm_cons(lbm_enc_F(output[1]), out_list);
	out_list = lbm_cons(lbm_enc_F(output[0]), out_list);

	return out_list;
}

// Bit operations

/*
 * args[0]: Initial value
 * args[1]: Offset in initial value to modify
 * args[2]: Value to modify with
 * args[3]: Size in bits of value to modify with
 */
static lbm_value ext_bits_enc_int(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(4)
	uint32_t initial = lbm_dec_as_i(args[0]);
	uint32_t offset = lbm_dec_as_i(args[1]);
	uint32_t number = lbm_dec_as_i(args[2]);
	uint32_t bits = lbm_dec_as_i(args[3]);
	initial &= ~((0xFFFFFFFF >> (32 - bits)) << offset);
	initial |= (number << (32 - bits)) >> (32 - bits - offset);

	if (initial > ((1 << 27) - 1)) {
		return lbm_enc_I(initial);
	} else {
		return lbm_enc_i(initial);
	}
}

/*
 * args[0]: Value
 * args[1]: Offset in initial value to get
 * args[2]: Size in bits of value to get
 */
static lbm_value ext_bits_dec_int(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(3)
	uint32_t val = lbm_dec_as_i(args[0]);
	uint32_t offset = lbm_dec_as_i(args[1]);
	uint32_t bits = lbm_dec_as_i(args[2]);
	val >>= offset;
	val &= 0xFFFFFFFF >> (32 - bits);

	if (val > ((1 << 27) - 1)) {
		return lbm_enc_I(val);
	} else {
		return lbm_enc_i(val);
	}
}

// Events that will be sent to lisp if a handler is registered

static volatile bool event_handler_registered = false;
static volatile bool event_can_sid_en = false;
static volatile bool event_can_eid_en = false;
static volatile bool event_data_rx_en = false;
static lbm_uint event_handler_pid;
static lbm_uint sym_event_can_sid;
static lbm_uint sym_event_can_eid;
static lbm_uint sym_event_data_rx;

static lbm_value ext_enable_event(lbm_value *args, lbm_uint argn) {
	if (argn != 1 && argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (argn == 2 && !lbm_is_number(args[1])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	bool en = true;
	if (argn == 2 && !lbm_dec_as_i(args[1])) {
		en = false;
	}

	lbm_uint name = lbm_dec_sym(args[0]);

	if (name == sym_event_can_sid) {
		event_can_sid_en = en;
	} else if (name == sym_event_can_eid) {
		event_can_eid_en = en;
	} else if (name == sym_event_data_rx) {
		event_data_rx_en = en;
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_register_event_handler(lbm_value *args, lbm_uint argn) {
	if (argn != 1 || !lbm_is_number(args[0])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	event_handler_pid = lbm_dec_i(args[0]);
	event_handler_registered = true;

	return lbm_enc_sym(SYM_TRUE);
}

/*
 * args[0]: Motor, 1 or 2
 * args[1]: Phase, 1, 2 or 3
 * args[2]: Use raw ADC values. Optional argument.
 */
static lbm_value ext_raw_adc_current(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn != 2 && argn != 3) {
		return lbm_enc_sym(SYM_EERROR);
	}

	uint32_t motor = lbm_dec_as_i(args[0]);
	uint32_t phase = lbm_dec_as_i(args[1]);

	volatile float ofs1, ofs2, ofs3;
	mcpwm_foc_get_current_offsets(&ofs1, &ofs2, &ofs3, motor == 2);
	float scale = FAC_CURRENT;

	if (argn == 3 && lbm_dec_as_i(args[2]) != 0) {
		scale = 1.0;
		ofs1 = 0.0; ofs2 = 0.0; ofs3 = 0.0;
	}

	if (motor == 1) {
		switch(phase) {
		case 1: return lbm_enc_F(((float)GET_CURRENT1() - ofs1) * scale);
		case 2: return lbm_enc_F(((float)GET_CURRENT2() - ofs2) * scale);
		case 3: return lbm_enc_F(((float)GET_CURRENT3() - ofs3) * scale);
		default: return lbm_enc_sym(SYM_EERROR);
		}
	} else if (motor == 2) {
#ifdef HW_HAS_DUAL_MOTORS
		switch(phase) {
		case 1: return lbm_enc_F(((float)GET_CURRENT1_M2() - ofs1) * scale);
		case 2: return lbm_enc_F(((float)GET_CURRENT2_M2() - ofs2) * scale);
		case 3: return lbm_enc_F(((float)GET_CURRENT3_M2() - ofs3) * scale);
		default: return lbm_enc_sym(SYM_EERROR);
		}
#else
		return lbm_enc_sym(SYM_EERROR);
#endif
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}
}

/*
 * args[0]: Motor, 1 or 2
 * args[1]: Phase, 1, 2 or 3
 * args[2]: Use raw ADC values. Optional argument.
 */
static lbm_value ext_raw_adc_voltage(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn != 2 && argn != 3) {
		return lbm_enc_sym(SYM_EERROR);
	}

	uint32_t motor = lbm_dec_as_i(args[0]);
	uint32_t phase = lbm_dec_as_i(args[1]);

	float ofs1, ofs2, ofs3;
	mcpwm_foc_get_voltage_offsets(&ofs1, &ofs2, &ofs3, motor == 2);
	float scale = ((VIN_R1 + VIN_R2) / VIN_R2) * ADC_VOLTS_PH_FACTOR;

	if (argn == 3 && lbm_dec_as_i(args[2]) != 0) {
		scale = 4095.0 / V_REG;
		ofs1 = 0.0; ofs2 = 0.0; ofs3 = 0.0;
	}

	float Va = 0.0, Vb = 0.0, Vc = 0.0;
	if (motor == 2) {
#ifdef HW_HAS_DUAL_MOTORS
		Va = (ADC_VOLTS(ADC_IND_SENS4) - ofs1) * scale;
		Vb = (ADC_VOLTS(ADC_IND_SENS5) - ofs2) * scale;
		Vc = (ADC_VOLTS(ADC_IND_SENS6) - ofs3) * scale;
#else
		return lbm_enc_sym(SYM_EERROR);
#endif
	} else if (motor == 1) {
		Va = (ADC_VOLTS(ADC_IND_SENS1) - ofs1) * scale;
		Vb = (ADC_VOLTS(ADC_IND_SENS2) - ofs2) * scale;
		Vc = (ADC_VOLTS(ADC_IND_SENS3) - ofs3) * scale;
	} else {
		return lbm_enc_sym(SYM_EERROR);
	}

	switch(phase) {
	case 1: return lbm_enc_F(Va);
	case 2: return lbm_enc_F(Vb);
	case 3: return lbm_enc_F(Vc);
	default: return lbm_enc_sym(SYM_EERROR);
	}
}

static lbm_value ext_raw_mod_alpha(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mcpwm_foc_get_mod_alpha_raw());
}

static lbm_value ext_raw_mod_beta(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mcpwm_foc_get_mod_beta_raw());
}

static lbm_value ext_raw_mod_alpha_measured(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mcpwm_foc_get_mod_alpha_measured());
}

static lbm_value ext_raw_mod_beta_measured(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;
	return lbm_enc_F(mcpwm_foc_get_mod_beta_measured());
}

static lbm_value ext_raw_hall(lbm_value *args, lbm_uint argn) {
	CHECK_NUMBER_ALL();

	if (argn != 1 && argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	int motor = lbm_dec_i(args[0]);
	int samples = mc_interface_get_configuration()->m_hall_extra_samples;

	if (argn == 2) {
		lbm_dec_i(args[1]);
	}

	if ((motor != 1 && motor != 2) || samples < 0 || samples > 20) {
		return lbm_enc_sym(SYM_EERROR);
	}

	int hall = utils_read_hall(motor == 2, samples);

	lbm_value hall_list = lbm_enc_sym(SYM_NIL);
	hall_list = lbm_cons(lbm_enc_i((hall >> 2) & 1), hall_list);
	hall_list = lbm_cons(lbm_enc_i((hall >> 1) & 1), hall_list);
	hall_list = lbm_cons(lbm_enc_i((hall >> 0) & 1), hall_list);

	return hall_list;
}

// UART
static SerialConfig uart_cfg = {
		2500000,
		0,
		USART_CR2_LINEN,
		0
};
static bool uart_started = false;

static lbm_value ext_uart_start(lbm_value *args, lbm_uint argn) {
	CHECK_ARGN_NUMBER(1);

	int baud = lbm_dec_as_i(args[0]);

	if (baud < 10 || baud > 10000000) {
		return lbm_enc_sym(SYM_EERROR);
	}

	app_configuration *appconf = mempools_alloc_appconf();
	conf_general_read_app_configuration(appconf);
	if (appconf->app_to_use == APP_UART ||
			appconf->app_to_use == APP_PPM_UART ||
			appconf->app_to_use == APP_ADC_UART) {
		appconf->app_to_use = APP_NONE;
		conf_general_store_app_configuration(appconf);
		app_set_configuration(appconf);
	}
	mempools_free_appconf(appconf);

	uart_cfg.speed = baud;

	sdStop(&HW_UART_DEV);
	sdStart(&HW_UART_DEV, &uart_cfg);
	palSetPadMode(HW_UART_RX_PORT, HW_UART_RX_PIN, PAL_MODE_ALTERNATE(HW_UART_GPIO_AF));
	palSetPadMode(HW_UART_TX_PORT, HW_UART_TX_PIN, PAL_MODE_ALTERNATE(HW_UART_GPIO_AF));

	uart_started = true;

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_uart_write(lbm_value *args, lbm_uint argn) {
	if (argn != 1 || (lbm_type_of(args[0]) != LBM_PTR_TYPE_CONS && lbm_type_of(args[0]) != LBM_PTR_TYPE_ARRAY)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (!uart_started) {
		return lbm_enc_sym(SYM_EERROR);
	}

	const int max_len = 20;
	uint8_t to_send[max_len];
	uint8_t *to_send_ptr = to_send;
	int ind = 0;

	if (lbm_type_of(args[0]) == LBM_PTR_TYPE_ARRAY) {
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[0]);
		if (array->elt_type != LBM_VAL_TYPE_BYTE) {
			return lbm_enc_sym(SYM_EERROR);
		}

		to_send_ptr = (uint8_t*)array->data;
		ind = array->size;
	} else {
		lbm_value curr = args[0];
		while (lbm_type_of(curr) == LBM_PTR_TYPE_CONS) {
			lbm_value  arg = lbm_car(curr);

			if (lbm_is_number(arg)) {
				to_send[ind++] = lbm_dec_as_u(arg);
			} else {
				return lbm_enc_sym(SYM_EERROR);
			}

			if (ind == max_len) {
				break;
			}

			curr = lbm_cdr(curr);
		}
	}

	sdWrite(&HW_UART_DEV, to_send_ptr, ind);

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_uart_read(lbm_value *args, lbm_uint argn) {
	if ((argn != 2 && argn != 3 && argn != 4) ||
			lbm_type_of(args[0]) != LBM_PTR_TYPE_ARRAY || !lbm_is_number(args[1])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	unsigned int num = lbm_dec_as_u(args[1]);
	if (num > 512) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (num == 0 || !uart_started) {
		return lbm_enc_i(0);
	}

	unsigned int offset = 0;
	if (argn >= 3) {
		if (!lbm_is_number(args[2])) {
			return lbm_enc_sym(SYM_EERROR);
		}
		offset = lbm_dec_as_u(args[2]);
	}

	int stop_at = -1;
	if (argn >= 4) {
		if (!lbm_is_number(args[3])) {
			return lbm_enc_sym(SYM_EERROR);
		}
		stop_at = lbm_dec_as_u(args[3]);
	}

	lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[0]);
	if (array->elt_type != LBM_VAL_TYPE_BYTE || array->size < (num + offset)) {
		return lbm_enc_sym(SYM_EERROR);
	}

	unsigned int count = 0;
	msg_t res = sdGetTimeout(&HW_UART_DEV, TIME_IMMEDIATE);
	while (res != MSG_TIMEOUT) {
		((uint8_t*)array->data)[offset + count] = (uint8_t)res;
		count++;
		if (res == stop_at || count >= num) {
			break;
		}
		res = sdGetTimeout(&HW_UART_DEV, TIME_IMMEDIATE);
	}

	return lbm_enc_i(count);
}

static i2c_bb_state i2c_cfg = {
		HW_UART_RX_PORT, HW_UART_RX_PIN,
		HW_UART_TX_PORT, HW_UART_TX_PIN,
		0,
		0,
		{{NULL, NULL}, NULL, NULL}
};
static bool i2c_started = false;

static lbm_value ext_i2c_start(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	app_configuration *appconf = mempools_alloc_appconf();
	conf_general_read_app_configuration(appconf);
	if (appconf->app_to_use == APP_UART ||
			appconf->app_to_use == APP_PPM_UART ||
			appconf->app_to_use == APP_ADC_UART) {
		appconf->app_to_use = APP_NONE;
		conf_general_store_app_configuration(appconf);
		app_set_configuration(appconf);
	}
	mempools_free_appconf(appconf);

	i2c_bb_init(&i2c_cfg);
	i2c_started = true;

	return lbm_enc_sym(SYM_TRUE);
}

static lbm_value ext_i2c_tx_rx(lbm_value *args, lbm_uint argn) {
	if (argn != 2 && argn != 3) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (!i2c_started) {
		return lbm_enc_i(0);
	}

	uint16_t addr = 0;
	size_t txlen = 0;
	size_t rxlen = 0;
	uint8_t *txbuf = 0;
	uint8_t *rxbuf = 0;

	const unsigned int max_len = 20;
	uint8_t to_send[max_len];

	if (!lbm_is_number(args[0])) {
		return lbm_enc_sym(SYM_EERROR);
	}
	addr = lbm_dec_as_u(args[0]);

	if (lbm_type_of(args[1]) == LBM_PTR_TYPE_ARRAY) {
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[1]);
		if (array->elt_type != LBM_VAL_TYPE_BYTE) {
			return lbm_enc_sym(SYM_EERROR);
		}

		txbuf = (uint8_t*)array->data;
		txlen = array->size;
	} else {
		lbm_value curr = args[1];
		while (lbm_type_of(curr) == LBM_PTR_TYPE_CONS) {
			lbm_value  arg = lbm_car(curr);

			if (lbm_is_number(arg)) {
				to_send[txlen++] = lbm_dec_as_u(arg);
			} else {
				return lbm_enc_sym(SYM_EERROR);
			}

			if (txlen == max_len) {
				break;
			}

			curr = lbm_cdr(curr);
		}

		if (txlen > 0) {
			txbuf = to_send;
		}
	}

	if (argn >= 3 && lbm_type_of(args[2]) == LBM_PTR_TYPE_ARRAY) {
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(args[2]);
		if (array->elt_type != LBM_VAL_TYPE_BYTE) {
			return lbm_enc_sym(SYM_EERROR);
		}

		rxbuf = (uint8_t*)array->data;
		rxlen = array->size;
	}

	return lbm_enc_i(i2c_bb_tx_rx(&i2c_cfg, addr, txbuf, txlen, rxbuf, rxlen) ? 1 : 0);
}

static lbm_value ext_i2c_restore(lbm_value *args, lbm_uint argn) {
	(void)args; (void)argn;

	if (!i2c_started) {
		return lbm_enc_i(0);
	}

	i2c_bb_restore_bus(&i2c_cfg);

	return lbm_enc_i(1);
}

static lbm_value ext_str_from_n(lbm_value *args, lbm_uint argn) {
	if ((argn != 1 && argn != 2) || !lbm_is_number(args[0])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	if (argn == 2 && lbm_type_of(args[1]) != LBM_PTR_TYPE_ARRAY) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *format = 0;
	if (argn == 2) {
		format = lbm_dec_str(args[1]);
	}

	char buffer[100];
	size_t len = 0;

	switch (lbm_type_of(args[0])) {
	case LBM_PTR_TYPE_BOXED_F:
		if (!format) {
			format = "%f";
		}
		len = snprintf(buffer, sizeof(buffer), format, (double)lbm_dec_as_f(args[0]));
		break;

	default:
		if (!format) {
			format = "%d";
		}
		len = snprintf(buffer, sizeof(buffer), format, lbm_dec_as_i(args[0]));
		break;
	}

	if (len > sizeof(buffer)) {
		len = sizeof(buffer);
	}

	lbm_value res;
	if (lbm_create_array(&res, LBM_VAL_TYPE_CHAR, len + 1)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(res);
		memcpy(arr->data, buffer, len);
		((char*)(arr->data))[len] = '\0';
		return res;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}
}

static lbm_value ext_str_merge(lbm_value *args, lbm_uint argn) {
	int len_tot = 0;
	for (unsigned int i = 0;i < argn;i++) {
		char *str = lbm_dec_str(args[i]);
		if (str) {
			len_tot += strlen(str);
		} else {
			return lbm_enc_sym(SYM_EERROR);
		}
	}

	lbm_value res;
	if (lbm_create_array(&res, LBM_VAL_TYPE_CHAR, len_tot + 1)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(res);
		unsigned int offset = 0;
		for (unsigned int i = 0;i < argn;i++) {
			offset += sprintf((char*)arr->data + offset, "%s", lbm_dec_str(args[i]));
		}
		((char*)(arr->data))[len_tot] = '\0';
		return res;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}
}

static lbm_value ext_str_to_i(lbm_value *args, lbm_uint argn) {
	if (argn != 1 && argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str = lbm_dec_str(args[0]);
	if (!str) {
		return lbm_enc_sym(SYM_EERROR);
	}

	int base = 0;
	if (argn == 2) {
		if (!lbm_is_number(args[1])) {
			return lbm_enc_sym(SYM_EERROR);
		}

		base = lbm_dec_as_u(args[1]);
	}

	return lbm_enc_I(strtol(str, NULL, base));
}

static lbm_value ext_str_to_f(lbm_value *args, lbm_uint argn) {
	if (argn != 1) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str = lbm_dec_str(args[0]);
	if (!str) {
		return lbm_enc_sym(SYM_EERROR);
	}

	return lbm_enc_F(strtof(str, NULL));
}

static lbm_value ext_str_part(lbm_value *args, lbm_uint argn) {
	if ((argn != 2 && argn != 3) || !lbm_is_number(args[1])) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str = lbm_dec_str(args[0]);
	if (!str) {
		return lbm_enc_sym(SYM_EERROR);
	}

	size_t len = strlen(str);

	unsigned int start = lbm_dec_as_u(args[1]);

	if (start >= len) {
		return lbm_enc_sym(SYM_EERROR);
	}

	unsigned int n = len - start;
	if (argn == 3) {
		if (!lbm_is_number(args[2])) {
			return lbm_enc_sym(SYM_EERROR);
		}

		n = MIN(lbm_dec_as_u(args[2]), n);
	}

	lbm_value res;
	if (lbm_create_array(&res, LBM_VAL_TYPE_CHAR, n + 1)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(res);
		memcpy(arr->data, str + start, n);
		((char*)(arr->data))[n] = '\0';
		return res;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}
}

static lbm_value ext_str_split(lbm_value *args, lbm_uint argn) {
	if (argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str = lbm_dec_str(args[0]);
	if (!str) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *split = lbm_dec_str(args[1]);
	int step = 0;
	if (!split) {
		if (lbm_is_number(args[1])) {
			step = MAX(lbm_dec_as_i(args[1]), 1);
		} else {
			return lbm_enc_sym(SYM_EERROR);
		}
	}

	if (step > 0) {
		lbm_value res = lbm_enc_sym(SYM_NIL);
		int len = strlen(str);
		for (int i = len / step;i >= 0;i--) {
			int ind_now = i * step;
			if (ind_now >= len) {
				continue;
			}

			int step_now = step;
			while ((ind_now + step_now) > len) {
				step_now--;
			}

			lbm_value tok;
			if (lbm_create_array(&tok, LBM_VAL_TYPE_CHAR, step_now + 1)) {
				lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(tok);
				memcpy(arr->data, str + ind_now, step_now);
				((char*)(arr->data))[step_now] = '\0';
				res = lbm_cons(tok, res);
			} else {
				return lbm_enc_sym(SYM_MERROR);
			}
		}

		return res;
	} else {
		lbm_value res = lbm_enc_sym(SYM_NIL);
		const char *s = str;
		while (*(s += strspn(s, split)) != '\0') {
			size_t len = strcspn(s, split);

			lbm_value tok;
			if (lbm_create_array(&tok, LBM_VAL_TYPE_CHAR, len + 1)) {
				lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(tok);
				memcpy(arr->data, s, len);
				((char*)(arr->data))[len] = '\0';
				res = lbm_cons(tok, res);
			} else {
				return lbm_enc_sym(SYM_MERROR);
			}

			s += len;
		}

		return lbm_list_destructive_reverse(res);
	}
}

static lbm_value ext_str_replace(lbm_value *args, lbm_uint argn) {
	if (argn != 2 && argn != 3) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *orig = lbm_dec_str(args[0]);
	if (!orig) {
		return lbm_enc_sym(SYM_TERROR);
	}

	char *rep = lbm_dec_str(args[1]);
	if (!rep) {
		return lbm_enc_sym(SYM_TERROR);
	}

	char *with = "";
	if (argn == 3) {
		with = lbm_dec_str(args[2]);
		if (!with) {
			return lbm_enc_sym(SYM_TERROR);
		}
	}

	// See https://stackoverflow.com/questions/779875/what-function-is-to-replace-a-substring-from-a-string-in-c
	char *result; // the return string
	char *ins;    // the next insert point
	char *tmp;    // varies
	int len_rep;  // length of rep (the string to remove)
	int len_with; // length of with (the string to replace rep with)
	int len_front; // distance between rep and end of last rep
	int count;    // number of replacements

	len_rep = strlen(rep);
	if (len_rep == 0) {
		return args[0]; // empty rep causes infinite loop during count
	}

	len_with = strlen(with);

	// count the number of replacements needed
	ins = orig;
	for (count = 0; (tmp = strstr(ins, rep)); ++count) {
		ins = tmp + len_rep;
	}

	size_t len_res = strlen(orig) + (len_with - len_rep) * count + 1;
	lbm_value lbm_res;
	if (lbm_create_array(&lbm_res, LBM_VAL_TYPE_CHAR, len_res)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(lbm_res);
		tmp = result = (char*)arr->data;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}

	// first time through the loop, all the variable are set correctly
	// from here on,
	//    tmp points to the end of the result string
	//    ins points to the next occurrence of rep in orig
	//    orig points to the remainder of orig after "end of rep"
	while (count--) {
		ins = strstr(orig, rep);
		len_front = ins - orig;
		tmp = strncpy(tmp, orig, len_front) + len_front;
		tmp = strcpy(tmp, with) + len_with;
		orig += len_front + len_rep; // move to next "end of rep"
	}
	strcpy(tmp, orig);

	return lbm_res;
}

static lbm_value ext_str_to_lower(lbm_value *args, lbm_uint argn) {
	if (argn != 1) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *orig = lbm_dec_str(args[0]);
	if (!orig) {
		return lbm_enc_sym(SYM_TERROR);
	}

	int len = strlen(orig);
	lbm_value lbm_res;
	if (lbm_create_array(&lbm_res, LBM_VAL_TYPE_CHAR, len + 1)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(lbm_res);
		for (int i = 0;i < len;i++) {
			((char*)(arr->data))[i] = tolower(orig[i]);
		}
		((char*)(arr->data))[len] = '\0';
		return lbm_res;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}
}

static lbm_value ext_str_to_upper(lbm_value *args, lbm_uint argn) {
	if (argn != 1) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *orig = lbm_dec_str(args[0]);
	if (!orig) {
		return lbm_enc_sym(SYM_TERROR);
	}

	int len = strlen(orig);
	lbm_value lbm_res;
	if (lbm_create_array(&lbm_res, LBM_VAL_TYPE_CHAR, len + 1)) {
		lbm_array_header_t *arr = (lbm_array_header_t*)lbm_car(lbm_res);
		for (int i = 0;i < len;i++) {
			((char*)(arr->data))[i] = toupper(orig[i]);
		}
		((char*)(arr->data))[len] = '\0';
		return lbm_res;
	} else {
		return lbm_enc_sym(SYM_MERROR);
	}
}

static lbm_value ext_str_cmp(lbm_value *args, lbm_uint argn) {
	if (argn != 2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str1 = lbm_dec_str(args[0]);
	if (!str1) {
		return lbm_enc_sym(SYM_EERROR);
	}

	char *str2 = lbm_dec_str(args[1]);
	if (!str2) {
		return lbm_enc_sym(SYM_EERROR);
	}

	return lbm_enc_i(strcmp(str1, str2));
}

void lispif_load_vesc_extensions(void) {
	lbm_add_symbol_const("event-can-sid", &sym_event_can_sid);
	lbm_add_symbol_const("event-can-eid", &sym_event_can_eid);
	lbm_add_symbol_const("event-data-rx", &sym_event_data_rx);

	memset(&syms_bms, 0, sizeof(syms_bms));

	// Various commands
	lbm_add_extension("print", ext_print);
	lbm_add_extension("timeout-reset", ext_reset_timeout);
	lbm_add_extension("get-ppm", ext_get_ppm);
	lbm_add_extension("get-encoder", ext_get_encoder);
	lbm_add_extension("set-servo", ext_set_servo);
	lbm_add_extension("get-vin", ext_get_vin);
	lbm_add_extension("select-motor", ext_select_motor);
	lbm_add_extension("get-selected-motor", ext_get_selected_motor);
	lbm_add_extension("get-bms-val", ext_get_bms_val);
	lbm_add_extension("get-adc", ext_get_adc);
	lbm_add_extension("systime", ext_systime);
	lbm_add_extension("secs-since", ext_secs_since);
	lbm_add_extension("set-aux", ext_set_aux);
	lbm_add_extension("event-register-handler", ext_register_event_handler);
	lbm_add_extension("event-enable", ext_enable_event);
	lbm_add_extension("get-imu-rpy", ext_get_imu_rpy);
	lbm_add_extension("get-imu-quat", ext_get_imu_quat);
	lbm_add_extension("get-imu-acc", ext_get_imu_acc);
	lbm_add_extension("get-imu-gyro", ext_get_imu_gyro);
	lbm_add_extension("get-imu-mag", ext_get_imu_mag);
	lbm_add_extension("get-imu-acc-derot", ext_get_imu_acc_derot);
	lbm_add_extension("get-imu-gyro-derot", ext_get_imu_gyro_derot);
	lbm_add_extension("send-data", ext_send_data);
	lbm_add_extension("get-remote-state", ext_get_remote_state);
	lbm_add_extension("eeprom-store-f", ext_eeprom_store_f);
	lbm_add_extension("eeprom-read-f", ext_eeprom_read_f);
	lbm_add_extension("eeprom-store-i", ext_eeprom_store_i);
	lbm_add_extension("eeprom-read-i", ext_eeprom_read_i);

	// Motor set commands
	lbm_add_extension("set-current", ext_set_current);
	lbm_add_extension("set-current-rel", ext_set_current_rel);
	lbm_add_extension("set-duty", ext_set_duty);
	lbm_add_extension("set-brake", ext_set_brake);
	lbm_add_extension("set-brake-rel", ext_set_brake_rel);
	lbm_add_extension("set-handbrake", ext_set_handbrake);
	lbm_add_extension("set-handbrake-rel", ext_set_handbrake_rel);
	lbm_add_extension("set-rpm", ext_set_rpm);
	lbm_add_extension("set-pos", ext_set_pos);

	// Motor get commands
	lbm_add_extension("get-current", ext_get_current);
	lbm_add_extension("get-current-dir", ext_get_current_dir);
	lbm_add_extension("get-current-in", ext_get_current_in);
	lbm_add_extension("get-duty", ext_get_duty);
	lbm_add_extension("get-rpm", ext_get_rpm);
	lbm_add_extension("get-temp-fet", ext_get_temp_fet);
	lbm_add_extension("get-temp-mot", ext_get_temp_mot);
	lbm_add_extension("get-speed", ext_get_speed);
	lbm_add_extension("get-dist", ext_get_dist);
	lbm_add_extension("get-batt", ext_get_batt);
	lbm_add_extension("get-fault", ext_get_fault);

	// CAN-comands
	lbm_add_extension("canset-current", ext_can_current);
	lbm_add_extension("canset-current-rel", ext_can_current_rel);
	lbm_add_extension("canset-duty", ext_can_duty);
	lbm_add_extension("canset-brake", ext_can_brake);
	lbm_add_extension("canset-brake-rel", ext_can_brake_rel);
	lbm_add_extension("canset-rpm", ext_can_rpm);
	lbm_add_extension("canset-pos", ext_can_pos);

	lbm_add_extension("canget-current", ext_can_get_current);
	lbm_add_extension("canget-current-dir", ext_can_get_current_dir);
	lbm_add_extension("canget-current-in", ext_can_get_current_in);
	lbm_add_extension("canget-duty", ext_can_get_duty);
	lbm_add_extension("canget-rpm", ext_can_get_rpm);
	lbm_add_extension("canget-temp-fet", ext_can_get_temp_fet);
	lbm_add_extension("canget-temp-motor", ext_can_get_temp_motor);
	lbm_add_extension("canget-speed", ext_can_get_speed);
	lbm_add_extension("canget-dist", ext_can_get_dist);

	lbm_add_extension("can-list-devs", ext_can_list_devs);
	lbm_add_extension("can-scan", ext_can_scan);
	lbm_add_extension("can-send-sid", ext_can_send_sid);
	lbm_add_extension("can-send-eid", ext_can_send_eid);

	// Math
	lbm_add_extension("sin", ext_sin);
	lbm_add_extension("cos", ext_cos);
	lbm_add_extension("tan", ext_tan);
	lbm_add_extension("asin", ext_asin);
	lbm_add_extension("acos", ext_acos);
	lbm_add_extension("atan", ext_atan);
	lbm_add_extension("atan2", ext_atan2);
	lbm_add_extension("pow", ext_pow);
	lbm_add_extension("sqrt", ext_sqrt);
	lbm_add_extension("log", ext_log);
	lbm_add_extension("log10", ext_log10);
	lbm_add_extension("deg2rad", ext_deg2rad);
	lbm_add_extension("rad2deg", ext_rad2deg);
	lbm_add_extension("vec3-rot", ext_vec3_rot);

	// Bit operations
	lbm_add_extension("bits-enc-int", ext_bits_enc_int);
	lbm_add_extension("bits-dec-int", ext_bits_dec_int);

	// Raw readings
	lbm_add_extension("raw-adc-current", ext_raw_adc_current);
	lbm_add_extension("raw-adc-voltage", ext_raw_adc_voltage);
	lbm_add_extension("raw-mod-alpha", ext_raw_mod_alpha);
	lbm_add_extension("raw-mod-beta", ext_raw_mod_beta);
	lbm_add_extension("raw-mod-alpha-measured", ext_raw_mod_alpha_measured);
	lbm_add_extension("raw-mod-beta-measured", ext_raw_mod_beta_measured);
	lbm_add_extension("raw-hall", ext_raw_hall);

	// UART
	uart_started = false;
	lbm_add_extension("uart-start", ext_uart_start);
	lbm_add_extension("uart-write", ext_uart_write);
	lbm_add_extension("uart-read", ext_uart_read);

	// I2C
	i2c_started = false;
	lbm_add_extension("i2c-start", ext_i2c_start);
	lbm_add_extension("i2c-tx-rx", ext_i2c_tx_rx);
	lbm_add_extension("i2c-restore", ext_i2c_restore);

	// String manipulation
	lbm_add_extension("str-from-n", ext_str_from_n);
	lbm_add_extension("str-merge", ext_str_merge);
	lbm_add_extension("str-to-i", ext_str_to_i);
	lbm_add_extension("str-to-f", ext_str_to_f);
	lbm_add_extension("str-part", ext_str_part);
	lbm_add_extension("str-split", ext_str_split);
	lbm_add_extension("str-replace", ext_str_replace);
	lbm_add_extension("str-to-lower", ext_str_to_lower);
	lbm_add_extension("str-to-upper", ext_str_to_upper);
	lbm_add_extension("str-cmp", ext_str_cmp);

	// Array extensions
	lbm_array_extensions_init();
}

void lispif_process_can(uint32_t can_id, uint8_t *data8, int len, bool is_ext) {
	if (!event_handler_registered) {
		return;
	}

	if (!event_can_sid_en && !is_ext) {
		return;
	}

	if (!event_can_eid_en && is_ext) {
		return;
	}

	bool ok = true;

	int timeout_cnt = 1000;
	lbm_pause_eval_with_gc(100);
	while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED && timeout_cnt > 0) {
		chThdSleep(1);
		timeout_cnt--;
	}
	ok = timeout_cnt > 0;

	if (ok) {
		lbm_value bytes;
		if (!lbm_create_array(&bytes, LBM_VAL_TYPE_BYTE, len)) {
			lbm_continue_eval();
			return;
		}
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(bytes);
		memcpy(array->data, data8, len);

		lbm_value msg_data = lbm_cons(lbm_enc_I(can_id), bytes);
		lbm_value msg;

		if (is_ext) {
			msg = lbm_cons(lbm_enc_sym(sym_event_can_eid), msg_data);
		} else {
			msg = lbm_cons(lbm_enc_sym(sym_event_can_sid), msg_data);
		}

		lbm_send_message(event_handler_pid, msg);
	}

	lbm_continue_eval();
}

void lispif_process_custom_app_data(unsigned char *data, unsigned int len) {
	if (!event_handler_registered) {
		return;
	}

	if (!event_data_rx_en) {
		return;
	}

	bool ok = true;

	int timeout_cnt = 1000;
	lbm_pause_eval_with_gc(100);
	while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED && timeout_cnt > 0) {
		chThdSleep(1);
		timeout_cnt--;
	}
	ok = timeout_cnt > 0;

	if (ok) {
		lbm_value bytes;
		if (!lbm_create_array(&bytes, LBM_VAL_TYPE_BYTE, len)) {
			lbm_continue_eval();
			return;
		}
		lbm_array_header_t *array = (lbm_array_header_t *)lbm_car(bytes);
		memcpy(array->data, data, len);

		lbm_value msg = lbm_cons(lbm_enc_sym(sym_event_data_rx), bytes);

		lbm_send_message(event_handler_pid, msg);
	}

	lbm_continue_eval();
}

void lispif_disable_all_events(void) {
	event_handler_registered = false;
	event_can_sid_en = false;
	event_can_eid_en = false;
}