mirror of https://github.com/rusefi/ChibiOS.git
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS/RT.
|
|
|
|
ChibiOS/RT 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.
|
|
|
|
ChibiOS/RT 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/>.
|
|
*/
|
|
|
|
/**
|
|
* This is device realize "read through write" paradigm. This is not
|
|
* standard, but most of I2C devices use this paradigm.
|
|
* You must write to device reading address, send restart to bus,
|
|
* and then begin reading process.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
#include "lis3.h"
|
|
|
|
|
|
#define lis3_addr 0b0011101
|
|
|
|
|
|
/* buffers */
|
|
static uint8_t accel_rx_data[ACCEL_RX_DEPTH];
|
|
static uint8_t accel_tx_data[ACCEL_TX_DEPTH];
|
|
|
|
static i2cflags_t errors = 0;
|
|
|
|
static int16_t acceleration_x = 0;
|
|
static int16_t acceleration_y = 0;
|
|
static int16_t acceleration_z = 0;
|
|
|
|
|
|
/**
|
|
* Init function. Here we will also start personal serving thread.
|
|
*/
|
|
int init_lis3(void){
|
|
/* configure accelerometer */
|
|
accel_tx_data[0] = ACCEL_CTRL_REG1 | AUTO_INCREMENT_BIT; /* register address */
|
|
accel_tx_data[1] = 0b11100111;
|
|
accel_tx_data[2] = 0b01000001;
|
|
accel_tx_data[3] = 0b00000000;
|
|
|
|
/* sending */
|
|
i2cAcquireBus(&I2CD1);
|
|
i2cMasterTransmit(&I2CD1, lis3_addr, accel_tx_data, 4, accel_rx_data, 0, &errors, TIME_INFINITE);
|
|
i2cReleaseBus(&I2CD1);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
void request_acceleration_data(void){
|
|
accel_tx_data[0] = ACCEL_OUT_DATA | AUTO_INCREMENT_BIT; // register address
|
|
i2cAcquireBus(&I2CD1);
|
|
i2cMasterTransmit(&I2CD1, lis3_addr, accel_tx_data, 1, accel_rx_data, 6, &errors, TIME_INFINITE);
|
|
i2cReleaseBus(&I2CD1);
|
|
|
|
acceleration_x = accel_rx_data[0] + (accel_rx_data[1] << 8);
|
|
acceleration_y = accel_rx_data[2] + (accel_rx_data[3] << 8);
|
|
acceleration_z = accel_rx_data[4] + (accel_rx_data[5] << 8);
|
|
}
|
|
|