rusefi-1/firmware/hw_layer/io_pins.cpp

/**
 * @file	io_pins.cpp
 * @brief	his file is about general input/output utility methods, not much EFI-specifics
 *
 *
 * @date Jan 24, 2013
 * @author Andrey Belomutskiy, (c) 2012-2020
 */

#include "pch.h"

#if EFI_PROD_CODE
#include "os_access.h"
#include "drivers/gpio/gpio_ext.h"

#include "status_loop.h"
#include "console_io.h"
#endif /* EFI_PROD_CODE */

void efiSetPadUnused(brain_pin_e brainPin) {
#if EFI_PROD_CODE
	/* input with pull up, is it safe? */
	iomode_t mode = PAL_STM32_MODE_INPUT | PAL_STM32_PUPDR_PULLUP;

	if (brain_pin_is_onchip(brainPin)) {
		ioportid_t port = getHwPort("unused", brainPin);
		ioportmask_t pin = getHwPin("unused", brainPin);

		/* input with pull up, is it safe?
		 * todo: shall we reuse 'default state' constants with board.h?
		 * */
		palSetPadMode(port, pin, mode);
		palWritePad(port, pin, 0);
	}
	#if (BOARD_EXT_GPIOCHIPS > 0)
		else {
			gpiochips_setPadMode(brainPin, mode);
		}
	#endif
#endif /* EFI_PROD_CODE */

	brain_pin_markUnused(brainPin);
}

/**
 * This method would set an error condition if pin is already used
 */
void efiSetPadMode(const char *msg, brain_pin_e brainPin, iomode_t mode) {
	if (!isBrainPinValid(brainPin)) {
		// No pin configured, nothing to do here.
		return;
	}

	bool wasUsed = brain_pin_markUsed(brainPin, msg);

	if (!wasUsed) {
		efiSetPadModeWithoutOwnershipAcquisition(msg, brainPin, mode);
	}
}

void efiSetPadModeWithoutOwnershipAcquisition(const char *msg, brain_pin_e brainPin, iomode_t mode) {
#if EFI_PROD_CODE
	/*check if on-chip pin or external */
	if (brain_pin_is_onchip(brainPin)) {
		/* on-chip */
		ioportid_t port = getHwPort(msg, brainPin);
		ioportmask_t pin = getHwPin(msg, brainPin);
		/* paranoid */
		if (port == GPIO_NULL)
			return;

		palSetPadMode(port, pin, mode);
	}
	#if (BOARD_EXT_GPIOCHIPS > 0)
		else {
			gpiochips_setPadMode(brainPin, mode);
		}
	#endif

#endif /* EFI_PROD_CODE */
}

#if EFI_PROD_CODE

#if EFI_ENGINE_CONTROL
#include "main_trigger_callback.h"
#endif /* EFI_ENGINE_CONTROL */

bool efiReadPin(brain_pin_e pin) {
	if (!isBrainPinValid(pin))
		return false;
	if (brain_pin_is_onchip(pin))
		return palReadPad(getHwPort("readPin", pin), getHwPin("readPin", pin));
	#if (BOARD_EXT_GPIOCHIPS > 0)
		else if (brain_pin_is_ext(pin))
			return (gpiochips_readPad(pin) > 0);
	#endif

	/* incorrect pin */
	return false;
}

iomode_t getInputMode(pin_input_mode_e mode) {
	switch (mode) {
	case PI_PULLUP:
		return PAL_MODE_INPUT_PULLUP;
	case PI_PULLDOWN:
		return PAL_MODE_INPUT_PULLDOWN;
	case PI_DEFAULT:
	default:
		return PAL_MODE_INPUT;
	}
}

void writePad(const char *msg, brain_pin_e pin, int bit) {
	palWritePad(getHwPort(msg, pin), getHwPin(msg, pin), bit);
}

#else /* EFI_PROD_CODE */

// This has been made global so we don't need to worry about efiReadPin having access the object
//  we store it in, every time we need to use efiReadPin.
bool mockPinStates[BRAIN_PIN_COUNT];

bool efiReadPin(brain_pin_e pin) {
	return mockPinStates[static_cast<int>(pin)];
}

void setMockState(brain_pin_e pin, bool state) {
	mockPinStates[static_cast<int>(pin)] = state;
}

#endif /* EFI_PROD_CODE */