gpio_ext.h

Go to the documentation of this file.

/*
 * @file gpio_ext.h
 *
 * Abstraction layer definitions for extrenal gpios
 *
 * @date Mar 8, 2019
 * @author Andrey Gusakov, (c) 2019
 */
 
#pragma once
 
#if EFI_PROD_CODE
#include "board.h"
#endif /* EFI_PROD_CODE */
 
#include "rusefi_enums.h"
 
/*==========================================================================*/
/* Checks                                                                   */
/*==========================================================================*/
 
struct GpioChip {
    virtual int init() = 0;
 
    // These functions need not be implemented if not supported by the particular chip.
    /* pin argument is pin number within gpio chip, not a global number */
    virtual int setPadMode(size_t /*pin*/, iomode_t /*mode*/) { return -1; }
    virtual int writePad(size_t /*pin*/, int /*value*/) { return -1; }
    virtual int readPad(size_t /*pin*/) { return -1; }
    virtual int setPadPWM(size_t /*pin*/, float /*frequency*/, float /*duty*/) { return -1; }
    virtual brain_pin_diag_e getDiag(size_t /*pin*/) { return PIN_OK; }
    virtual int deinit() { return 0; }
    virtual void debug() { }
 
    /* chip needs reinitialization due to some critical issue */
    bool                        need_init = 0;
    int                         init_cnt = 0;
    int             alive_cnt = 0;
 
    int statusCode;
};
 
int gpiochips_getPinOffset(brain_pin_e pin);
const char *gpiochips_getChipName(brain_pin_e pin);
const char *gpiochips_getPinName(brain_pin_e pin);
 
/* register/unregister GPIO chip */
int gpiochip_register(brain_pin_e base, const char *name, GpioChip& chip, size_t size);
 
/* Set individual names for pins */
int gpiochips_setPinNames(brain_pin_e base, const char **names);
 
/* gpio extenders subsystem init */
int gpiochips_init(void);
 
int gpiochips_setPadMode(brain_pin_e pin, iomode_t mode);
int gpiochips_writePad(brain_pin_e pin, int value);
int gpiochips_readPad(brain_pin_e pin);
brain_pin_diag_e gpiochips_getDiag(brain_pin_e pin);
 
void gpiochips_debug();
 
#if EFI_PROD_CODE
hardware_pwm* gpiochip_tryInitPwm(const char* msg, brain_pin_e pin, float frequency, float duty);
#endif
 
/* return total number of external gpios */
int gpiochips_get_total_pins(void);