trigger_input_exti.cpp

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/**
 * @file    trigger_input_exti.cpp
 * @brief   Position sensor hardware layer - PAL version
 *
 * todo: VVT implementation is a nasty copy-paste :(
 *
 * see digital_input_icu.cp
 *
 * @date Dec 30, 2012
 * @author Andrey Belomutskiy, (c) 2012-2021
 */
 
#include "pch.h"
 
#if EFI_SHAFT_POSITION_INPUT && (HAL_TRIGGER_USE_PAL == TRUE)
 
#include "trigger_input.h"
#include "digital_input_exti.h"
 
#if (PAL_USE_CALLBACKS == FALSE)
    #error "PAL_USE_CALLBACKS should be enabled to use HAL_TRIGGER_USE_PAL"
#endif
 
static ioline_t shaftLines[TRIGGER_INPUT_PIN_COUNT];
static ioline_t camLines[CAM_INPUTS_COUNT];
 
static void shaft_callback(void *arg, efitick_t stamp) {
    // do the time sensitive things as early as possible!
    int index = (int)arg;
    ioline_t pal_line = shaftLines[index];
    bool rise = (palReadLine(pal_line) == PAL_HIGH);
 
    // todo: support for 3rd trigger input channel
    // todo: start using real event time from HW event, not just software timer?
 
    hwHandleShaftSignal(index, rise, stamp);
}
 
static void cam_callback(void *arg, efitick_t stamp) {
    int index = (int)arg;
    ioline_t pal_line = camLines[index];
 
    bool rise = (palReadLine(pal_line) == PAL_HIGH);
 
    hwHandleVvtCamSignal(rise, stamp, index);
}
 
/*==========================================================================*/
/* Exported functions.                                                      */
/*==========================================================================*/
 
int extiTriggerTurnOnInputPin(const char *msg, int index, bool isTriggerShaft) {
    brain_pin_e brainPin = isTriggerShaft ? engineConfiguration->triggerInputPins[index] : engineConfiguration->camInputs[index];
 
    efiPrintf("extiTriggerTurnOnInputPin %s %s", msg, hwPortname(brainPin));
 
    /* TODO:
     * * do not set to both edges if we need only one
     * * simplify callback in case of one edge */
    if (efiExtiEnablePin(msg, brainPin, PAL_EVENT_MODE_BOTH_EDGES,
        isTriggerShaft ? shaft_callback : cam_callback, (void *)index) < 0) {
        return -1;
    }
 
    ioline_t pal_line = PAL_LINE(getHwPort("trg", brainPin), getHwPin("trg", brainPin));
    if (isTriggerShaft) {
        shaftLines[index] = pal_line;
    } else {
        camLines[index] = pal_line;
    }
 
    return 0;
}
 
void extiTriggerTurnOffInputPin(brain_pin_e brainPin) {
    efiExtiDisablePin(brainPin);
}
 
#endif /* (EFI_SHAFT_POSITION_INPUT && (HAL_TRIGGER_USE_PAL == TRUE)) */