toaster-oven-bluepill/Core/Src/app_safety.c

/**
 * TODO file description
 */

#include "app_safety.h"
#include "app_heater.h"
#include "snprintf.h"
#include "stm32f1xx_ll_iwdg.h"
#include "stm32f1xx_ll_gpio.h"
#include "main.h"

#define HB_FLAG_TEMP_NORMAL (1 << 0)
#define HB_FLAG_ADC_SAMPLING (1 << 1)
#define HB_FLAG_TEMP_CALCULATION (1 << 2)
#define HB_FLAG_REG_LOOP (1 << 3)
#define HB_FLAG_DISPLAY_UPDATING (1 << 4)
#define HB_FLAG_SOC_TEMP_OK (1 << 5)

//#define HB_FLAG_ALL (0b111111)
#define HB_FLAG_ALL (0b111110) // FIXME !!!! disabling the temp watchdog

static volatile uint32_t heartbeat_flags = 0;

void app_safety_pass_temp_normal() {
    heartbeat_flags |= HB_FLAG_TEMP_NORMAL;
}

void app_safety_pass_adc_sampling() {
    heartbeat_flags |= HB_FLAG_ADC_SAMPLING;
}

void app_safety_pass_temp_calculation() {
    heartbeat_flags |= HB_FLAG_TEMP_CALCULATION;
}

void app_safety_pass_reg_loop_running() {
    heartbeat_flags |= HB_FLAG_REG_LOOP;
}

void app_safety_pass_display_updating() {
    heartbeat_flags |= HB_FLAG_DISPLAY_UPDATING;
}

void app_safety_pass_soc_temp_ok() {
    heartbeat_flags |= HB_FLAG_SOC_TEMP_OK;
}

void app_safety_poll() {
    if ((heartbeat_flags & HB_FLAG_ALL) == HB_FLAG_ALL) {
        LL_IWDG_ReloadCounter(IWDG);
        LL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
        heartbeat_flags = 0;
    }
}

// emergency shutdown, this must not block use RTOS since it can be called from fault handlers or interrupt
void __attribute__((noreturn)) app_emergency_stop() {
    app_heater_emergency_shutdown();

    PUTS("\r\n*** EMERGENCY STOP ***\r\n");

    while (1) {
        // wait for the watchdog to bite
    }
}