Further rewrite safety handling

stm-firmware/include/helper-macros/helper-macros.h

@@ -36,4 +36,6 @@
 
 #define ABS(a) ((a) < 0 ? (-1*(a)) : (a))
 
+#define is_power_of_two(num) ((num) && !((num) & ((num) - 1)))
+
 #endif /* __HELPER_MACROS_H__ */

stm-firmware/include/reflow-controller/oven-driver.h

@@ -25,32 +25,9 @@
 #include <stdbool.h>
 #include <reflow-controller/pid-controller.h>
 
-enum oven_pid_error_report {
+enum oven_pid_status {OVEN_PID_DEACTIVATED,
-	OVEN_PID_NO_ERROR = 0,
+		      OVEN_PID_RUNNING,
-	OVEN_PID_ERR_PT1000_ADC_WATCHDOG = (1<<0),
+		      OVEN_PID_ABORTED};
-	OVEN_PID_ERR_PT1000_ADC_OFF = (1<<1),
-	OVEN_PID_ERR_PT1000_OTHER = (1<<2),
-	OVEN_PID_ERR_VREF_TOL = (1<<3),
-	OVEN_PID_ERR_OVERTEMP = (1<<4),
-};
-
-struct oven_pid_errors {
-	bool generic_error;
-	bool pt1000_adc_watchdog;
-	bool pt1000_adc_off;
-	bool pt1000_other;
-	bool vref_tol;
-	bool controller_overtemp;
-};
-
-struct oven_pid_status {
-	bool active;
-	bool error_set;
-	struct oven_pid_errors error_flags;
-	float target_temp;
-	float current_temp;
-	uint64_t timestamp_last_run;
-};
 
 void oven_driver_init(void);
 
@@ -66,8 +43,8 @@ void oven_pid_handle(float target_temp);
 
 void oven_pid_stop();
 
-void oven_pid_report_error(enum oven_pid_error_report report);
+void oven_driver_apply_power_level(void);
 
-const struct oven_pid_status *oven_pid_get_status(void);
+enum oven_pid_status oven_pid_get_status(void);
 
 #endif /* __OVEN_DRIVER_H__ */

stm-firmware/include/reflow-controller/safety/safety-adc.h

@@ -29,26 +29,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#define SAFETY_ADC_VREF_MVOLT (2500.0f)
-#define SAFETY_ADC_VREF_TOL_MVOLT (100.0f)
-#define SAFETY_ADC_TEMP_LOW_LIM (0.0f)
-#define SAFETY_ADC_TEMP_HIGH_LIM (65.0f)
-
 enum safety_adc_meas_channel {SAFETY_ADC_MEAS_VREF, SAFETY_ADC_MEAS_TEMP};
-enum safety_adc_check_result {
-				SAFETY_ADC_CHECK_OK = 0UL,
-				SAFETY_ADC_CHECK_VREF_LOW = (1U<<0),
-				SAFETY_ADC_CHECK_VREF_HIGH = (1U<<1),
-				SAFETY_ADC_CHECK_TEMP_LOW = (1U<<2),
-				SAFETY_ADC_CHECK_TEMP_HIGH = (1U<<3),
-				SAFETY_ADC_INTERNAL_ERROR = (1U<<4),
-				};
-
-extern enum safety_adc_check_result global_safety_adc_status;
-
-enum safety_adc_check_result safety_adc_get_errors();
-
-void safety_adc_clear_errors(void);
 
 void safety_adc_init();
 
@@ -63,14 +44,9 @@ void safety_adc_trigger_meas(enum safety_adc_meas_channel measurement);
  */
 int safety_adc_poll_result(uint16_t *adc_result);
 
-enum safety_adc_check_result safety_adc_check_results(uint16_t vref_result, uint16_t temp_result,
-						      float *vref_calculated, float *temp_calculated);
-
 enum safety_adc_check_result handle_safety_adc();
 
-float safety_adc_get_temp();
+float safety_adc_convert_channel(enum safety_adc_meas_channel channel, uint16_t analog_value);
-
-float safety_adc_get_vref();
 
 #endif /* __SAFETY_ADC_H__ */
 

stm-firmware/include/reflow-controller/safety/safety-config.h

@@ -68,4 +68,9 @@ enum analog_value_monitor {
 
 #define HALTING_CAREMASK (ERR_FLAG_STACK | ERR_FLAG_AMON_UC_TEMP)
 
+#define SAFETY_ADC_VREF_MVOLT (2500.0f)
+#define SAFETY_ADC_VREF_TOL_MVOLT (100.0f)
+#define SAFETY_ADC_TEMP_LOW_LIM (0.0f)
+#define SAFETY_ADC_TEMP_HIGH_LIM (65.0f)
+
 #endif /* __SAFETY_CONFIG_H__ */

stm-firmware/include/reflow-controller/safety/safety-controller.h

@@ -30,6 +30,12 @@
 #include <reflow-controller/safety/safety-config.h>
 #include <stdbool.h>
 
+enum analog_monitor_status {ANALOG_MONITOR_OK = 0,
+			    ANALOG_MONITOR_ERROR,
+			    ANALOG_MONITOR_INACTIVE,
+			    ANALOG_MONITOR_OVER,
+			    ANALOG_MONITOR_UNDER};
+
 /**
  * @brief Initialize the safety controller
  *
@@ -50,8 +56,14 @@ int safety_controller_report_error(enum safety_flag flag);
 
 void safety_controller_report_timing(enum timing_monitor monitor);
 
+void safety_controller_report_analog_value(enum analog_value_monitor monitor, float value);
+
 int safety_controller_enable_timing_mon(enum timing_monitor monitor, bool enable);
 
+enum analog_monitor_status safety_controller_get_analog_mon_value(enum analog_value_monitor monitor, float *value);
+
+bool safety_controller_get_flag(enum safety_flag);
+
 #endif /* __SAFETY_CONTROLLER_H__ */
 
 /** @} */

stm-firmware/main.c

@@ -41,9 +41,9 @@
 #include <stm-periph/uart.h>
 #include <reflow-controller/shell-uart-config.h>
 #include <reflow-controller/oven-driver.h>
-#include <reflow-controller/safety/safety-adc.h>
 #include <fatfs/ff.h>
 #include <reflow-controller/reflow-menu.h>
+#include <reflow-controller/safety/safety-controller.h>
 
 bool global_error_state;
 
@@ -154,12 +154,14 @@ static inline void setup_system(void)
 	led_setup();
 	loudspeaker_setup();
 	reflow_menu_init();
-	safety_adc_init();
+
 
 	uart_gpio_config();
 	setup_shell_uart(&shell_uart);
 
 	setup_unused_pins();
+
+
 }
 
 static void handle_shell_uart_input(shellmatta_handle_t shell_handle)
@@ -188,39 +190,12 @@ static void zero_ccm_ram(void)
 		ptr[i] = 0UL;
 }
 
-/**
- * @brief This function sets the appropriate error flags in the oven PID controller
- * depending on the Safety ADC measurements.
- * The PID controller's error flags have to be cleared via the GUI by either starting a new RUN or explicitly
- * ack'ing these errors.
- */
-static void propagate_safety_adc_error_to_oven_pid(void)
-{
-	enum safety_adc_check_result safety_adc_result;
-
-	safety_adc_result = safety_adc_get_errors();
-
-	if (safety_adc_result & SAFETY_ADC_CHECK_TEMP_LOW ||
-	    safety_adc_result & SAFETY_ADC_CHECK_TEMP_HIGH)
-		oven_pid_report_error(OVEN_PID_ERR_OVERTEMP);
-
-	if (safety_adc_result & SAFETY_ADC_CHECK_VREF_LOW ||
-	    safety_adc_result & SAFETY_ADC_CHECK_VREF_HIGH)
-		oven_pid_report_error(OVEN_PID_ERR_VREF_TOL);
-
-	if (safety_adc_result & SAFETY_ADC_INTERNAL_ERROR)
-		oven_pid_report_error(0);
-}
-
 int main(void)
 {
 	bool sd_card_mounted = false;
 	shellmatta_handle_t shell_handle;
 	int menu_wait_request;
 	uint64_t quarter_sec_timestamp = 0ULL;
-	const struct oven_pid_status *pid_status;
-	enum adc_pt1000_error pt1000_status;
-
 	zero_ccm_ram();
 	setup_system();
 
@@ -232,31 +207,20 @@ int main(void)
 	while (1) {
 		sd_card_mounted = mount_sd_card_if_avail(sd_card_mounted);
 
-		pid_status = oven_pid_get_status();
-
 		if (systick_ticks_have_passed(quarter_sec_timestamp, 250)) {
 			quarter_sec_timestamp = systick_get_global_tick();
 
-			(void)handle_safety_adc();
+			if (0)
-			propagate_safety_adc_error_to_oven_pid();
-
-			if (global_error_state)
 				led_set(0, !led_get(0));
 			else
 				led_set(0, 0);
 		}
 
-		pt1000_status = adc_pt1000_check_error();
-		global_error_state = pid_status->error_set || !!safety_adc_get_errors() || !!pt1000_status;
-
 		menu_wait_request = reflow_menu_handle();
-
-		/* Deactivate oven output in case of error! */
-		if (!pid_status->active || global_error_state)
-			oven_driver_set_power(0U);
-
 		handle_shell_uart_input(shell_handle);
 
+		oven_driver_apply_power_level();
+
 		if (menu_wait_request)
 			__WFI();
 		else

stm-firmware/oven-driver.c

@@ -24,16 +24,12 @@
 #include <reflow-controller/systick.h>
 #include <reflow-controller/adc-meas.h>
 #include <reflow-controller/temp-converter.h>
+#include <reflow-controller/safety/safety-controller.h>
 
 static struct pid_controller oven_pid;
-
+static bool oven_pid_running = false;
-static struct oven_pid_status oven_pid_current_status = {
+static bool oven_pid_aborted = false;
-	.active = false,
+static uint8_t oven_driver_power_level = 0U;
-	.error_set = false,
-	.target_temp = 0.0f,
-	.current_temp = 0.0f,
-	.timestamp_last_run = 0ULL
-};
 
 void oven_driver_init()
 {
@@ -60,7 +56,12 @@ void oven_driver_set_power(uint8_t power)
 	if (power > 100U)
 		power = 100U;
 
-	OVEN_CONTROLLER_PWM_TIMER->CCR3 = power * 10;
+	oven_driver_power_level = power;
+}
+
+void oven_driver_apply_power_level(void)
+{
+	OVEN_CONTROLLER_PWM_TIMER->CCR3 = oven_driver_power_level * 10;
 }
 
 void oven_driver_disable()
@@ -71,93 +72,52 @@ void oven_driver_disable()
 	rcc_manager_disable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(OVEN_CONTROLLER_TIM_RCC_MASK));
 }
 
-void oven_pid_ack_errors(void)
-{
-	oven_pid_current_status.error_set = false;
-	oven_pid_current_status.error_flags.vref_tol = false;
-	oven_pid_current_status.error_flags.pt1000_other = false;
-	oven_pid_current_status.error_flags.generic_error = false;
-	oven_pid_current_status.error_flags.pt1000_adc_off = false;
-	oven_pid_current_status.error_flags.controller_overtemp = false;
-	oven_pid_current_status.error_flags.pt1000_adc_watchdog = false;
-}
-
 void oven_pid_init(struct pid_controller *controller_to_copy)
 {
 	pid_copy(&oven_pid, controller_to_copy);
 	oven_pid.output_sat_min = 0.0f;
 	oven_pid.output_sat_max = 100.0f;
-	oven_pid_current_status.timestamp_last_run = 0ULL;
+
-	oven_pid_current_status.active = true;
+	oven_pid_running = true;
-	oven_pid_ack_errors();
+	oven_pid_aborted = false;
+	safety_controller_report_timing(ERR_TIMING_PID);
 }
 
 void oven_pid_handle(float target_temp)
 {
 	float pid_out;
 	float current_temp;
-	int resistance_status;
+	static uint64_t timestamp_last_run;
-	enum adc_pt1000_error pt1000_error;
-
-	if (oven_pid_current_status.active && !oven_pid_current_status.error_set) {
-		if (systick_ticks_have_passed(oven_pid_current_status.timestamp_last_run,
-					      (uint64_t)(oven_pid.sample_period * 1000))) {
-
-			resistance_status = adc_pt1000_get_current_resistance(&current_temp);
-			if (resistance_status < 0) {
-				oven_driver_set_power(0);
-				pt1000_error = adc_pt1000_check_error();
-				if (pt1000_error & ADC_PT1000_WATCHDOG_ERROR)
-					oven_pid_report_error(OVEN_PID_ERR_PT1000_ADC_WATCHDOG);
-				if (pt1000_error & ADC_PT1000_INACTIVE)
-					oven_pid_report_error(OVEN_PID_ERR_PT1000_ADC_OFF);
-				if (pt1000_error & ADC_PT1000_OVERFLOW)
-					oven_pid_report_error(OVEN_PID_ERR_PT1000_OTHER);
-
-				return;
-			}
 
+	if (oven_pid_running && !oven_pid_aborted) {
+		if (systick_ticks_have_passed(timestamp_last_run, (uint64_t)(oven_pid.sample_period * 1000))) {
+			/* No need to check. Safety controller will monitor this */
+			(void)adc_pt1000_get_current_resistance(&current_temp);
 			(void)temp_converter_convert_resistance_to_temp(current_temp, &current_temp);
 
 			pid_out = pid_sample(&oven_pid, target_temp - current_temp);
 			oven_driver_set_power((uint8_t)pid_out);
-			oven_pid_current_status.timestamp_last_run = systick_get_global_tick();
+			timestamp_last_run = systick_get_global_tick();
-			oven_pid_current_status.target_temp = target_temp;
+
-			oven_pid_current_status.current_temp = current_temp;
+			safety_controller_report_timing(ERR_TIMING_PID);
 		}
 	}
 }
 
-void oven_pid_report_error(enum oven_pid_error_report report)
-{
-	struct oven_pid_errors *e = &oven_pid_current_status.error_flags;
-
-	oven_pid_current_status.active = false;
-	oven_pid_current_status.error_set = true;
-
-	if (report == 0) {
-		e->generic_error = true;
-	}
-	if (report & OVEN_PID_ERR_OVERTEMP)
-		e->controller_overtemp = true;
-	if (report & OVEN_PID_ERR_VREF_TOL)
-		e->controller_overtemp = true;
-	if (report & OVEN_PID_ERR_PT1000_OTHER)
-		e->pt1000_other = true;
-	if (report & OVEN_PID_ERR_PT1000_ADC_OFF)
-		e->pt1000_adc_off = true;
-	if (report & OVEN_PID_ERR_PT1000_ADC_WATCHDOG)
-		e->pt1000_adc_watchdog = true;
-}
-
-const struct oven_pid_status *oven_pid_get_status()
-{
-	return &oven_pid_current_status;
-}
-
 void oven_pid_stop()
 {
-	oven_pid_current_status.active = false;
+	oven_pid_running = false;
-	oven_pid_current_status.target_temp = 0.0f;
+	safety_controller_enable_timing_mon(ERR_TIMING_PID, false);
-	oven_pid_current_status.current_temp = 0.0f;
+}
+
+enum oven_pid_status oven_pid_get_status(void)
+{
+	enum oven_pid_status ret = OVEN_PID_ABORTED;
+
+	if (oven_pid_running && !oven_pid_aborted)
+		ret = OVEN_PID_RUNNING;
+	else if (!oven_pid_running && !oven_pid_aborted)
+		ret = OVEN_PID_DEACTIVATED;
+
+	return ret;
 }

stm-firmware/reflow-menu.c

@@ -24,7 +24,7 @@
 #include <reflow-controller/rotary-encoder.h>
 #include <reflow-controller/systick.h>
 #include <reflow-controller/adc-meas.h>
-#include <reflow-controller/safety/safety-adc.h>
+#include <reflow-controller/safety/safety-controller.h>
 #include <reflow-controller/temp-converter.h>
 #include <helper-macros/helper-macros.h>
 #include <stm-periph/unique-id.h>
@@ -90,11 +90,11 @@ static void reflow_menu_monitor(struct lcd_menu *menu, enum menu_entry_func_entr
 		snprintf(line, sizeof(line), "Temp: %s%.1f " LCD_DEGREE_SYMBOL_STRING "C", prefix, tmp);
 		menu->update_display(1, line);
 
-		tmp = safety_adc_get_temp();
+		(void)safety_controller_get_analog_mon_value(ERR_AMON_UC_TEMP, &tmp);
 		snprintf(line, sizeof(line), "Tj: %.1f " LCD_DEGREE_SYMBOL_STRING "C", tmp);
 		menu->update_display(2, line);
 
-		tmp = safety_adc_get_vref();
+		(void)safety_controller_get_analog_mon_value(ERR_AMON_VREF, &tmp);
 		snprintf(line, sizeof(line), "Vref: %.1f mV", tmp);
 		menu->update_display(3, line);
 	}

stm-firmware/safety/safety-adc.c

@@ -28,24 +28,10 @@
 #include <helper-macros/helper-macros.h>
 #include <stm-periph/clock-enable-manager.h>
 
-enum safety_adc_check_result global_safety_adc_status;
-
-enum safety_adc_check_result safety_adc_get_errors()
-{
-	return global_safety_adc_status;
-}
-
-void safety_adc_clear_errors(void)
-{
-	global_safety_adc_status = SAFETY_ADC_CHECK_OK;
-}
-
 void safety_adc_init()
 {
 	rcc_manager_enable_clock(&RCC->APB2ENR, BITMASK_TO_BITNO(SAFETY_ADC_ADC_RCC_MASK));
 
-	safety_adc_clear_errors();
-
 	/* Enable temperature and VREFINT measurement */
 	ADC->CCR |= ADC_CCR_TSVREFE;
 
@@ -65,38 +51,27 @@ void safety_adc_deinit()
 	rcc_manager_enable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(RCC_APB2ENR_ADC2EN));
 }
 
-enum safety_adc_check_result safety_adc_check_results(uint16_t vref_result, uint16_t temp_result,
+float safety_adc_convert_channel(enum safety_adc_meas_channel channel, uint16_t analog_value)
-						      float *vref_calculated, float *temp_calculated)
 {
-	enum safety_adc_check_result res = SAFETY_ADC_CHECK_OK;
+	float converted_val;
-	float vref;
-	float temp;
 
 
-	vref = (SAFETY_ADC_INT_REF_MV * 4095.0f) / (float)vref_result;
+
-	if (vref_calculated) {
+	switch (channel) {
-		*vref_calculated = vref;
+	case SAFETY_ADC_MEAS_TEMP:
+		converted_val = (((float)channel / 4095.0f * 2500.0f - SAFETY_ADC_TEMP_NOM_MV) /
+				 SAFETY_ADC_TEMP_MV_SLOPE) + SAFETY_ADC_TEMP_NOM;
+		break;
+	case SAFETY_ADC_MEAS_VREF:
+		converted_val = (SAFETY_ADC_INT_REF_MV * 4095.0f) / (float)analog_value;
+		break;
+	default:
+		/* Generate NaN value as default return */
+		converted_val = 0.0f / 0.0f;
+		break;
 	}
 
-	temp = (((float)temp_result / 4095.0f * 2500.0f -
+	return converted_val;
-			     SAFETY_ADC_TEMP_NOM_MV) / SAFETY_ADC_TEMP_MV_SLOPE) + SAFETY_ADC_TEMP_NOM;
-	if (temp_calculated) {
-		*temp_calculated = temp;
-	}
-
-	if (ABS(vref - SAFETY_ADC_VREF_MVOLT) > SAFETY_ADC_VREF_TOL_MVOLT) {
-		if (vref > SAFETY_ADC_VREF_MVOLT)
-			res |= SAFETY_ADC_CHECK_VREF_HIGH;
-		else
-			res |= SAFETY_ADC_CHECK_VREF_LOW;
-	}
-
-	if (temp < SAFETY_ADC_TEMP_LOW_LIM)
-		res |= SAFETY_ADC_CHECK_TEMP_LOW;
-	else if (temp < SAFETY_ADC_CHECK_TEMP_HIGH)
-		res |= SAFETY_ADC_CHECK_TEMP_HIGH;
-
-	return res;
 }
 
 int safety_adc_poll_result(uint16_t *adc_result)
@@ -136,60 +111,5 @@ void safety_adc_trigger_meas(enum safety_adc_meas_channel measurement)
 	SAFETY_ADC_ADC_PERIPHERAL->CR2 |= ADC_CR2_SWSTART;
 }
 
-static uint16_t safety_vref_meas_raw;
-static bool safety_vref_valid = false;
-static uint16_t safety_temp_meas_raw;
-static bool safety_temp_valid = false;
-static float safety_vref;
-static float safety_temp;
-
-enum safety_adc_check_result handle_safety_adc()
-{
-	static enum safety_adc_meas_channel safety_meas_channel = SAFETY_ADC_MEAS_VREF;
-	enum safety_adc_check_result check_result;
-	uint16_t result;
-	int poll_status;
-
-	poll_status = safety_adc_poll_result(&result);
-
-	if (poll_status < 0) {
-		safety_adc_trigger_meas(safety_meas_channel);
-	} else if (poll_status > 0) {
-		switch (safety_meas_channel) {
-		case SAFETY_ADC_MEAS_TEMP:
-			safety_temp_meas_raw = result;
-			safety_temp_valid = true;
-			safety_meas_channel = SAFETY_ADC_MEAS_VREF;
-			break;
-		case SAFETY_ADC_MEAS_VREF:
-			safety_vref_meas_raw = result;
-			safety_vref_valid = true;
-			safety_meas_channel = SAFETY_ADC_MEAS_TEMP;
-			break;
-		default:
-			safety_meas_channel = SAFETY_ADC_MEAS_VREF;
-			return SAFETY_ADC_INTERNAL_ERROR;
-		}
-	}
-
-	if (safety_temp_valid && safety_vref_valid) {
-		check_result = safety_adc_check_results(safety_vref_meas_raw, safety_temp_meas_raw, &safety_vref, &safety_temp);
-		global_safety_adc_status |= check_result;
-	} else {
-		check_result = SAFETY_ADC_CHECK_OK;
-	}
-
-	return check_result;
-}
-
-float safety_adc_get_temp()
-{
-	return safety_temp;
-}
-
-float safety_adc_get_vref()
-{
-	return safety_vref;
-}
 
 /** @} */

stm-firmware/safety/safety-controller.c

@@ -26,6 +26,8 @@
 #include <reflow-controller/safety/safety-controller.h>
 #include <reflow-controller/safety/safety-config.h>
 #include <reflow-controller/safety/watchdog.h>
+#include <reflow-controller/safety/safety-adc.h>
+#include <helper-macros/helper-macros.h>
 #include <reflow-controller/systick.h>
 
 #include <stdbool.h>
@@ -42,6 +44,7 @@ struct error_flag {
 struct timing_mon {
 	const char *name;
 	enum timing_monitor monitor;
+	enum safety_flag associated_flag;
 	uint64_t min_delta;
 	uint64_t max_delta;
 	uint64_t last;
@@ -51,6 +54,7 @@ struct timing_mon {
 struct analog_mon {
 	const char *name;
 	enum analog_value_monitor monitor;
+	enum safety_flag associated_flag;
 	float min;
 	float max;
 	float value;
@@ -64,8 +68,8 @@ struct analog_mon {
 #define COUNT_OF(x) ((sizeof(x)/sizeof(0[x])) / ((size_t)(!(sizeof(x) % sizeof(0[x])))))
 
 #define ERR_FLAG_ENTRY(errflag, persistency) {.name=#errflag, .flag = (errflag), .error_state = false, .persistent = (persistency)}
-#define TIM_MON_ENTRY(mon, min, max) {.name=#mon, .monitor = (mon), .min_delta = (min), .max_delta = (max), .last = 0ULL, .enabled= false}
+#define TIM_MON_ENTRY(mon, min, max, flag) {.name=#mon, .monitor = (mon), .associated_flag=(flag), .min_delta = (min), .max_delta = (max), .last = 0ULL, .enabled= false}
-#define ANA_MON_ENTRY(mon, min_value, max_value) {.name=#mon, .monitor = (mon), .min = (min_value), .max = (max_value), .value = 0.0f, .valid = false}
+#define ANA_MON_ENTRY(mon, min_value, max_value, flag) {.name=#mon, .monitor = (mon), .associated_flag=(flag), .min = (min_value), .max = (max_value), .value = 0.0f, .valid = false}
 
 static struct error_flag flags[] = {
 	ERR_FLAG_ENTRY(ERR_FLAG_MEAS_ADC_OFF, false),
@@ -80,16 +84,59 @@ static struct error_flag flags[] = {
 };
 
 static struct timing_mon timings[] = {
-	TIM_MON_ENTRY(ERR_TIMING_PID, 1, 800),
+	TIM_MON_ENTRY(ERR_TIMING_PID, 1, 800, ERR_FLAG_TIMING_PID),
-	TIM_MON_ENTRY(ERR_TIMING_MEAS_ADC, 1, 50),
+	TIM_MON_ENTRY(ERR_TIMING_MEAS_ADC, 1, 50, ERR_FLAG_TIMING_MEAS_ADC),
-	TIM_MON_ENTRY(ERR_TIMING_SAFETY_ADC, 220, 500),
 };
 
 static struct analog_mon analog_mons[] = {
-	ANA_MON_ENTRY(ERR_AMON_VREF, 2480.0f, 2520.0f),
+	ANA_MON_ENTRY(ERR_AMON_VREF, 2480.0f, 2520.0f, ERR_FLAG_AMON_VREF),
-	ANA_MON_ENTRY(ERR_AMON_UC_TEMP, 0.0f, 55.0f),
+	ANA_MON_ENTRY(ERR_AMON_UC_TEMP, 0.0f, 55.0f, ERR_FLAG_AMON_UC_TEMP),
 };
 
+static struct analog_mon *find_analog_mon(enum analog_value_monitor mon)
+{
+	uint32_t i;
+	struct analog_mon *ret = NULL;
+
+	for (i = 0; i < COUNT_OF(analog_mons); i++) {
+		if (analog_mons[i].monitor == mon)
+			ret = &analog_mons[i];
+	}
+
+	return ret;
+}
+
+static struct timing_mon *find_timing_mon(enum timing_monitor mon)
+{
+	uint32_t i;
+	struct timing_mon *ret = NULL;
+
+	for (i = 0; i < COUNT_OF(timings); i++) {
+		if (timings[i].monitor == mon)
+			ret = &timings[i];
+	}
+
+	return ret;
+}
+
+static struct error_flag *find_error_flag(enum safety_flag flag)
+{
+	uint32_t i;
+	struct error_flag *ret = NULL;
+
+	for (i = 0; i < COUNT_OF(flags); i++) {
+		if (flags[i].flag == flag)
+			ret = &flags[i];
+	}
+
+	return ret;
+}
+
+static void safety_controller_process_checks()
+{
+	// TODO: Implement
+}
+
 int safety_controller_report_error(enum safety_flag flag)
 {
 	uint32_t i;
@@ -102,11 +149,11 @@ int safety_controller_report_error(enum safety_flag flag)
 		}
 	}
 
+	safety_controller_process_checks();
+
 	return ret;
 }
 
-/** @} */
-
 void safety_controller_report_timing(enum timing_monitor monitor)
 {
 	uint32_t i;
@@ -115,22 +162,41 @@ void safety_controller_report_timing(enum timing_monitor monitor)
 
 	timestamp = systick_get_global_tick();
 
-	for (i = 0; i < COUNT_OF(timings); i++) {
+	tim = find_timing_mon(monitor);
-		tim = &timings[i];
+	if (tim) {
-		if (tim->monitor & monitor) {
-			tim->enabled = true;
 		tim->last = timestamp;
+		tim->enabled = true;
 	}
+
+	safety_controller_process_checks();
+}
+
+void safety_controller_report_analog_value(enum analog_value_monitor monitor, float value)
+{
+	struct analog_mon *ana;
+
+	/* Return if not a power of two */
+	if (!is_power_of_two(monitor))
+		return;
+	ana = find_analog_mon(monitor);
+	if (ana) {
+		ana->valid = true;
+		ana->value = value;
 	}
+
+	safety_controller_process_checks();
 }
 
 void safety_controller_init()
 {
+	safety_adc_init();
 	watchdog_setup(WATCHDOG_PRESCALER);
 }
 
 int safety_controller_handle()
 {
+	static
+
 	int ret = 0;
 
 	/* TODO: Handle safety ADC */
@@ -144,19 +210,49 @@ int safety_controller_handle()
 
 int safety_controller_enable_timing_mon(enum timing_monitor monitor, bool enable)
 {
-	uint32_t i;
 	struct timing_mon *tim;
 
 	if (enable) {
 		safety_controller_report_timing(monitor);
 	} else {
-		for (i = 0; i < COUNT_OF(timings); i++) {
+		tim = find_timing_mon(monitor);
-			tim = &timings[i];
+		if (!tim)
-			if (tim->monitor & monitor) {
+			return -1;
 		tim->enabled = false;
 	}
-		}
-	}
 
 	return 0;
 }
+
+enum analog_monitor_status safety_controller_get_analog_mon_value(enum analog_value_monitor monitor, float *value)
+{
+	struct analog_mon *mon;
+	int ret = ANALOG_MONITOR_ERROR;
+
+	if (!is_power_of_two(monitor))
+		goto go_out;
+
+	if (!value)
+		goto go_out;
+
+	mon = find_analog_mon(monitor);
+	if (mon) {
+		if (!mon->valid) {
+			ret = ANALOG_MONITOR_INACTIVE;
+			goto go_out;
+		}
+
+		*value = mon->value;
+		if (mon->value < mon->min)
+			ret = ANALOG_MONITOR_UNDER;
+		else if (mon->value > mon->max)
+			ret = ANALOG_MONITOR_OVER;
+		else
+			ret = ANALOG_MONITOR_OK;
+	}
+
+go_out:
+	return ret;
+}
+
+/** @} */

stm-firmware/shell.c

@@ -358,22 +358,10 @@ static shellmatta_retCode_t shell_cmd_safety_adc(const shellmatta_handle_t handl
 	(void)length;
 	(void)arguments;
 
-	shellmatta_printf(handle, "VREF:\t%8.2f\tmV\r\n", safety_adc_get_vref());
+	shellmatta_printf(handle, "VREF:\t%8.2f\tmV\r\n", 2500.0f);
-	shellmatta_printf(handle, "TEMP:\t%8.2f\tdeg. Celsius\r\n", safety_adc_get_temp());
+	shellmatta_printf(handle, "TEMP:\t%8.2f\tdeg. Celsius\r\n", 25.0f);
 
-	shellmatta_printf(handle, "Errors:\t%X", safety_adc_get_errors());
+	shellmatta_printf(handle, "Errors:\t%X", 0);
-
-	return SHELLMATTA_OK;
-}
-
-static shellmatta_retCode_t shell_cmd_safety_adc_clear_error(const shellmatta_handle_t handle, const char *arguments,
-					  uint32_t length)
-{
-	(void)length;
-	(void)arguments;
-	(void)handle;
-
-	safety_adc_clear_errors();
 
 	return SHELLMATTA_OK;
 }
@@ -388,7 +376,7 @@ static shellmatta_retCode_t shell_cmd_safety_adc_clear_error(const shellmatta_ha
 //    struct shellmatta_cmd   *next;      /**< pointer to next command or NULL        */
 //} shellmatta_cmd_t;
 
-static shellmatta_cmd_t cmd[15] = {
+static shellmatta_cmd_t cmd[14] = {
 	{
 		.cmd = "version",
 		.cmdAlias = "ver",
@@ -499,17 +487,8 @@ static shellmatta_cmd_t cmd[15] = {
 		.helpText = "",
 		.usageText = "",
 		.cmdFct = shell_cmd_safety_adc,
-		.next = &cmd[14],
-	},
-	{
-		.cmd = "safety-adc-clear-error",
-		.cmdAlias = NULL,
-		.helpText = "",
-		.usageText = "",
-		.cmdFct = shell_cmd_safety_adc_clear_error,
 		.next = NULL,
 	},
-
 };
 
 shellmatta_handle_t shell_init(shellmatta_write_t write_func)