Read IMD M pin

Core/Inc/imd_monitoring.h

@@ -0,0 +1,36 @@
+#ifndef INC_IMD_MONITORING_H
+#define INC_IMD_MONITORING_H
+
+#include <stdint.h>
+
+#include "stm32f3xx_hal.h"
+
+typedef enum {
+  IMD_STATE_UNKNOWN,
+  IMD_STATE_SHORTCIRCUIT_SUPPLY,
+  IMD_STATE_SHORTCIRCUIT_GND,
+  IMD_STATE_NORMAL,
+  IMD_STATE_UNDERVOLTAGE,
+  IMD_STATE_SST,
+  IMD_STATE_DEV_ERROR,
+  IMD_STATE_GND_FAULT,
+} IMDState;
+
+typedef struct {
+  int ok;
+
+  IMDState state;
+  uint32_t r_iso;
+
+  uint32_t freq;
+  uint32_t duty_cycle;
+  uint32_t last_high;
+} IMDData;
+
+extern IMDData imd_data;
+
+void imd_init(TIM_HandleTypeDef *htim);
+
+void imd_update(void);
+
+#endif // INC_IMD_MONITORING_H

Core/Inc/main.h

@@ -61,6 +61,8 @@ void Error_Handler(void);
 #define HV_MISMATCH_ERR_GPIO_Port GPIOA
 #define RELAY_MISMATCH_ERR_Pin GPIO_PIN_1
 #define RELAY_MISMATCH_ERR_GPIO_Port GPIOA
+#define IMD_M_Pin GPIO_PIN_2
+#define IMD_M_GPIO_Port GPIOA
 #define IMD_OK_Pin GPIO_PIN_3
 #define IMD_OK_GPIO_Port GPIOA
 #define RELAY_CONNECTION_ERR_Pin GPIO_PIN_4

Core/Inc/stm32f3xx_it.h

@@ -56,6 +56,7 @@ void DebugMon_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
 void USB_LP_CAN_RX0_IRQHandler(void);
+void TIM1_BRK_TIM15_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */