First draft of safety controller

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

@@ -34,6 +34,7 @@ enum safety_flag {
 	ERR_FLAG_STACK = (1<<8),
 	ERR_FLAG_SAFETY_ADC = (1<<9),
 	ERR_FLAG_SYSTICK = (1<<10),
+	ERR_FLAG_WTCHDG_FIRED = (1<<11),
 };
 
 enum timing_monitor {

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

@@ -29,6 +29,7 @@
 
 #include <reflow-controller/safety/safety-config.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 enum analog_monitor_status {ANALOG_MONITOR_OK = 0,
 			    ANALOG_MONITOR_ERROR,
@@ -66,6 +67,8 @@ int safety_controller_get_flag(enum safety_flag flag, bool *status, bool try_ack
 
 int safety_controller_ack_flag(enum safety_flag flag);
 
+int safety_controller_ack_flag_with_key(enum safety_flag flag, uint32_t key);
+
 #endif /* __SAFETY_CONTROLLER_H__ */
 
 /** @} */

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

@@ -23,6 +23,7 @@
 
 #include <reflow-controller/safety/safety-config.h>
 #include <stdint.h>
+#include <stdbool.h>
 
 /**
  * @brief Setup the watchdog for the safety controller
@@ -39,5 +40,11 @@ int watchdog_setup(uint8_t prescaler);
  */
 int watchdog_ack(uint32_t magic);
 
+/**
+ * @brief Check if reset was generated by the watchdog.
+ * @note This also clears the relevant flag, so the function will reutrn false when called a second time
+ * @return
+ */
+bool watchdog_check_reset_source(void);
 
 #endif /* __WATCHDOG_H__ */