clearpilot: initial commit of full source

panda/board/drivers/simple_watchdog.h

@@ -0,0 +1,26 @@
+typedef struct simple_watchdog_state_t {
+  uint32_t fault;
+  uint32_t last_ts;
+  uint32_t threshold;
+} simple_watchdog_state_t;
+
+simple_watchdog_state_t wd_state;
+
+
+void simple_watchdog_kick(void) {
+  uint32_t ts = microsecond_timer_get();
+
+  uint32_t et = get_ts_elapsed(ts, wd_state.last_ts);
+  if (et > wd_state.threshold) {
+    print("WD timeout 0x"); puth(et); print("\n");
+    fault_occurred(wd_state.fault);
+  }
+
+  wd_state.last_ts = ts;
+}
+
+void simple_watchdog_init(uint32_t fault, uint32_t threshold) {
+  wd_state.fault = fault;
+  wd_state.threshold = threshold;
+  wd_state.last_ts = microsecond_timer_get();
+}