wip

panda/board/power_saving.h

@@ -0,0 +1,46 @@
+// WARNING: To stay in compliance with the SIL2 rules laid out in STM UM1840, we should never implement any of the available hardware low power modes.
+// See rule: CoU_3
+
+#define POWER_SAVE_STATUS_DISABLED 0
+#define POWER_SAVE_STATUS_ENABLED 1
+
+int power_save_status = POWER_SAVE_STATUS_DISABLED;
+
+void set_power_save_state(int state) {
+
+  bool is_valid_state = (state == POWER_SAVE_STATUS_ENABLED) || (state == POWER_SAVE_STATUS_DISABLED);
+  if (is_valid_state && (state != power_save_status)) {
+    bool enable = false;
+    if (state == POWER_SAVE_STATUS_ENABLED) {
+      print("enable power savings\n");
+
+      // Disable CAN interrupts
+      if (harness.status == HARNESS_STATUS_FLIPPED) {
+        llcan_irq_disable(cans[0]);
+      } else {
+        llcan_irq_disable(cans[2]);
+      }
+      llcan_irq_disable(cans[1]);
+    } else {
+      print("disable power savings\n");
+
+      if (harness.status == HARNESS_STATUS_FLIPPED) {
+        llcan_irq_enable(cans[0]);
+      } else {
+        llcan_irq_enable(cans[2]);
+      }
+      llcan_irq_enable(cans[1]);
+
+      enable = true;
+    }
+
+    current_board->enable_can_transceivers(enable);
+
+    // Switch off IR when in power saving
+    if(!enable){
+      current_board->set_ir_power(0U);
+    }
+
+    power_save_status = state;
+  }
+}