Add event for missing inverter, fix capping value

Software/src/devboard/utils/events.cpp

@@ -149,6 +149,7 @@ void init_events(void) {
   events.entries[EVENT_CANFD_RX_FAILURE].level = EVENT_LEVEL_ERROR;
   events.entries[EVENT_CAN_RX_WARNING].level = EVENT_LEVEL_WARNING;
   events.entries[EVENT_CAN_TX_FAILURE].level = EVENT_LEVEL_ERROR;
+  events.entries[EVENT_CAN_INVERTER_MISSING].level = EVENT_LEVEL_ERROR;
   events.entries[EVENT_WATER_INGRESS].level = EVENT_LEVEL_ERROR;
   events.entries[EVENT_CHARGE_LIMIT_EXCEEDED].level = EVENT_LEVEL_INFO;
   events.entries[EVENT_DISCHARGE_LIMIT_EXCEEDED].level = EVENT_LEVEL_INFO;
@@ -276,6 +277,8 @@ const char* get_event_message_string(EVENTS_ENUM_TYPE event) {
       return "ERROR: High amount of corrupted CAN messages detected. Check CAN wire shielding!";
     case EVENT_CAN_TX_FAILURE:
       return "ERROR: CAN messages failed to transmit, or no one on the bus to ACK the message!";
+    case EVENT_CAN_INVERTER_MISSING:
+      return "ERROR: Inverter missing on CAN bus! Check wiring!";
     case EVENT_CHARGE_LIMIT_EXCEEDED:
       return "Info: Inverter is charging faster than battery is allowing.";
     case EVENT_DISCHARGE_LIMIT_EXCEEDED:

Software/src/devboard/utils/events.h

@@ -6,7 +6,7 @@
 
 // #define INCLUDE_EVENTS_TEST  // Enable to run an event test loop, see events_test_on_target.cpp
 
-#define EE_MAGIC_HEADER_VALUE 0x0014  // 0x0000 to 0xFFFF
+#define EE_MAGIC_HEADER_VALUE 0x0015  // 0x0000 to 0xFFFF
 
 #define GENERATE_ENUM(ENUM) ENUM,
 #define GENERATE_STRING(STRING) #STRING,
@@ -35,6 +35,7 @@
   XX(EVENT_CANFD_RX_FAILURE)            \
   XX(EVENT_CAN_RX_WARNING)              \
   XX(EVENT_CAN_TX_FAILURE)              \
+  XX(EVENT_CAN_INVERTER_MISSING)        \
   XX(EVENT_CHARGE_LIMIT_EXCEEDED)       \
   XX(EVENT_DISCHARGE_LIMIT_EXCEEDED)    \
   XX(EVENT_WATER_INGRESS)               \

Software/src/inverter/FOXESS-CAN.cpp

@@ -27,6 +27,7 @@ static uint16_t voltage_per_pack = 0;
 static int16_t current_per_pack = 0;
 static uint8_t temperature_max_per_pack = 0;
 static uint8_t temperature_min_per_pack = 0;
+static uint8_t inverterStillAlive = CAN_STILL_ALIVE;
 
 static bool send_cellvoltages = false;
 static unsigned long previousMillisCellvoltage = 0;  // Store the last time a cellvoltage CAN messages were sent
@@ -354,7 +355,8 @@ CAN_frame FOXESS_0D59 = {.FD = false,
                          .ID = 0x0D59,  //Celltemperatures Pack 8
                          .data = {0x49, 0x48, 0x47, 0x47, 0x48, 0x49, 0x46, 0x47}};
 
-void update_values_can_inverter() {  //This function maps all the values fetched from battery CAN to the correct CAN messages
+void update_values_can_inverter() {  //This function maps all the CAN values fetched from battery. It also checks some safeties.
+
   //Calculate the required values
   temperature_average =
       ((datalayer.battery.status.temperature_max_dC + datalayer.battery.status.temperature_min_dC) / 2);
@@ -395,6 +397,24 @@ void update_values_can_inverter() {  //This function maps all the values fetched
     }
   }
 
+  //Cap the value according to user settings. Some inverters cannot handle large values.
+  if ((max_charge_rate_amp * 10) > datalayer.battery.info.max_charge_amp_dA) {
+    max_charge_rate_amp = (datalayer.battery.info.max_charge_amp_dA / 10);
+  }
+  if ((max_discharge_rate_amp * 10) > datalayer.battery.info.max_discharge_amp_dA) {
+    max_discharge_rate_amp = (datalayer.battery.info.max_discharge_amp_dA / 10);
+  }
+
+  if (inverterStillAlive > 0) {
+    inverterStillAlive--;
+  }
+
+  if (!inverterStillAlive) {
+    set_event(EVENT_CAN_INVERTER_MISSING, 0);
+  } else {
+    clear_event(EVENT_CAN_INVERTER_MISSING);
+  }
+
   //Put the values into the CAN messages
   //BMS_Limits
   FOXESS_1872.data.u8[0] = (uint8_t)datalayer.battery.info.max_design_voltage_dV;
@@ -692,6 +712,7 @@ void send_can_inverter() {  // This function loops as fast as possible
 void receive_can_inverter(CAN_frame rx_frame) {
 
   if (rx_frame.ID == 0x1871) {
+    inverterStillAlive = CAN_STILL_ALIVE;
     if (rx_frame.data.u8[0] == 0x03) {  //0x1871 [0x03, 0x06, 0x17, 0x05, 0x09, 0x09, 0x28, 0x22]
 //This message is sent by the inverter every '6' seconds (0.5s after the pack serial numbers)
 //and contains a timestamp in bytes 2-7 i.e. <YY>,<MM>,<DD>,<HH>,<mm>,<ss>