added the healthcheck command

src/communication/commands.h

@@ -12,6 +12,7 @@ typedef enum : uint8_t {
     CmdUpdateWinDims = 5, // NOTE: change this to a move cmd instead
     CmdUpdateWin = 6,
     CMDData = 7,
+    CMDHealthCheck = 9,
 } Command;
 
 char* CommandToStr(Command id);

src/communication/packets.cpp

@@ -24,3 +24,11 @@ void initWindowIDReply(WindowIDReply* pkt, int16_t id) {
   pkt->EndMarker = 0x03;
   pkt->wID = id;
 }
+
+void initHealthCheckReply(HealthCheckReply* pkt) {
+  memset(pkt, 0, sizeof(*pkt));
+
+  pkt->StartMarker = 0x02;
+  pkt->reply = 0x06;
+  pkt->EndMarker = 0x03;
+}

src/communication/packets.h

@@ -2,6 +2,7 @@
 #define __PACKETS__
 
 #include "UIDimensions.h"
+#include <cstdint>
 #include <stdint.h>
 
 typedef uint8_t PacketType;
@@ -36,4 +37,12 @@ struct __attribute__((packed)) WindowIDReply {
 
 void initWindowIDReply(WindowIDReply* pkt, int16_t id);
 
+struct __attribute__((packed)) HealthCheckReply {
+  uint8_t StartMarker;
+  uint8_t reply;
+  uint8_t EndMarker;
+};
+
+void initHealthCheckReply(HealthCheckReply* pkt);
+
 #endif

src/communication/walkieTalkie.cpp

@@ -21,11 +21,15 @@ namespace WalkieTalkie {
     resetBuffer();
   }
 
+  static inline bool validCmd(uint8_t* cmd) {
+    return !(*cmd == 0 || *cmd > CMDHealthCheck);
+  }
+
   static inline void RecvCMDRoutine(byte *b) {
     LOG_TRACE(F("Reading the command byte\n"));
 
     uint8_t cmdVal = Command(*b);
-    if (cmdVal == 0 || cmdVal > CMDData) {
+    if (!validCmd(&cmdVal)) {
       LOG_TRACE(F("Invalid CMD byte: 0x%02x. Resetting parser.\n"), cmdVal);
       ResetStateMachine();
       return;

src/main.cpp

@@ -133,28 +133,21 @@ void loop(void) {
       return;
     }
 
-    LOG_DEBUG(F("Command: %s\n"), CommandToStr(cmd));
+    LOG_WARN(F("Command: %s\r\n"), CommandToStr(cmd));
-    LOG_DEBUG(F("Response Payload Len: %d\n"), resp);
+    LOG_DEBUG(F("Response Payload Len: %d\r\n"), resp);
 
     // print_memory_stats();
   
-    // If its not connected the only command we can receive is the CmdRequestID
+    switch(cmd) {
-    if (!connected) {
+      case CmdRequestID:
-      if (cmd != CmdRequestID) {
-        return;
-      } 
-
-      // Handle the ID request, it should connect us. TODO: Improve this
         IdentificationPacket papers;
         initIdentificationPacket(&papers, ESLABS_DEVICE_NAME, ESLABS_DEVICE_ID); 
         WalkieTalkie::SendData(&papers);
 
-      LOG_INFO(F("Connection request came in"));
+        LOG_INFO(F("Connection request came in\r\n"));
+        LOG_INFO(F("Replied with something \r\n\n"));
 
-      connected = true;
+        break;
-
-    } else {
-      switch(cmd) {
       case CmdCreateWindow: {
         int8_t newWindowID = Window::Create(payload, &mainScreen);
         if (newWindowID < 0) {
@@ -224,6 +217,15 @@ void loop(void) {
 
         break;
       }
+      case CMDHealthCheck: {
+        LOG_INFO(F("HealthCheck request came in \r\n"));
+
+        HealthCheckReply packet;
+        initHealthCheckReply(&packet);
+        WalkieTalkie::SendData(&packet);
+
+        break;
+      }
       default:
         LOG_ERROR(F("Command: %s\n"), CommandToStr(cmd));
         LOG_ERROR(F("Unknown Command: `%02X` has not been implemented yet.\n"), cmd);
@@ -248,5 +250,4 @@ void loop(void) {
         break;
     }
   }
-  }
 }