fixed some minor warnning messages and improved C++ compatibility

Author: hpsaturn

examples/esp32cam-p2p-sender/esp32cam-p2p-sender.cpp

@@ -41,7 +41,7 @@ void setup() {
   }
 
   // M5Core2 receiver target (P2P or 1:1 mode)
-  uint8_t macRecv[6] = {0xB8,0xF0,0x09,0xC6,0x0E,0xCC};
+  const uint8_t macRecv[6] = {0xB8,0xF0,0x09,0xC6,0x0E,0xCC};
   radio.setTarget(macRecv);
   radio.init();
 

examples/freenove-p2p-sender/freenove-p2p-sender.cpp

@@ -40,7 +40,7 @@ void setup() {
   }
 
   // M5Core2 receiver
-  uint8_t macRecv[6] = {0xB8,0xF0,0x09,0xC6,0x0E,0xCC};
+  const uint8_t macRecv[6] = {0xB8,0xF0,0x09,0xC6,0x0E,0xCC};
   radio.setTarget(macRecv);
   radio.init();
 

examples/m5core2-basic-receiver/m5core2-basic-receiver.ino

@@ -36,7 +36,7 @@ void setup() {
   }
 
   // BE CAREFUL WITH IT, IF JPG LEVEL CHANGES, INCREASE IT
-  fb = (uint8_t*)  ps_malloc(5000* sizeof( uint8_t ) ) ;
+  fb = static_cast<uint8_t *>(ps_malloc(5000 * sizeof(uint8_t)));
 
   radio.setRecvBuffer(fb);
   radio.setRecvCallback(onDataReady);

examples/m5core2-espnow-receiver/m5core2-espnow-receiver.cpp

@@ -36,7 +36,7 @@ void setup() {
   }
 
   // BE CAREFUL WITH IT, IF JPG LEVEL CHANGES, INCREASE IT
-  fb = (uint8_t *)ps_malloc(15000 * sizeof(uint8_t));
+  fb = static_cast<uint8_t*>(ps_malloc(15000 * sizeof(uint8_t)));
 
   radio.setRecvBuffer(fb);
   radio.setRecvCallback(onDataReady);

examples/m5cores3-espnow-receiver/m5cores3-espnow-receiver.cpp

@@ -23,7 +23,7 @@ static void print_FPS(int x, int y, const char *msg, uint32_t &frame, uint_fast6
   if (millis() - time_stamp > 1000) {
     time_stamp = millis();
     char output[40];
-    sprintf(output, "%s %2d FPS   JPG: %05d\r\n",msg, frame, len);
+    sprintf(output, "%s %2d FPS   JPG: %05d\r\n", msg, frame, len);
     // M5.Display.drawString(output, x, y);
     frame = 0;
     Serial.print(output);
@@ -53,7 +53,7 @@ void setup() {
   }
 
   // BE CAREFUL WITH IT, IF JPG LEVEL CHANGES, INCREASE IT
-  fb = (uint8_t *)ps_malloc(5000 * sizeof(uint8_t));
+  fb = static_cast<uint8_t *>(ps_malloc(5000 * sizeof(uint8_t)));
 
   radio.setRecvBuffer(fb);
   radio.setRecvCallback(onDataReady);

examples/multi-camera-one-receiver/m5core2-multi-receiver.cpp

@@ -41,13 +41,13 @@ void setup() {
   }
 
   // BE CAREFUL WITH IT, IF JPG LEVEL CHANGES, INCREASE IT
-  fb_camera1 = (uint8_t*)  ps_malloc(5000* sizeof( uint8_t ) ) ;
-  fb_camera2 = (uint8_t*)  ps_malloc(5000* sizeof( uint8_t ) ) ;
+  fb_camera1 = static_cast<uint8_t*>(ps_malloc(5000 * sizeof(uint8_t)));
+  fb_camera2 = static_cast<uint8_t*>(ps_malloc(5000 * sizeof(uint8_t)));
 
   // TJournal Camera  24:0a:c4:2f:8e:90
-  uint8_t camera1[6] = {0x24, 0x0A, 0xC4, 0x2F, 0x8E, 0x90};
+  const uint8_t camera1[6] = {0x24, 0x0A, 0xC4, 0x2F, 0x8E, 0x90};
   // XIAOSense Camera 74:4d:bd:81:4e:fc
-  uint8_t camera2[6] = {0x74, 0x4D, 0xBD, 0x81, 0x4E, 0xFC};
+  const uint8_t camera2[6] = {0x74, 0x4D, 0xBD, 0x81, 0x4E, 0xFC};
 
   radio.setRecvFilter(fb_camera1, camera1, onCamera1DataReady);
   radio.setRecvFilter(fb_camera2, camera2, onCamera2DataReady);

examples/multi-camera-one-receiver/m5cores3-camera1.cpp

@@ -13,7 +13,7 @@
 ESPNowCam radio;
 int32_t dw, dh;
 
-static void drawFPS() {
+static inline void drawFPS() {
   static uint_least64_t timeStamp = 0;
   frame++;
   if (millis() - timeStamp > 1000) {
@@ -58,7 +58,7 @@ void setup() {
   // M5Core2 receiver MAC: B8:F0:09:C6:0E:CC
   // uint8_t macRecv[6] = {0xB8,0xF0,0x09,0xC6,0x0E,0xCC};
   // Makerfabs receiver 7C:DF:A1:F3:73:3C
-  uint8_t macRecv[6] = {0x7C,0xDF,0xA1,0xF3,0x73,0x3C};
+  const uint8_t macRecv[6] = {0x7C,0xDF,0xA1,0xF3,0x73,0x3C};
 
   radio.setTarget(macRecv);
   radio.init();

examples/multi-camera-one-receiver/makerfabs-multi-receiver.cpp

@@ -85,16 +85,16 @@ void setup() {
   }
 
   // BE CAREFUL WITH IT, IF JPG LEVEL CHANGES, INCREASE IT
-  fb_camera1 = (uint8_t *)ps_malloc(20000 * sizeof(uint8_t));
-  fb_camera2 = (uint8_t *)ps_malloc(10000 * sizeof(uint8_t));
-  fb_camera3 = (uint8_t *)ps_malloc(10000 * sizeof(uint8_t));
+  fb_camera1 = static_cast<uint8_t*>(ps_malloc(20000 * sizeof(uint8_t)));
+  fb_camera2 = static_cast<uint8_t*>(ps_malloc(10000 * sizeof(uint8_t)));
+  fb_camera3 = static_cast<uint8_t*>(ps_malloc(10000 * sizeof(uint8_t)));
 
   // M5CoreS3 Camera  f4:12:fa:85:f4:9c
-  uint8_t camera1[6] = {0xF4, 0x12, 0xFA, 0x85, 0xF4, 0x9C};
+  const uint8_t camera1[6] = {0xF4, 0x12, 0xFA, 0x85, 0xF4, 0x9C};
   // TJournal Camera  24:0a:c4:2f:8e:90
-  uint8_t camera2[6] = {0x24, 0x0A, 0xC4, 0x2F, 0x8E, 0x90};
+  const uint8_t camera2[6] = {0x24, 0x0A, 0xC4, 0x2F, 0x8E, 0x90};
   // XIAOSense Camera 74:4d:bd:81:4e:fc
-  uint8_t camera3[6] = {0x74, 0x4D, 0xBD, 0x81, 0x4E, 0xFC};
+  const uint8_t camera3[6] = {0x74, 0x4D, 0xBD, 0x81, 0x4E, 0xFC};
 
   radio.setRecvFilter(fb_camera1, camera1, onCamera1DataReady);
   radio.setRecvFilter(fb_camera2, camera2, onCamera2DataReady);

src/ESPNowCam.cpp

@@ -24,7 +24,7 @@ size_t encodeMsg(Frame msg);
 bool encode_uint8_array(pb_ostream_t *stream, const pb_field_t *field, void *const *arg) {
   if (!pb_encode_tag_for_field(stream, field))
     return false;
-  return pb_encode_string(stream, (uint8_t *)(outdata + chunk_pos), chunk_size_left);
+  return pb_encode_string(stream, static_cast<uint8_t*>(outdata + chunk_pos), chunk_size_left);
 }
 
 void msgSentCb(const uint8_t *macAddr, esp_now_send_status_t  status) {
@@ -97,7 +97,7 @@ bool sendMessage(uint32_t msglen, const uint8_t *mac) {
   return false;
 }
 
-bool ESPNowCam::setTarget(uint8_t *macAddress) {
+bool ESPNowCam::setTarget(const uint8_t *macAddress) {
   memcpy(targetAddress, macAddress, 6);
   return false;
 }

src/ESPNowCam.h

@@ -24,7 +24,7 @@ class ESPNowCam {
   void setRecvBuffer(uint8_t *fb);
   void setRecvFilter(uint8_t *fb, const uint8_t *macAddr, RecvCb cb);
   bool sendData(uint8_t* data, uint32_t lenght);
-  bool setTarget(uint8_t* macAddress);
+  bool setTarget(const uint8_t* macAddress);
   bool init(uint8_t chunksize = 244);
 };