WLED/wled00/wled_serial.cpp

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#include "wled.h"
/*
* Adalight and TPM2 handler
*/
enum class AdaState {
Header_A,
Header_d,
Header_a,
Header_CountHi,
Header_CountLo,
Header_CountCheck,
Data_Red,
Data_Green,
Data_Blue,
TPM2_Header_Type,
TPM2_Header_CountHi,
TPM2_Header_CountLo,
};
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uint16_t currentBaud = 1152; //default baudrate 115200 (divided by 100)
bool continuousSendLED = false;
uint32_t lastUpdate = 0;
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void updateBaudRate(uint32_t rate){
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uint16_t rate100 = rate/100;
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if (rate100 == currentBaud || rate100 < 96) return;
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currentBaud = rate100;
if (!pinManager.isPinAllocated(hardwareTX) || pinManager.getPinOwner(hardwareTX) == PinOwner::DebugOut){
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Serial.print(F("Baud is now ")); Serial.println(rate);
}
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Serial.flush();
Serial.begin(rate);
}
// RGB LED data return as JSON array. Slow, but easy to use on the other end.
void sendJSON(){
if (!pinManager.isPinAllocated(hardwareTX) || pinManager.getPinOwner(hardwareTX) == PinOwner::DebugOut) {
uint16_t used = strip.getLengthTotal();
Serial.write('[');
for (uint16_t i=0; i<used; i++) {
Serial.print(strip.getPixelColor(i));
if (i != used-1) Serial.write(',');
}
Serial.println("]");
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}
}
// RGB LED data returned as bytes in TPM2 format. Faster, and slightly less easy to use on the other end.
void sendBytes(){
if (!pinManager.isPinAllocated(hardwareTX) || pinManager.getPinOwner(hardwareTX) == PinOwner::DebugOut) {
Serial.write(0xC9); Serial.write(0xDA);
uint16_t used = strip.getLengthTotal();
uint16_t len = used*3;
Serial.write(highByte(len));
Serial.write(lowByte(len));
for (uint16_t i=0; i < used; i++) {
uint32_t c = strip.getPixelColor(i);
Serial.write(qadd8(W(c), R(c))); //R, add white channel to RGB channels as a simple RGBW -> RGB map
Serial.write(qadd8(W(c), G(c))); //G
Serial.write(qadd8(W(c), B(c))); //B
}
Serial.write(0x36); Serial.write('\n');
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}
}
void handleSerial()
{
if (pinManager.isPinAllocated(hardwareRX)) return;
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if (!Serial) return; // arduino docs: `if (Serial)` indicates whether or not the USB CDC serial connection is open. For all non-USB CDC ports, this will always return true
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#ifdef WLED_ENABLE_ADALIGHT
static auto state = AdaState::Header_A;
static uint16_t count = 0;
static uint16_t pixel = 0;
static byte check = 0x00;
static byte red = 0x00;
static byte green = 0x00;
while (Serial.available() > 0)
{
yield();
byte next = Serial.peek();
switch (state) {
case AdaState::Header_A:
if (next == 'A') state = AdaState::Header_d;
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else if (next == 0xC9) { //TPM2 start byte
state = AdaState::TPM2_Header_Type;
}
else if (next == 'I') {
handleImprovPacket();
return;
} else if (next == 'v') {
Serial.print("WLED"); Serial.write(' '); Serial.println(VERSION);
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} else if (next == 0xB0) {updateBaudRate( 115200);
} else if (next == 0xB1) {updateBaudRate( 230400);
} else if (next == 0xB2) {updateBaudRate( 460800);
} else if (next == 0xB3) {updateBaudRate( 500000);
} else if (next == 0xB4) {updateBaudRate( 576000);
} else if (next == 0xB5) {updateBaudRate( 921600);
} else if (next == 0xB6) {updateBaudRate(1000000);
} else if (next == 0xB7) {updateBaudRate(1500000);
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} else if (next == 'l') {sendJSON(); // Send LED data as JSON Array
} else if (next == 'L') {sendBytes(); // Send LED data as TPM2 Data Packet
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} else if (next == 'o') {continuousSendLED = false; // Disable Continuous Serial Streaming
} else if (next == 'O') {continuousSendLED = true; // Enable Continuous Serial Streaming
} else if (next == '{') { //JSON API
bool verboseResponse = false;
if (!requestJSONBufferLock(16)) return;
Serial.setTimeout(100);
DeserializationError error = deserializeJson(doc, Serial);
if (error) {
releaseJSONBufferLock();
return;
}
verboseResponse = deserializeState(doc.as<JsonObject>());
//only send response if TX pin is unused for other purposes
if (verboseResponse && (!pinManager.isPinAllocated(hardwareTX) || pinManager.getPinOwner(hardwareTX) == PinOwner::DebugOut)) {
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doc.clear();
JsonObject state = doc.createNestedObject("state");
serializeState(state);
JsonObject info = doc.createNestedObject("info");
serializeInfo(info);
serializeJson(doc, Serial);
Serial.println();
}
releaseJSONBufferLock();
}
break;
case AdaState::Header_d:
if (next == 'd') state = AdaState::Header_a;
else state = AdaState::Header_A;
break;
case AdaState::Header_a:
if (next == 'a') state = AdaState::Header_CountHi;
else state = AdaState::Header_A;
break;
case AdaState::Header_CountHi:
pixel = 0;
count = next * 0x100;
check = next;
state = AdaState::Header_CountLo;
break;
case AdaState::Header_CountLo:
count += next + 1;
check = check ^ next ^ 0x55;
state = AdaState::Header_CountCheck;
break;
case AdaState::Header_CountCheck:
if (check == next) state = AdaState::Data_Red;
else state = AdaState::Header_A;
break;
case AdaState::TPM2_Header_Type:
state = AdaState::Header_A; //(unsupported) TPM2 command or invalid type
if (next == 0xDA) state = AdaState::TPM2_Header_CountHi; //TPM2 data
else if (next == 0xAA) Serial.write(0xAC); //TPM2 ping
break;
case AdaState::TPM2_Header_CountHi:
pixel = 0;
count = (next * 0x100) /3;
state = AdaState::TPM2_Header_CountLo;
break;
case AdaState::TPM2_Header_CountLo:
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count += next /3;
state = AdaState::Data_Red;
break;
case AdaState::Data_Red:
red = next;
state = AdaState::Data_Green;
break;
case AdaState::Data_Green:
green = next;
state = AdaState::Data_Blue;
break;
case AdaState::Data_Blue:
byte blue = next;
if (!realtimeOverride) setRealtimePixel(pixel++, red, green, blue, 0);
if (--count > 0) state = AdaState::Data_Red;
else {
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realtimeLock(realtimeTimeoutMs, REALTIME_MODE_ADALIGHT);
if (!realtimeOverride) strip.show();
state = AdaState::Header_A;
}
break;
}
// All other received bytes will disable Continuous Serial Streaming
if (continuousSendLED && next != 'O'){
continuousSendLED = false;
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}
Serial.read(); //discard the byte
}
#endif
// If Continuous Serial Streaming is enabled, send new LED data as bytes
if (continuousSendLED && (lastUpdate != strip.getLastShow())){
sendBytes();
lastUpdate = strip.getLastShow();
}
}