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CANBUS-ChryslerRadio-125KBPS.ino
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CANBUS-ChryslerRadio-125KBPS.ino
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#include <CAN.h>
/*
* Darren Clark - [email protected]
* 2021.12.05
* Project to experiment with the Chrysler high speed CAN RES radio
* This radio uses CAN-B which is 125 kbps.
*
* Dependencies:
* CAN Library by Sandeep Mistry V 0.3.1
* https://github.com/sandeepmistry/arduino-CAN
*
*
* 1. On Arduino connect a 120 Ohm resistor from CAN-L to CAN-H.
* The CAN bus needs to be terminated, and a 120 Ohm resistor is good enough.
* 2. Connect radio ground to Arduino ground.
*/
volatile uint8_t timeH = 0, timeM = 0, timeS = 0; //The radio does not keep time, it only sets and displays time.
uint8_t keyState = 0x41; //initial state = key-in, accessory on
uint8_t lightsDriving = 0x02; //initial state = dash illuminated
uint8_t lightsDashIntensity = 0xC8; //initial state = max illimunation
String SerialRXBuffer = "";
bool SerialRXSpecial = false;
void setup()
{
//Set timer 1 to fire interrupt at 1HZ interval
noInterrupts();
TCCR1A = 0;
TCCR1B = 0;
OCR1A = 62500; // compare match register 16MHz/256
TCCR1B |= (1 << WGM12); // CTC mode
TCCR1B |= (1 << CS12); // 256 prescaler
TIMSK1 |= (1 << OCIE1A); // enable timer compare interrupt
interrupts();
Serial.begin(1000000);
CAN.setPins(10, 2);
CAN.setClockFrequency(8E6);
if (!CAN.begin(125E3)) //start the CAN bus at 125 kbps
{
Serial.println("Starting CAN0 failed!");
while (1);
}
//CAN.filter(0x3D0); //turn off filter and capture everything.
CAN.onReceive(onCANReceive);
Serial.println("FCA Radio Tool");
}
ISR(TIMER1_COMPA_vect)
{
timeS++;
if (timeS > 59)
{
timeS = 0;
timeM++;
}
if (timeM > 59)
{
timeM = 0;
timeH++;
}
if (timeH > 23)
timeH = 0;
}
void loop()
{
for (uint16_t y = 0; y < 900; y++) //~900mS delay while checking serial.
{
delay(1);
checkSerial();
}
if ( keyState != 0x00 )
{
canSend(0x20B, keyState, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5); //Key Position - 00 = no key, 01 = key in, 21 = accessory, 81 = run, A1 = start
canSend(0x219, 3, 131, 0, 192, 16, 44, 8, 0); delay(5); //VIN - This needs to be here to keep the radio on or else it will shutoff after ~15 seconds
canSend(0x208, lightsDriving, lightsDashIntensity, 0x00, 0x00, 0x00, 0x00); delay(5); //Illumination information B0 = driving lights (0,1,2,3), B1 = dash intensity (00-C8)
canSend(0x3E6, timeH, timeM, timeS); delay(5); //Clock data, if this isn't here radio returns "no clock"
canSend(0x3A3,0x0,0x0,0x0,0x0,0x0,0x0); //Steering wheel buttons for radio
canSend(0x21F,0x1,0x0,0x50,0x0,0x0,0x0,0x0,0x40); //Unknonw, but necessary
}
}
void onCANReceive(int packetSize)
{
if (CAN.packetRtr())
{
Serial.print("RTR ID 0x");
Serial.print(CAN.packetId(), HEX);
Serial.print(" Requested Length ");
Serial.println(CAN.packetDlc());
return;
}
uint8_t parameters[8];
uint32_t packetID = CAN.packetId();
for (uint8_t x = 0; x < packetSize; x++)
parameters[x] = CAN.read();
switch (packetID)
{
case 0x293:
Serial.print("0x293 Display1 - Mode: ");
if (parameters[0] == 0) Serial.print("ON");
if (parameters[0] == 0x10) Serial.print("Standby");
Serial.print(" Frequency/Track: "); Serial.print((float)(parameters[1] * 256.0 + parameters[2]) / 10.0, 1);
Serial.print(" Preset: "); Serial.print( 0x0F & parameters[3]);
if (parameters[4] == 0x02)
Serial.print(" CD: Inserted ");
else
Serial.print(" CD: Empty ");
Serial.print(" CD-H: "); Serial.print(parameters[5]);
Serial.print(" CD-M: "); Serial.print(parameters[6]);
Serial.print(" CD-S: "); Serial.println(parameters[7]);
break;
case 0x291:
Serial.print("0x291 Display2 - Mode: ");
if (parameters[0] == 0x00) Serial.print("AM ");
if (parameters[0] == 0x01) Serial.print("FM ");
if (parameters[0] == 0x1D) Serial.print("Standby ");
if (parameters[0] == 0x04) Serial.print("CD ");
if (parameters[0] == 0x06) Serial.print("AUX ");
Serial.print("CD: ");
if (parameters[1] == 0x01) Serial.print("Standby ");
if (parameters[1] == 0x03) Serial.print("Playing ");
if (parameters[1] == 0x0D) Serial.print("Empty ");
Serial.print("Source: ");
if (parameters[2] == 0x03) Serial.print("AUX ");
if (parameters[2] == 0x05) Serial.print("Radio ");
Serial.print("AMP: ");
if (parameters[4] == 0x00) Serial.println("OFF ");
if (parameters[4] == 0x10) Serial.println("ON ");
if (parameters[4] == 0x80) Serial.println("Mute ");
break;
case 0x3D9:
Serial.print("0x3D9 Settings - Volume: "); Serial.print(parameters[0]);
Serial.print(" Balance: "); Serial.print(parameters[1]);
Serial.print(" Fader: "); Serial.print(parameters[2]);
Serial.print(" Bass: "); Serial.print(parameters[3]);
Serial.print(" Mid: "); Serial.print(parameters[4]);
Serial.print(" Treble: "); Serial.print(parameters[5]);
Serial.print(" UNK: "); Serial.println(parameters[6]);
break;
case 0x2E9:
if ( (parameters[0] & 0x0F) == 0x03 )
{
timeH = parameters[1];
timeM = parameters[2];
timeS = 0;
Serial.print("0x2E9 B[0]= "); Serial.print(parameters[0], HEX); Serial.print(" SetTime - H: "); Serial.print(timeH); Serial.print(" M: "); Serial.print(timeM); Serial.print(" S: "); Serial.println(timeS);
}
break;
case 0x416:
Serial.print("0x416 Status: "); Serial.print(parameters[0]);
Serial.print(" : "); Serial.print(parameters[1]);
Serial.print(" : "); Serial.print(parameters[2]);
Serial.print(" : "); Serial.print(parameters[3]);
Serial.print(" : "); Serial.print(parameters[4]);
Serial.print(" : "); Serial.print(parameters[5]);
Serial.print(" : "); Serial.print(parameters[6]);
Serial.print(" : "); Serial.println(parameters[7]);
break;
default:
//Output information from unexpected packets
Serial.print("0x");
Serial.print(packetID, HEX);
Serial.print(" defaulted-ID size: ");
Serial.print(packetSize);
for (uint8_t x = 0; x < packetSize; x++)
{
Serial.print(" 0x"); Serial.print(parameters[x], HEX);
}
Serial.println();
}
}
void checkSerial()
{
if (Serial.available())
{
char RX = Serial.read();
if (!SerialRXSpecial)
{
if ( RX == 'I' || RX == 'i' ) //power on
{
keyState = 0x41;
canSend(0x20B, keyState, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'O' || RX == 'o' ) //power off
{
keyState = 0x00;
canSend(0x20B, keyState, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if (RX == '+') //volume up
{
canSend(0x3A3, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if (RX == '-') //volume down
{
canSend(0x3A3, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'U' || RX == 'u' ) //scan up
{
canSend(0x3A3, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'D' || RX == 'd' ) //scan down
{
canSend(0x3A3, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'B' || RX == 'b' ) //switch bands
{
canSend(0x3A3, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'P' || RX == 'p' ) //preset increase
{
canSend(0x3A3, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'R' || RX == 'r' ) //preset decrease
{
canSend(0x3A3, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00); delay(50);
canSend(0x3A3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); delay(5);
}
if ( RX == 'T' || RX == 't' ) //set time
{
SerialRXBuffer = RX;
SerialRXSpecial = true;
}
}
else
{
SerialRXBuffer += RX;
if (SerialRXBuffer.length() >= 5)
{
String tempVal = "";
char tempArray[8];
tempVal = SerialRXBuffer.substring(1,3);
tempVal.toCharArray(tempArray,sizeof(tempArray));
timeH = atol(tempArray);
tempVal = SerialRXBuffer.substring(3,5);
tempVal.toCharArray(tempArray,sizeof(tempArray));
timeM = atol(tempArray);
SerialRXBuffer = "";
SerialRXSpecial = false;
}
}
}
}
//helper functions...
void canSend(uint32_t ID, uint8_t b0)
{
uint8_t b[1];
b[0] = b0;
canTX(1, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1)
{
uint8_t b[2];
b[0] = b0; b[1] = b1;
canTX(2, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2)
{
uint8_t b[3];
b[0] = b0; b[1] = b1; b[2] = b2;
canTX(3, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3)
{
uint8_t b[4];
b[0] = b0; b[1] = b1; b[2] = b2; b[3] = b3;
canTX(4, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4)
{
uint8_t b[5];
b[0] = b0; b[1] = b1; b[2] = b2; b[3] = b3; b[4] = b4;
canTX(5, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5)
{
uint8_t b[6];
b[0] = b0; b[1] = b1; b[2] = b2; b[3] = b3; b[4] = b4; b[5] = b5;
canTX(6, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5, uint8_t b6)
{
uint8_t b[7];
b[0] = b0; b[1] = b1; b[2] = b2; b[3] = b3; b[4] = b4; b[5] = b5; b[6] = b6;
canTX(7, ID, b);
}
void canSend(uint32_t ID, uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5, uint8_t b6, uint8_t b7)
{
uint8_t b[8];
b[0] = b0; b[1] = b1; b[2] = b2; b[3] = b3; b[4] = b4; b[5] = b5; b[6] = b6; b[7] = b7;
canTX(8, ID, b);
}
void canTX(uint8_t packetSize, uint32_t ID, uint8_t b[])
{
CAN.beginPacket(ID, packetSize);
CAN.write(b, packetSize);
CAN.endPacket();
}