speeduino to jeep cluster

[gsune]

Hi i have done my own version of speeduino jeep plug & play and i would like to comunicate it with the instruments cluster, i already have the ccd transeiver 300.
i would appreciate any help starting with the conections betwin the speeduino mega 2560 and any other processor you recommend to use with you code...
thanks

[laszlodaniel]

Hello, the Mega2560 is a good starting point since CCDLibrary is based on this MCU. First of all install this linked library and include it in your Arduino project.

Wiring between Mega, CCDBusTransceiver_V300 and Jeep cluster is detailed at the bottom of the README page.

If you are doing tests on your bench then you need 3 resistors to terminate and bias the CCD-bus network:

Normally bus termination and bias is done by the BCM (Body Control Module) when the cluster is installed in your car, so no additional resistors are necessary in that case.

To start things off check out the CCDMonitor example and copy instructions from the setup() function to your Arduino project to initialize the transceiver board.

The loop() function in this example is intentionally left empty because the library uses callbacks to selected functions instead of time-wasting polling.

Skip the TBEN pin configuration, you don't need to define it either.

All of this leaves you with this piece of code:

#include <CCDLibrary.h>

[...]

void CCDMessageReceived(uint8_t* message, uint8_t messageLength)
{
    for (uint8_t i = 0; i < messageLength; i++)
    {
        if (message[i] < 16) Serial.print("0"); // print leading zero
        Serial.print(message[i], HEX); // print message byte in hexadecimal format on the serial monitor
        Serial.print(" "); // insert whitespace between bytes
    }

    Serial.println(); // add new line
}

void CCDHandleError(CCD_Operations op, CCD_Errors err)
{
    if (err == CCD_OK) return;

    String s = op == CCD_Read ? "READ " : "WRITE ";

    switch (err)
    {
        case CCD_ERR_BUS_IS_BUSY:
        {
            Serial.println(s + "CCD_ERR_BUS_IS_BUSY");
            break;
        }
        case CCD_ERR_BUS_ERROR:
        {
            Serial.println(s + "CCD_ERR_BUS_ERROR");
            break;
        }
        case CCD_ERR_ARBITRATION_LOST:
        {
            Serial.println(s + "CCD_ERR_ARBITRATION_LOST");
            break;
        }
        case CCD_ERR_CHECKSUM:
        {
            Serial.println(s + "CCD_ERR_CHECKSUM");
            break;
        }
        default: // unknown error
        {
            Serial.println(s + "ERR: " + String(err, HEX));
            break;
        }
    }
}

void setup()
{
    [...]
    CCD.onMessageReceived(CCDMessageReceived);
    CCD.onError(CCDHandleError);
    CCD.begin(CCD_DEFAULT_SPEED, CUSTOM_TRANSCEIVER, IDLE_BITS_10, ENABLE_RX_CHECKSUM, ENABLE_TX_CHECKSUM);
}

void loop()
{
    [...]
}

Now if everything checks out you should see a few status messages received from the cluster:

3A 22 10 6C <- current lamp state
DA 60 3A    <- current lamp state
23 14 09 40 <- country code

To be able to interact with the cluster and light up lamps or move gauges you need to write messages to the cluster via CCD-bus. To do this check out the CCDWrite example.

Your cluster might not be sensitive to the 2 messages provided in the example (CCD ID 24 and E4). In that case a unified message is used to control all cluster gauges and some lamps (CCD ID 94).

[gsune]

[gsune]

thanks you,