Hello I bought a MCP2515 CAN shield and tried it with an arduino. But then i changed to an esp32 s3 because of power limitations on the arduino, it worked on the bench and i used the standard SPI pins of the esp32s3.

Now i have a mirkoe MCP2515 transceiver on a compatible esp32s3 dev board but this doesn't use the standard SPI pins I also tried it with the Seeduino shield and dupont wires. So im pretty sure my SPI bus doesn't get initialised on the correct pins.

I know that you probably aren't interested in helping as its not with the intended Hardware. But if you are Thanks a lot even for reading this.

I used this simple code to demonstrate my issue I also watched the Can Bus with PCAN view but obviously nothing happened. In the Serialcon i got a 1 for this line: Serial.println(CAN.begin(CAN_500KBPS)); and a lot of CAN init fail, retry...

Can you guys please help me as i wrote my whole VCU code with this library because it seemed intuitive to me.

Best regards

// demo: CAN-BUS Shield, send data // loovee@seeed.cc

include

include "mcp2515_can.h"

//Pinout

define SCK 4

define MOSI 6

define MISO 5

const int SPI_CS_PIN = 36; const int CAN_INT_PIN = 11; mcp2515_can CAN(SPI_CS_PIN); // Set CS pin

define MAX_DATA_SIZE 8

void setup() {

Serial.begin(115200); while(!Serial){}; Serial.println(CAN.begin(CAN_500KBPS)); while (CAN_OK != CAN.begin(CAN_500KBPS)) { // init can bus : baudrate = 500k Serial.println("CAN init fail, retry..."); delay(100); } Serial.println("CAN init ok!"); }

unsigned char stmp[8] = {0, 0, 0, 0, 0, 0, 0, 0}; void loop() { // send data: id = 0x00, standrad frame, data len = 8, stmp: data buf stmp[7] = stmp[7] + 1; if (stmp[7] == 100) { stmp[7] = 0; stmp[6] = stmp[6] + 1;

    if (stmp[6] == 100) {
        stmp[6] = 0;
        stmp[5] = stmp[5] + 1;
    }
}

CAN.sendMsgBuf(0x00, 0, 8, stmp);
delay(100);                       // send data per 100ms
Serial.println("CAN BUS sendMsgBuf ok!");

}

// END FILE

Seeed-Studio / Seeed_Arduino_CAN

MCP2515 init Fail #148