UNO R3 and CAN BUS SHIELD V2

Products & Technology Shields
#1

Hello, i am using v2 with uno r3.

Here is my code:

#include "Config.h"

#include "Components/Can.h"

#include "mcp2515_can.h"

mcp2515_can CAN(9);

namespace ii::blackbox::components {

unsigned char len = 0;
unsigned char buf[8];
char str[20];

void Can::SetUp() {
	while (CAN.begin(CAN_500KBPS) != 0) {
#ifdef SERIAL_DEBUG
		SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
#endif
		delay(100);
	}

	CAN.setMode(MODE_NORMAL);

#ifdef SERIAL_DEBUG
	SERIAL_PORT_MONITOR.println("CAN init OK.");
#endif

	unsigned char stmp[8] = {0x02, 0x90, 0x02, 0, 0, 0, 0, 0};

	for (size_t i = 0; i < 10; i++) {
		auto send = CAN.sendMsgBuf(0x7DF, 0, 8, stmp);
		if (send == CAN_OK) {
			SERIAL_PORT_MONITOR.println("CAN send OK.");
		}
		else {
			SERIAL_PORT_MONITOR.println("CAN send fail.");
		}
	}
}

void Can::Loop() {
	while (CAN_MSGAVAIL == CAN.checkReceive()) {
		// read data,  len: data length, buf: data buf
		CAN.readMsgBuf(&len, buf);

		for (int i = 0; i < len; i++) {
			SERIAL_PORT_MONITOR.print(buf[i]);
			SERIAL_PORT_MONITOR.print(",");

			m_logger.Log(g_logFileName, buf[i]);
		}
		SERIAL_PORT_MONITOR.println();
		SERIAL_PORT_MONITOR.println("----");
		m_logger.Log(g_logFileName, "\n");
	}
}

} // namespace ii::blackbox::components

Loop back mode works as expected, but normal mode outputs:
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.
CAN send fail.

Also i cutted P1 at all and desoldered the R3. I am testing with car ( w204 ) and PCAN-USB FD. Both of them not works. Am connecting PCAN FD cable or car by DB9.