CAN Shield Issue

Hello

I am using a v1.0 CAN SHIELD attached to a UNO R3

using IDE 1.0.5, I have uploaded the receive_check program which compiles and uploads correctly. I don't have any other device to read the CAN off at this stage (long story which ill probably post in a separate thread).

When i try to upload the send program however, it will not compile. Nor will it compile in v1.0 of the IDE either.

The same message appears in both

"
// demo: CAN-BUS Shield, send data
#include <mcp_can.h>
#include <SPI.h>

MCP_CAN CAN(10); // Set CS to pin 10

void setup()
{
Serial.begin(115200);

START_INIT:

if(CAN_OK == CAN.begin(CAN_500KBPS)) // init can bus : baudrate = 500k
{
Serial.println("CAN BUS Shield init ok!");
}
else
{
Serial.println("CAN BUS Shield init fail");
Serial.println("Init CAN BUS Shield again");
delay(100);
goto START_INIT;
}
}

unsigned char stmp[8] = {0, 1, 2, 3, 4, 5, 6, 7};
void loop()
{
// send data: id = 0x00, standrad flame, data len = 8, stmp: data buf
CAN.sendMsgBuf(0x00, 0, 8, stmp);
delay(100); // send data per 100ms"

The error I get is this:

send.cpp: In function 'void loop()':
send:29: error: no matching function for call to 'MCP_CAN::sendMsgBuf(int, int, int, unsigned char [8])'
/Users/MH/Documents/Arduino/libraries/CAN_BUS_Shield_master/mcp_can.h:102: note: candidates are: byte MCP_CAN::sendMsgBuf(long unsigned int, byte, byte, byte, byte*)

Now I'm new to Arduino & programming, but am I right in thinking the IDE is telling me that function sendMsgBuf, needs to have five elements rather than the usual four for a can signal?

In testing this, the sketch compiles if I add an additional digit, for example:

CAN.sendMsgBuf(0x00, 0, 8, 0, stmp);

This then uploads fine, but the TX & RX red lights are on solid, and the serial monitor doesn't display anything apart from INIT OK, although i guess thats expected as nothing is telling stmp to print to serial.

Could anyone help with why the TX & RX lights are on solid, and how I could test that this board is actually outputting any signals once per second, back to the serial monitor?

Thanks

Statistics : Posted by matthew.hammond85 • on Sun Sep 14, 2014 3:52 am • Replies 1 • Views 46

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