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10 years, 10 months ago.
how to send a buffer through CAN?
how to send a buffer through CAN?
1 Answer
10 years, 10 months ago.
You need a global variable, data[], then you put your CAN data into an array, and call it. The code below is just an example from my program.
t
if(Send_stuff == 27) {
data[0] = (char)(0x00); //EC1 status req
data[1] = (char)(0x00);
data[2] = (char)(0x00);
data[3] = (char)(0x00);
data[4] = (char)(0x00);
data[5] = (char)(0x01);
data[6] = (char)(0x00);
data[7] = (char)(0x00);
if(can2.write(CANMessage(EC_master_adress,data,6))) {}
Send_stuff = 0;
}
Of course you have to define the adress you are sending the data, and specify how many bytes of data to send. In my case, the EC_master_adress is defined in the header as #define EC_master_adres 0x40 and I need to send only 6 out of 8 bytes of data, but when doing copy/paste of blocks, is faster to copy the entire block. RGDS
To what? CAN frames can have up to 8 bytes of data but you would need to make some sense of them. CanOpen provides for more structured transmission.
posted by Ned Konz 15 Jun 2013