Important changes to forums and questions
All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.
10 years, 12 months ago.
CAN Hello World Example
Hello Mbed Team,
This is santhosh and im trying to work with the CAN code over here , im using 2 can tranceiver chips mcp 2551 and the bus is terminated with 250 ohm resistor and rs pin of the transceiver grounded but still unable to receive messages from the bus . I have attached the code ,snapshot from hyper terminal and connection schematic . please lemme know whether there's any mistake .
Expecting quick response from your side .
Can Tx code (Running on 1st board)
- include "mbed.h"
CAN can2(p30, p29);
char counter=0;
void send() {
if(can2.write(CANMessage(20, &counter, 1))) { printf("wloop()\n"); counter++; printf("\n Message sent: %d", counter); }
} int main() {
printf("main()\n");
while(1) {
send();
} }
CAN RX(Running on second board)
- include "mbed.h" CAN can2(p30, p29); int main() { CANMessage msg; while(1) {
if(can2.read(msg)) {
printf("\n Message received:%d", msg.data[0]);
wait(0.2); } }
}
Question relating to:
2 Answers
10 years, 12 months ago.
Check this page for some hints: http://mbed.org/forum/mbed/topic/4229/?page=1#comment-20991
10 years, 12 months ago.
Hi Mr Wim,
Sorry for the delay in responding , there was a problem in wiring and it was not reading the message .I rewired the whole circuit and its fixed .