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Hey PCM

Thanks for the step in the right direction. Can you do me a favor when you get a chance and see if you can see canbus output messages on the TX pin of the first MCU when you send it an RS23 ...

1. Here is the canbus related part of the circuit:
http://img576.imageshack.us/i/shadowcanbus.png/

2. My company recently purchased the ccs compiler so i hope its up to date. version 4.112

I r ...

So it turns out the output signal tx, from the mcu, I was seeing was nothing but the mcu resetting itself many times over again.

Heres a picture of what I was seeing when I used the below code
htt ...

Update: So with the RX and TX pins detached I managed to get the mcu to output a signal but only briefly. The signal seems to always be the same no matter what I set the ID and data to be. Its a low t ...

The CANH line does have an inverted signal on it. I checked with the scope and its there its just too small of a swing to be picked up by the logic analyzer. Also there seems to be no propagation to t ...

I disconnected the transceiver TX and RX lines from the pic. when i run my program, i get RS232 outputs every time i call the can_putd function. however, there is still no output on the can TX line of ...

I didn't look at your program too much. But check the hardware on your
board. The TJA1040 CAN bus transceiver chip has a Standby input which
has an internal pull-up on it. If this pin is left floa ...

Oh yea and I had to change can_set_mode so that I wouldn't get stuck in the while loop when I told it to go into loopback mode:

void can_set_mode(CAN_OP_MODE mode) {

set_tris_b ...

Hello fellow thinkers...

I'm currently working on a project to which uses a pre-built board we designed in house. The board has a PIC184580 mcu connected to a TJa1040 canbus transceiver chip. I kno ...