Search found 17 matches

I am wondering about the best way to protect my firmware from being read out by someone with access to the PIC's ICSP electrical connections.

I adapted the CCS bootloader example to use an FTDI dev ...

I should also mention that although I have a working solution, I still can't figure our why one of these methods works and the other does not:

This method does not work (program gets stuck in the w ...

Collin,

Your suggestion worked. I wasn't able to mod the can_putd() function using a polling while loop - it would always get stuck there.

I used a tbe define as you suggested and placed an if a ...

Collin,

Your response makes perfect sense to me. I will try it and let you all know how it goes.

Do you see any issues with using your suggestion in a slightly different manner:

- Add the fol ...

PCM,

I will prepare and post some test code and a brief description of the hardware set-up, as you suggested.

I have not tried any other ECAN enabled PICs. In fact, this one works quite well (bo ...

If I move the while statement after this line
CANCON.win=CAN_WIN_RX0;

I don't get stuck in the loop, but I am not sure if it's doing what I need it to do which is sit and wait for the current tran ...

I now see that Microchip's datasheet on Page 289 shows a different sending method that uses WIN bits and I see that the can_putd() function uses this approach. From this, it's clear why some register ...

I'm using a PIC18F4685 (running at 40MHz) to send 256 CAN frames to another device on the CanBUS. The way the send routine works is that a loop runs 256 times calling the can_put() function each time. ...

I’m wondering if any of you guys have a good suggestion on how to “linearize” the parsing of a 2D lookup table (i.e. array).

I have a program that puts out a duty cycle determined by an ADC r ...

Andrew,

THANK YOU VERY MUCH for that excellent explanation.

I still had a bit of trouble figuring out why it wasn't working even after implementing your suggestion. The reason was that (unless ...

I am wondering if anyone has successfully set up a filtering scheme whereby a range of IDs are allowed through.

Using this code I am able to filter out all but the two specified IDs (100 and 200) b ...

Hello,

I am trying to use the bootloader functionality for the first time, but I am having little luck with it.

Since I couldn't make heads or tails of the ex_bootloader.c / ex_bootload.c in the ...

Ttelmah,

Thanks for taking a look at my code. The code you replied with works great. I will try to re-write my send function, as suggested, with a flag that removes the need to disable any interrup ...

I have a PIC18F4685 that communicates over a half-duplex RS232-type bus. The bus itself is a single wire that switches from GND to 24V using an open collector and a pull-up. The IC that handles the el ...

PCM,

That's exactly what the problem was. I've been staring at this code for three days before deciding to post a question.

Almost embarrassed about the solution...

Thanks for all your help.