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Thanks! I guess it helps to look at the device specific header file for the interrupts missing from the documentation. Looks like there are all kinds of nicely supported CAN interrupts in there. I ...

I have been fooling with CAN bus. I finally have some nice test programs written, that work well.

I am stuck trying to build an interrupt driven receive.....what is the easiest way to process the ...

I have an application that needs to do alot of floating point calculations, and the round-off and truncation error is killing it. By the time the calcs are done I get the wrong answer completely.

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Anyone know where I can find some 'C' source for a sine function that uses a larger lookup table for more accurate results? I am using the sin function built-into the CCS C compiler, and the results ...

Ok....CCS tech support replied with an answer to the problem. I thought I would post my results, so the next guy who has the same trouble will know what to do.

LOADER_SIZE is incorrect for the PCH ...

Those are ram based and the problem you are having is rom shortage. sometimes moving variables around reduces the code size due to the bank switching instructions.

That is what I thought too. Alt ...

Whew!

After lots of looking at the list file, and breaking things up more....still no luck. Then, I started commenting things out until it would compile.

I isolated the problem to the following ...

I used the CCS bootloader sample, loader.c to make a simple boot loader for a PIC18F252. It seems to work very well when working with a toy/example program.

I went and tried to retrofit an existin ...

Do a test where you send only one byte and then stop (simulating some sort of error). Then try and do a correct sequence. I believe that you will find their state machine gets trashed! That is why ...

CCS tech support just sent me the following code.
It works very well. My problem is now solved. You can send 2 bytes up, and get 2 bytes back, with a 1 byte address...although it would be easy to e ...

One other thing, does SLAVE_ADDR == MOTORBOARD? If not, that will also be a problem.

Yes...they are the same. Thanks for the reply!

After LOTs of fiddling with the ex_slave.c code, I was able ...

I am really starting to get frustrated....

After fiddling with this problem for 2 days straight now....I am getting the feeling that the #use i2c stuff in the compiler doesn't work properly for bui ...

I have been trying to write a simple I2C master/slave communications program, and I am having all kinds of difficulties.

Both are PIC18F252's. I am on CCS PCH 3.155.
I am using the hardware I2C, ...