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As it turns out, I was looking in the wrong place. The fault was in my USB bootloader. When I compiled for standalone operation and burned the chip, it worked as designed. I needed to re-compile th ...

I'm having a devil of a time tracking down a problem here.

I've got one board with a PIC18F26J50, code written with PICC 5.025. It's an existing product, works fine. I'm trying to get it to talk ...

Awesome idea -- thanks. That will work.

I have a common source code file that I use for two different products. I use #if/#endif to make whatever changes are needed due to hardware differences, but the base firmware functions the same on b ...

The one basic question I have is that the "ccsload" program offered by CCS has a "read from chip" option which reads the hex file as written on to the PIC.

Anyone can download c ...

Are you completely bound to the 12F675? The 12F1822 is a FAR more capable chip, pin compatible, is actually a little cheaper in quantity, and has a hardware EUSART in addition to many, many other imp ...

How about a device whose UART pins I can MOVE at will? Bingo. 16F1827/1847.There are even more PICs that can do this than the two models you reference here.

I'm surprised you consider changing pr ...

Worth saying that the 'historic' rate for NME GPS strings is 4800bps.
Look up NMEA 0183.
Running at the lower rate, means you can do things slower (interrupt at lower frequency on the example given ...

Thanks for the input, guys.

So here's the deal. One serial interface connects to another PIC based device on another board, and that link needs to be reliable, as in hardware UART.

The seco ...

Yes, I did.

Thanks for the reply. I had thought of that -- a separate stream for each baudrate -- but it would mean that every fprintf() would need to be duplicated with if() or case() wrapped around each one. ...

yeah... I've given up waiting for CCS to come through with a USB host stack. As much as I hate using the Vinculum device I see no other viable option. They are OK for simple jobs, but a little bugg ...

Is it possible to set or change the baud rate of a software UART at run time?

I've got a design that uses two serial ports, but the chip has only one hardware EUSART (it's a 16F1459). I'd like to ...

I've been using an ICD-U64 for a while now, and really like the hands-free programming mode when I have to burn a large number of chips. When my U64 needed repair, I decided to bit the bullet and buy ...

I have just got the "ex_usb_bootloader" example working on the PIC18F27J53. I guess it works the same way as the serial bootloader "ex_bootloader".

With regard to the discussio ...