How to find if chip has PPS for pin remapping

[nurquhar]

I have been working on modifying the CCS ex_usb_bootloader to work from eihter the USB port or one of the HW UART's. I also have it working at the top of memory so no need care about modifiying the app when using bootloader.

Its all working nicely with the 18F27J53 but I wanted a generic way of re-mapping the UART port pins if the device supports it. I was hoping to find a GETENV("PPS") option which would tell me if the chip support this. My V4.133 manual does't mention it.

Is there another way to do it, short of writing one realy long #IF-THEN-ELSE using the device number ? Perhaps its supported in later versions of PCH

[Ttelmah]

If the chip has a PPSCON register, then it supports at least some re-mappable pins.

getenv("SFR_VALID:PPSCON")

Best Wishes

[nurquhar]

Dear Ttelmah

Thanks, that works.

Interestingly SFR_VALID is not in my CCS help file. However I did find it in the PDF manual I just download from CCS.

[Ttelmah]

Yes, this has caught me in the past. The pdf is the 'latest' manual. The one with the compiler is a little older. Also remember that there are often updates to both in the 'readme' with the compiler.

Best Wishes