Posted on May 15, 2014 at 11:18Hi,
We need to modify one of our existing company products to be able to be controller by external I/O. The only externally available I/O-signals are the 6 JTAG pins. These JTAG pins are connected to the PLD I/O-Port C. I would like to control pins PC3 and PC4. But somehow I do not managed to get them active.
These next items are applied:
- set PC3 and PC4 to GP I/O mode in PSDsoft Express
- set the CSIOP to address 0x7F00 in PSDsoft Express (last 256 Bytes of the 32KiB SRAM)
- set the PC3/PC4 data direction registers (at address 0x7F14) to '1' (output)
- toggle PC3/PC4 output registers (at address 0x7F12)
But nothing happens on the outputs. Testing them as inputs also shows no results.
Maybe I forgot some setting in the PSD part of the uC?
thanks,
Henk
