Maker Pro
Maker Pro

PIC programming



Jan 1, 1970
I'am trying to program a PIC-processor (18F452) with a icsp circuit
connected to the serial-port of a PC. I have written a program that
can program the code-memory and read the data-memory but not program
the data-memory. I'am following the description in the datasheet but I
get only one of the bytes programmed, with the wrong value.

I think that there can be something wrong the WR-bit check (the
datasheet p. 17). I don't understand how to check the WR-bit. Should
you read bits from the data-pin and abort when the bit is clear? I get
only 0xFF.

Do anyone have any suggestions?