i have an circuit with an AD8108. It will use in parallel mode programming. i've wrote a little program to see if it working, but it doesn't work.
This sofware is written in bascom. Here is the code:
Set Adce Set Adclk 'clk from ad8108 at high Set Adupdate 'Update from ad8108 at high Set Adserpar 'Parallel Programmierung des AD8108 Reset Adreset 'reset the ad8108 Waitms 100 'wait 100ms Set Adreset 'Reset done Waitms 20
Vinch = 0 'all output cannels have to connent to input channel 0 For Vhelp = 0 To 7 Voutch = Vhelp Call Cp_set 'set the registers Next Vhelp Reset Adce 'cs to low Waitms 2 Reset Adupdate 'update low Waitms 5 Set Adupdate 'update high Waitms 5 Set Adce 'ce high
At this point all outputs have to be connected to the first input.
Reset Adce Set Adclk If Voutch.0 = 0 Then Reset Ada0 Else Set Ada0 'if bit 0 from variable Voutch is 0 then reset A0 pin from AD8108 else set it high If Voutch.1 = 1 Then Reset Ada1 Else Set Ada1 If Voutch.2 = 2 Then Reset Ada2 Else Set Ada2 If Vinch.0 = 0 Then Reset Add0 Else Set Add0 If Vinch.1 = 1 Then Reset Add1 Else Set Add1 If Vinch.2 = 2 Then Reset Add2 Else Set Add2 Set Add3 'd3 always high, all outputs are active Reset Adclk Waitms 5 Set Adclk Waitms 5 Set Adce
Have anybody an sample program or can see what's my mistake?
Thank you for your post. It would be more informative if you could send the waveforms for all of the digital inputs; looking at these will shed light on what is going on in the software.