PIC16F886 (28p) and HDSP2111 display [video]

[blueroomelectronics]

I mean a blocking diode (+ve bias) in line with the pickit2 VDD supply. Thus Isolating the Pickit VDD from the system Vdd to prevent a current loop into the Pickit2. That would permit either the Pickit2 to supply Vdd or the system Vdd to do the job. Thus the system can be powered or unpowered and the programmer will work.

Still not sure I follow. I've use the VPP diode block in my kits to insure that VPP isn't feeding VDD when it 13V (it's not critical and unless you have a really weak VDD supply it's unnecessary). That still wouldn't isolate the IR TSOP from doing goofy stuff while the PIC is being reprogrammed.

 

[Mosaic]

tubos did u solve the problem?

 

[tubos]

Unfortunately not, I discovered some additional problems to add the TSOP IR:

- I need one of the PORTB pins since its the only port that has Interrupt on change.
- For measuring the IR Pulses timing accurately I would have to rethink my interrupt routine.

An alternative would be that I do IR Decoding on an other 8pin PIC with MSSP (12F1822)
and send it via I2C to the main pic (this way i dont even need a free pin),
but i have no experience in communicating between 2 pics.