Help me detect DeviceID!

[quynhthom]

Hi every body...!
I have finished board. But, I don't understand Why It don't run. I use Open
programmer Version 0.7.7 with IC master PIC18F2550, try to program PIC16F877A
Programer doesn't detect device ID. Help me solve this error.





Thanks for every body...!

[Alberto Maccioni]

Hello,
you should first run the hardware test to see if there are any errors on your
circuit.

[roehatreides]

Hello, I am also building one, I got an error after writing the program to PIC16F877A

Code memory:
0000: 2805 0000 0000 0000 0000 0185 0186 1683 0185 0186 1283 30FF 0085 0086 2013 0185

0010: 0186 2013 280B 3003 008E 3089 008D 0B8C 2817 0B8D 2817 0B8E 2817 0008 FFFF FFFF

2000: FFFF FFFF FFFF FFFF FFFF FFFF FFFF 3FF1

Regulator up and running after T=133 ms VPP=12.8V

Can't find EEPROM data
DevID: 0x3FFF
Unknown device
Configuration word: 0x3FFF
Erasing ... completed
Writing code ...

Error writing address 0: written 2805, read 3FFF

Error writing address 1: written 0000, read 3FFF

Error writing address 2: written 0000, read 3FFF

Error writing address 3: written 0000, read 3FFF

Error writing address 4: written 0000, read 3FFF

Error writing address 5: written 0185, read 3FFF

Error writing address 6: written 0186, read 3FFF

Error writing address 7: written 1683, read 3FFF

Error writing address 8: written 0185, read 3FFF

Error writing address 9: written 0186, read 3FFF

Error writing address A: written 1283, read 3FFF

Error writing address B: written 30FF, read 3FFF

Error writing address C: written 0085, read 3FFF

Error writing address D: written 0086, read 3FFF

Error writing address E: written 2013, read 3FFF

Error writing address F: written 0185, read 3FFF

Error writing address 10: written 0186, read 3FFF

Error writing address 11: written 2013, read 3FFF

Error writing address 12: written 280B, read 3FFF

Error writing address 13: written 3003, read 3FFF

Error writing address 14: written 008E, read 3FFF

Error writing address 15: written 3089, read 3FFF

Error writing address 16: written 008D, read 3FFF

Error writing address 17: written 0B8C, read 3FFF

Error writing address 18: written 2817, read 3FFF

Error writing address 19: written 0B8D, read 3FFF

Error writing address 1A: written 2817, read 3FFF

Error writing address 1B: written 0B8E, read 3FFF

Error writing address 1C: written 2817, read 3FFF

Error writing address 1D: written 0008, read 3FFF
completed, 30 errors
Writing CONFIG area ... Error writing config area: written 3FF1, read 3FFF
completed, 1 errors

End (1.78 s) 31 errors

[Alberto Maccioni]

Same advice, run the hardware test first; you will most likely find something wrong.
Or it's just a false contact on the target socket.

[roehatreides]

Here is the hardware test results:

VDD = 5V, VPP = 13V, D = 0V, CK=0V, PGM=0V

[pressed ok]

VDD=5V, VPP=0V, CK=5V, PGM = 5V

[pressed ok]

VDD = 0V, VPP = 13V, D = 5V, CK = 0V, PGM = 0V

[pressed ok]

VDD= 0V, VPP = 0V, D = 0V, CK = 5V, PGM = 0V

[Alberto Maccioni]

As I wrote in the email, you have to measure the voltages, not just go to the next step.