nomdomokunnom
New Member
Hi guys,
I'm new to PIC programming and to Assembly so bear with me please; I recently bought a kit from Maplin which comprised a Velleman VM111 programmer and P16F627 and tried one of the demo applications which came with the software, and a couple of simple programs I adapted from online to learn assembly, which worked fine. I then adapted a sample program from Nigel Goodwin's beginning , assembled it with MPASM and wrote it to the microcontroller with Progpic2, and it worked... but somehow progpic2 can no longer communicate with the μc, so I can't change the program, or even remove the program from the device. I'm totally stumped as to why, as I've also double-checked the configuration in progpic2. Any ideas?
The code I used (slightly modified from Nigel Goodwin's tutorial since I'm using a different chip):
The error I keep receiving:
Naturally I've made sure the programmer's set to program mode, the PIC is securely in place, and I used a program which previously worked fine (and made sure the config settings in progpic2 were correct).
Any help solving this problem would be greatly appreciated.
I'm new to PIC programming and to Assembly so bear with me please; I recently bought a kit from Maplin which comprised a Velleman VM111 programmer and P16F627 and tried one of the demo applications which came with the software, and a couple of simple programs I adapted from online to learn assembly, which worked fine. I then adapted a sample program from Nigel Goodwin's beginning , assembled it with MPASM and wrote it to the microcontroller with Progpic2, and it worked... but somehow progpic2 can no longer communicate with the μc, so I can't change the program, or even remove the program from the device. I'm totally stumped as to why, as I've also double-checked the configuration in progpic2. Any ideas?
The code I used (slightly modified from Nigel Goodwin's tutorial since I'm using a different chip):
Code:
;Hello chip program, adapted from http://www.winpicprog.co.uk/pic_tutorial1.htm.
LIST p=16F627 ;tell assembler what chip we are using
include "P16F627.inc" ;include the defaults for the chip
__config _BODEN_ON & _CP_OFF & _DATA_CP_OFF & _PWRTE_ON & _WDT_OFF & _LVP_OFF & _MCLRE_ON & _XT_OSC
cblock 0x20 ;start of general purpose registers
count1 ;used in delay routine
counta ;used in delay routine
countb ;used in delay routine
endc
org 0x0000 ;org sets the origin, 0x0000 for the 16F628,
;this is where the program starts running
movlw 0x07
movwf CMCON ;turn comparators off (make it like a 16F84)
bsf STATUS, RP0 ;select bank 1
movlw b'00000000' ;set PortB all outputs
movwf TRISB
movwf TRISA ;set PortA all outputs
bcf STATUS, RP0 ;select bank 0
Loop
movlw 0xff
movwf PORTA ;set all bits on
movwf PORTB
nop ;the nop's make up the time taken by the goto
nop ;giving a square wave output
call Delay ;this waits for a while!
movlw 0x00
movwf PORTA
movwf PORTB ;set all bits off
call Delay
goto Loop ;go back and do it again
Delay movlw d'250' ;delay 250 ms (4 MHz clock)
movwf count1
d1 movlw 0xC7
movwf counta
movlw 0x01
movwf countb
Delay_0
decfsz counta, f
goto $+2
decfsz countb, f
goto Delay_0
decfsz count1 ,f
goto d1
retlw 0x00
end
The error I keep receiving:
Code:
NO PIC ON BOARD, PROGRAMMER MUST BE SET TO PGM MODE, PIC TYPE MISMATCHED WITH SOFTWARE,...
Naturally I've made sure the programmer's set to program mode, the PIC is securely in place, and I used a program which previously worked fine (and made sure the config settings in progpic2 were correct).
Any help solving this problem would be greatly appreciated.
Last edited: