On 1/20/07, Francisco Zabala <zabala.f@gmail.com> wrote:
> Hi all,
>
> I put the following code into the 16F88, and I can no longer access it
> via my USB Board (HP488). Suggestions? The program made all the LEDs
> on the board light up (which is exactly what I was trying to do, but
> now I must figure out how to undo it :) )
>
> Thanks.
>
>                 list      p=16f88                       ; list directive to define processor
>                 #include <p16F88.inc>   ; processor specific variable definitions
>                 errorlevel  -302                ; suppress message 302 from list file
>
>                 __CONFIG    _CONFIG1, _CP_OFF & _CCP1_RB0 & _DEBUG_OFF &
> _WRT_PROTECT_OFF & _CPD_OFF & _LVP_OFF & _BODEN_OFF & _MCLR_OFF &
> _PWRTE_OFF & _WDT_OFF & _HS_OSC
>
>                 CBLOCK          0x20                    ; Declare variable addresses starting at 0x20
>                         Loop1,Loop2
>                 ENDC
>
>                 org      0
>
>                 BANKSEL                 PORTB           ; select bank of PORTB
>                 CLRF            PORTB           ; clearing output data latches to initialize
> (analog on restart for PORTA)
>                 BANKSEL         ANSEL           ; Select Bank of ANSEL
>                 MOVLW           0x00                    ; Configure all pins as digital inputs
>                 MOVWF           ANSEL           ; as digital inputs
>                 MOVLW           0x00                    ; Value used to initialize data direction
>                 MOVWF           TRISB           ; Set RB<7:0> as outputs
>                 BANKSEL         PORTB
>
> Loop
>                 MOVLW           0xFF
>                 MOVWF           PORTA
>                 MOVWF           PORTB
>                 NOP
>                 NOP
>                 CALL            Delay
>                 MOVLW           H'00'
>                 MOVWF           PORTA
>                 MOVWF           PORTB
>                 CALL            Delay
>                 GOTO            Loop
>
> Delay
>                 MOVLW           D'63'
>                 MOVWF           Loop1
> Outer
>                 MOVLW           D'63'
>                 MOVWF           Loop2
> Inner
>                 NOP
>                 NOP
>                 DECFSZ                  Loop2,F
>                 GOTO                    Inner           ; Inner loop = 5 usec.
>                 DECFSZ                  Loop1,F
>                 GOTO                    Outer
>                 RETURN
>
>                 end
>
>
> - Cisco
> -Cisco
>

Sorry to bother you all, bit 3 in port A had to be pulled low.

Thanks,

-Cisco
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