jana1972@centrum.cz wrote 2011-11-08 08:25:
> Hi  Isaac,
> Thank you for your reply.
> So I used 1k resistor to ground RB4,also use 5V( direct power from ICD3 d=
ebugger menu in
> MPLAB) but still the same.I can not debug  this very short program ( for =
programming I use
> Programmer choice in the Debugger menu).
> Or must I programm it first via a programmer from Programmer menu ( not D=
ebugger menu)
> in MPLAB IDE?


Program first, then debug.
You can not debug if there is no program in the processor to debug.

>
> #include "P16F628A.INC"  ; Include header file
>      __CONFIG   _CP_OFF&  _LVP_OFF&  _BOREN_OFF&  _MCLRE_ON&  _WDT_OFF
> &_PWRTE_ON&  _INTOSC_OSC_NOCLKOUT
> ;__config  _XT_OSC&_LVP_OFF&  _WDT_ON&  _PWRTE_ON&  _BODEN_OFF
>
> 		org 0
> 		NOP
> 		movlw	0x07
> 		movwf	CMCON
> 		bsf STATUS,RP0		;bank1
> 		BCF TRISA,2
> 		bcf STATUS,RP0		;bank0
> 		BSF PORTA,2
> 		END
>
> Do you have any other idea?
> Thanks
> ?
>
>
>
>> Em 7/11/2011 17:05, jana1972@centrum.cz escreveu:
>>> Hi Jim,
>>> Thanks a lot for your time and help( my thanks to others who replied to=
o)
>>>
>>> Unfortunatelly, I can NOT still use  PIC16F648A - ICD
>>> for the debugging of  PIC16F628A.
>>>
>>> I can program code into PIC16F628A( using PICkit3) and it works as it s=
hould.
>>>
>>> But I can not
>>> program code ( using debugger ICD3 ) into PIC16F648A - ICD header and d=
ebug  the code
>>> with ICD3.
>>>
>>> I receive the error
>>> ICD3Err0040: The target device is not ready for debugging.
>>> Please check your configuration bit settings and program
>>> the device before proceeding.
>>>
>>> Stepping target failed
>>
>>
>> > From the MPLAB ICD2 help, section "Limitations":
>>
>> "
>> PIC16F648A Family Limitations
>> PIC16F648A, PIC16F628A, PIC16F627A
>> Headers are required for debug when using these devices. See the "Debug
>> Header Specification" for details. Header limitations are as follows:
>>
>> General Debug Limitations
>> General Programming Limitations
>> You cannot single step through an interrupt
>> Due to hardware restrictions the debugger/emulator cannot jump to the
>> interrupt vector memory location in single step or animate mode.
>>
>> Program Memory standard flash
>> Program memory not enhanced flash. You cannot program in low voltage
>> mode (Vdd<4.5V.) See device programming specification for more informati=
on.
>>
>> RCIF is cleared when RCREG is interrogated by software, except when
>> Freeze on Halt is enabled.
>> RBIF is cleared when PORT is interrogated by software.
>> When driving a clock oscillator of more than 4 MHz into OSC1 in HS
>> oscillator mode, the device will not go into debug mode. Therefore
>> crystal caps will be required. The 32 kHz to 4 MHz range does not have
>> this issue.
>> Above 16MHz, in EC mode, a Reset executes the first few instructions
>> instead of only 1 instruction. The workaround is to add 3 NOPs at the
>> reset vector.
>> Freeze on Halt Limitations
>> This device family requires a header for debug. Header limitations are
>> as follows:
>>
>> Timer0 will not freeze using the internal clock.
>> Timer0 will not freeze using external clock.
>> CMOUTx Pins do not freeze, status bits and interrupt flags do freeze.
>> "
>>
>>
>> Most important in my opinion:
>>
>> - You cannot program in low voltage mode (Vdd<4.5V.)
>> - When driving a clock oscillator of more than 4 MHz into OSC1 in HS
>> oscillator mode, the device will not go into debug mode.
>>
>> > From another section in the help:
>>
>> "
>> If your code makes use of port pins that correspond to clock and data
>> pins* in programming mode, you may not be able to reprogram your device.
>> When Internal MCLR is used with the debugger/emulator for programming,
>> both Vpp and Vdd are powered together, and then Vpp is pulled high to
>> Vihh to enter programming mode. This means that your code will be
>> running before Vpp goes to Vihh. If that code makes use of port pins
>> that correspond to clock and data pins in programming mode, there is a
>> chance their values may not be 0, as necessary to enter programming
>> mode. Therefore, the device could not be reprogrammed.
>> "
>>
>>
>> Isaac
>>
>> --
>> http://www.piclist.com PIC/SX FAQ&  list archive
>> View/change your membership options at
>> http://mailman.mit.edu/mailman/listinfo/piclist
>
>
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