ICDWarn0020: Invalid target device id (expected=0x4F, read=0x0)

[kutsi]

'Aim: to use adc bits as inputs, apply sinusoidal input and
'upgrade the blink project a little further. The next step is going to
'be using interrupt.


'OpenADC(ADC_FOSC_32&ADC_RRIGHT_JUST&ADC_12_TAD,AD C_CH0&ADC_INT_OFF,0)
' I do not really know how to activate ADC, and use it. The above one
'is actually a c code.


Define ADC_BITS 8 ' Set number of bits in result
Define ADC_CLOCK 3 ' Set clock source (3=rc)
Define ADC_SAMPLEUS 50 ' Set sampling time in uS

ADC_intstatus var PortB.0

On Interrupt Goto ADC_interrupt

INTCON=%10010000 ' Enable RBO interrupt

Outvalue var PORTD.0
adc_result var word ' Create adc_'result to store result

Outvalue= 0 'Set PORTD.0 output
TRISA = %11111111 'Set PORTA to all input, so I can use ADC
' bits as input
ADCON1 = %10000010' Set PORTA analog and right justify result

DISABLE
ADC_interrupt:

Pause 500 ' Wait .5 second while (Busy adc()) ' while it is busy keep it in a loop

ADCIN 0, adc_result ' Read channel 0 to adcresult

if adc_result> 125 then Outvalue =! Outvalue ' I thought if it is 8 bits, then 2^8=256


RESUME
ENABLE

End



Thanks for the comments, Skimask. I was busy studying as u suggested. It is the reason for the late reply. This is the new code, with 'interrupt' in it.

My pic is dead, I've ordered a new one. I cannot try it right now.

I'm working with PIC18F4550. Want to use A/D pins as inputs, and make PORTD.0 to blink led.

[kutsi]

actually I tried to debug it with the simulation.

CORE-E0002: Stack under flow error occurred from instruction at 0x0000c4

Can someone help me on the code?

[kutsi]

if u want to test your (interrupt)code without connecting an external device, you should not forget to create your own interrupt. At least, it was enough to solve my problem. the easiest way ;
-initiate PORTB <7:4>=0
-when u want to create interrupt set PORTB<7:4>=1

Did I start answering my own questions or what?


best regards

[Pic_User]

Did I start answering my own questions or what?
best regards

Wow kutsi,
It doesn’t get any better than asking a question, learning, and answering your own question.
Great! Just don’t get into a flame war argument with yourself. That’s the worst.
-Adam-