What are the steps to intialize the port and ADC of PIC16F877A?

[swethamenon]

hoW to write instructions for port and ADC initalization of PIC.
i dont know PIC programming..
its urgent..

 

[geobabu]

To use a PORT as GPIO , you need to disable the corresponding ANSEl_ bits (disabling the ADC feature)
Then set the Pins direction as In or out in corresponding TRIS regs, Using PORT / l_AT regs you can either read the status or outs data.

I think , referring a simple PIC tutorial help you to implement this.

 

[tahir4awan]

I think you are talking about how to use ADC of PIC microcontroller. Well I would say if you don't have knowledge even basic of PIC programming then it would be very difficult. But using PORTS of PIC microcontrollers as digital output is very simple.

 

[Tahmid]

For initialization of ports, read this: https://www.mikroe.com/chapters/view/16/chapter-3-pic16f887-microcontroller/#c3v3

For initialization of ADC, go through this:
https://www.edaboard.com/blog/1573/

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SEQUENTIAL STEPS IN ANALOGUE TO DIGITAL CONVERSION USING THE INTERNAL ADC

So, here are the steps to configure the ADC and carry out the conversion:
• Decide which pins need to be analogue, which pins need to be digital and which (if any) need to be configured as reference pins.
• Select the appropriate settings for PCFG[3:0] in ADCON1.
• Select ADC module conversion clock by setting ADCS[2:0] in ADCON1 and ADCON0.
• Select justification method – left-justification or right-justification by setting/clearing ADFM in ADCON1.
• Turn on ADC module by setting ADON to 1 in ADCON0.
• Select which channel is to be sampled/measured and converted by setting CHS[2:0] in ADCON0.
• Wait the required acquisition time.
• Start conversion by setting GO/DONE to 1 in ADCON0.
• Check if conversion is over by checking if GO/DONE has been cleared to 0.
• If conversion is over, read the results from ADRESH:ADRESL.

To learn about the ADC, read these:
https://www.edaboard.com/blog/1569/
https://www.edaboard.com/blog/1570/
https://www.edaboard.com/blog/1571/
https://www.edaboard.com/blog/1572/
https://www.edaboard.com/blog/1573/
https://www.edaboard.com/blog/1574/

 

[zakir_cool]

i think u can get this detail,by referring datasheet itself...u just go through the description of pins..and pic has inbuilt ADC,in datasheet itself given the procedure for programming ADC.

 

[tpetar]

**broken link removed**

http://embedded-lab.com/blog/?p=264

**broken link removed**


MikroC Library for ADC
http://www.mikroe.com/esupport/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=127