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  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 6:36 pm   Subject: SPI master problem, spi_read not working PIC16F887
I just got it to work. I had an LED that was taking the voltage down.
Thank you for your time and your help.

working Code:

#include <16F887.h>

#FUSES INTRC,NOWDT,NOPUT,NOMCLR,NOPROTECT ...
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 6:07 pm   Subject: SPI master problem, spi_read not working PIC16F887
Actually the MISO pin is only showing 0 for low and 2 volts for high. All of my other pins are giving me 0 for low and 5V for high. Could this be the problem?
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 5:24 pm   Subject: SPI master problem, spi_read not working PIC16F887
Here is the data being received (MISO):
http://img170.imageshack.us/img170/8056/misodatafk1.th.pnghttp://img87.imageshack.us/img87/8458/mosidataqx5.th.png[/img]

The data is TTL and the voltages lo ...
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 4:58 pm   Subject: SPI master problem, spi_read not working PIC16F887
My compiler is version 4.020b.

Is there a way to ensure that the PIC is reading bits on the falling edge?
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 4:43 pm   Subject: SPI master problem, spi_read not working PIC16F887
Ok, I put both of those in after, just to see if they do anything. I have an LED set to light up if a 0x02 is ever received. Once it works i will save the data into an array as you have suggested.
I ...
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 4:12 pm   Subject: SPI master problem, spi_read not working PIC16F887
You have to have an account to access the data sheet. Here is all they say about the SPI:

*The M9 SPI interface communicates in Mode 1, which means that the clock polarity is zero and the clock pha ...
  Topic: SPI master problem, spi_read not working PIC16F887
derrickbez

Replies: 12
Views: 13674

PostForum: General CCS C Discussion   Posted: Mon Mar 31, 2008 3:39 pm   Subject: SPI master problem, spi_read not working PIC16F887
I am communicating to an RFID reader using SPI. The reader is the Skyetek M9 and it is the SPI slave device. My PIC16F887 is the SPI master. After about a week I finally was able to get the M9 to tran ...
 
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