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Thanks.

To PCM Programmer:
Could you do me a favor, could you compile your code for me (use MPLAB IDE with CCS)

#include <16F874A.h>
#fuses HS,NOWDT,NOPROTECT,BROWNOUT,PUT,NOLVP
#use delay(c ...

I am using MPLAB IDE 5.20, CCS C Compiler 4.104, Oshonsoft PIC Simulator IDE 6.33, still not signal from SDO when run under PIC simulator.
What simulator do you run your .hex file?

Thanks.

By theory, I can get a serial signal 0x55 from RC5/SDO pin, and clock on RC3/SCK pin.
Do I need to connect SDO (RC5) to SDI (RC4) to form a loop.
I modified and can not get serial signal from SDO.
...

Above code seems not working.
The code below is copied from text book, but still no data out from SDO (RC5).

#include "16F874A.h"
#use delay(clock=4000000)
#use spi(DI=PIN_ ...

Thanks.
I will try next week.

I am new user with PIC.
Does anyone can show me how to send data to SPI port. (PIF16F874A with C)?
I want to send codes through SPI port (SDO) in sequence.
for example:
1st code: 0xdb,
2nd code: ...