SPI_READ() !!! HELP!!!

[cxiong]

I am trying to write a routine to set value to digital POT MCP41010 and read it current wiper value. I got the SPI_WRITE function working ok. But I can't get the SPI_READ() function work.

I look at the CCS compiler manual but there is not enough iinfor for the spi_read().

Any body got any SPI_READ() routine that work?

See my code below:

Please help

Thanks.

//////////////////////////////////////////////////////////////////////////////////////
/// //
/// //
/// //
/// Digital Pot control MCP41010 //
/// //
/// //
///
/// ---------
/// | 1 |-B0------------
/// | 6 | | ---------
/// | F | |--CS---| 4 |
/// | 8 |-C3--------------SCK---| 1 |
/// | 7 | | 0 |
/// | 7 |-C5---------------SI---| 1 |
/// | | | 0 |
/// --------- ---------
///
/// _CS connect to RB0 ** Active Low
/// SCK connect to RC3
/// SI connect to RC5
/// PA0 connect to +5V
/// PB0 connect to GND
/// PW0 connect to Voltmeter.
///
/////////////////////////////////////////////////////////////////////////////////////
#include <16f877.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)


#include <input.c>
#define CS (PIN_B0)

void main()
{
byte value,cmd,spi;
setup_spi(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_16);
output_high(CS);

while(true)
{
printf("\r\nRead or Write: ");
cmd=getc();
cmd=toupper(cmd);
putc(cmd);
while ( (cmd!='R') && (cmd!='W') );

if(cmd=='W')
{
printf("\r\nNew value: ");
value = gethex();
printf("\n\r");
output_low(CS);
SPI_WRITE(0X13);
delay_us(1);
SPI_WRITE(value );
output_high(CS);
}
if(cmd=='R')
{
output_low(CS);
spi = SPI_READ(0);
printf("\r\nValue: %X\r\n",spi);
output_high(CS);
}
}

}

[Mark]

First, you shouldn't double post.
Second, you need to read the datasheet

http://ww1.microchip.com/downloads/en/DeviceDoc/11195c.pdf