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SPI LED blink problem. What am I doing wrong ?

iraquois

Hi. I am new on programming arm products. I am just trying to blink a led by using SPI protocol with LPC2138. But I didn't understan what i am doing wrong.

here is my master code :

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#include <lpc213x.h>
int main(void)
{
PINSEL0 = (1<<8)|(1<<10)|(1<<12);
IOSET0 = 1<<7;
IODIR0 = 1<<7;
S0SPCCR=8;
S0SPCR = 0x38; //Master Select
IOCLR0=(1<<7);
S0SPDR=0xff; //Data transmission
while(!(S0SPSR&(1<<7))); //Status check
S0SPDR=0xff;
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

here is my slave code : 

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#include<lpc213x.h>
int main(){
PINSEL0 = (1<<8)|(1<<10)|(1<<12);
IODIR0 = 0<<7;
S0SPCR = 0x24;
IODIR1=0xff;
while (1){
IOSET1=S0SPDR;
while(!(S0SPSR&(1<<7))); //Status check
IOSET1=S0SPDR;
}
}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

actually I took master code from https://www.gadgetronicx.com/spi-protocol-tutorial-arm/ and I tried to write a simple slave code. Sorry for my English.

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