SPI communication between two STR910

Hello,

I want to comunicate two STR910 micros via SPI. One of them will be the master, and other the slave. The code is very simple:

[b]MASTER:[/b]

/* CLK, MISO & MOSI configuration */
SCU->GPIOOUT[3] &= 0xC0FF;
SCU->GPIOOUT[3] |= 0x2200;
SCU->GPIOIN[3] |= 0x20;

/* SPI1 configuration */
SSP1->CR0 = 0x0007; /* CPHA=0, CPOL=0 */
SSP1->CR1 = 0x0002; /* Master mode & SSP Enable */
SSP1->PR = 0xFE;

/* Send data */
for(i=0;i<20;i++)
{ SSP1->DR = 0x41;
}

[b]SLAVE:[/b]

/* CLK, MISO & MOSI configuration */
SCU->GPIOOUT[3] &= 0xC0FF;
SCU->GPIOOUT[3] |= 0x0800;
SCU->GPIOIN[3] |= 0x40;
SCU->GPIOIN[3] |= 0x10;

/* SPI1 configuration */
SSP1->CR0 = 0x0007;
SSP1->CR1 = 0x0006; /* Slave Mode & SSP Enable */
SSP1->PR = 0xFE;

/* Receive data --> Status Register */
while((SSP1->SR & 0x04)==0);
for(i=0;i<20;i++)
{ buf[i] = SSP1->DR;
}

But I donÂ't receive anything. Which is the problem?

Thanks in advance.