Hi, i try to play with an lcd connected to SPI on the expansionslot.
The only thing wich work is the datapin. The CS1 is permanently high, and CLK permanently low.
Whats wron with my code?
void spi_init(void){
volatile Uint16 delay, tmp;
SPI_REG_CDR = 199; // divider
SPI_REG_CCR = (1<<15); //clock enable
// delay CS lowactive
SPI_REG_DCR1 = (3<<11) | (1<<8);
PCGCR1 &=~(0x0002);
PSRCR = 4;
PRCR |=0x0080;
for(delay = 0; delay < 100; delay++);
tmp=EBSR&0x0fff;
EBSR = tmp | 0x6000;
}
void spi_tx(Int16 value){
unsigned short i;
//8 bit write
SPI_REG_CMD1 = 0x0000; //1 character
SPI_REG_DAT2 = value << 8;
SPI_REG_DAT1 = 0x0000;
SPI_REG_CMD2 = 0x003A; //CS0, 8 bits per character, write
i=0;
while(SPI_REG_STAT1 & 0x0002 == 0) { if(i++ == 0xFFFF) {break;} } //wait for CC=1
i=0;
while(SPI_REG_STAT1 & 0x0001 != 0) { if(i++ == 0xFFFF) {break;} } //wait for BUSY=0
}
