void LCDReset(void)
{
LED_A_ON();
SetupSpi(SPI_LCD_MODE);
LOW(GPIO_LRST);
SpinDelay(100);
HIGH(GPIO_LRST);
SpinDelay(100);
LED_A_OFF();
}
//-----------------------------------------------------------------------------
// Transmit data over the SPI then receive any incoming data.
// Data can be variable length (8 - 16 bits)
//-----------------------------------------------------------------------------
unsigned int spi_com(unsigned int channel, unsigned int dout, unsigned char last)
{
unsigned int din;
SetupSpi(channel); // enable relevant channel
while ( !( AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TDRE ) ); // wait for SPI ready state
AT91C_BASE_SPI->SPI_TDR = dout; // send data
while ( !( AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RDRF ) ); // wait for incoming data
din = AT91C_BASE_SPI->SPI_RDR ; // receive data
if (last) AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN | AT91C_SPI_LASTXFER;
return (din & 0xffff);
}
//-----------------------------------------------------------------------------
// Send a 16 bit command/data pair to the FPGA.
// The bit format is: C3 C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
// where C is the 4 bit command and D is the 12 bit data
//-----------------------------------------------------------------------------
void FpgaSendCommand(uint16_t cmd, uint16_t v)
{
SetupSpi(SPI_FPGA_MODE);
while ((AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0); // wait for the transfer to complete
AT91C_BASE_SPI->SPI_TDR = AT91C_SPI_LASTXFER | cmd | v; // send the data
}
