void qspi_transmit(int data[]){
int transfer;
int i;
int QSPI_XMIT_RAM_BASE_ADDR = 0x00;
int QSPI_CMD_RAM_BASE_ADDR = 0x20;
//load data into ram
// loads 8 bits at a time, 3 times
for (i = 0; i < 3; i++){
MCF_QSPI_QAR = (unsigned short)(QSPI_XMIT_RAM_BASE_ADDR + i);
MCF_QSPI_QDR = (unsigned short)data[i];
}
//load commands into ram
for (i = 0; i < 3; i++){
MCF_QSPI_QAR = QSPI_CMD_RAM_BASE_ADDR + i;
MCF_QSPI_QDR = 0x4F00;
}
//set start and end position pointers
MCF_QSPI_QWR &= MCF_QSPI_QWR_NEWQP(0);
MCF_QSPI_QWR |= MCF_QSPI_QWR_ENDQP(2);
//initiate transfer
MCF_QSPI_QDLYR |= 0x8000;
while(!(MCF_QSPI_QIR | 0x0001)){
}
}
void init_qspi() {
int i;
// Configure initial Baud Rate to the lowest possible =833.33kbits per second
// Configure number of bits per transfer to 16
MCF_QSPI_QMR = MCF_QSPI_QMR_MSTR |
MCF_QSPI_QMR_BITS(0x0) |
MCF_QSPI_QMR_BAUD(5);
//Baud rate = system clock / 2 * baud value
// Configure suitable delays for the external DAC
MCF_QSPI_QDLYR = MCF_QSPI_QDLYR_QCD(0x4) |
MCF_QSPI_QDLYR_DTL(0x4);
// Enable wraparound mode
// Use the whole 15 memory location in the transmit RAM
MCF_QSPI_QWR = MCF_QSPI_QWR_WREN |
MCF_QSPI_QWR_ENDQP(0x0) |
MCF_QSPI_QWR_NEWQP(0x0);
MCF_QSPI_QAR=0x0020;
MCF_QSPI_QWR |= MCF_QSPI_QWR_CSIV;
MCF_QSPI_QDR = 0x4000; // Command RAM starting Address
for(i=1;i<16;i++)
MCF_QSPI_QDR=0x4000;
// Run QSPI
MCF_QSPI_QDLYR |= MCF_QSPI_QDLYR_SPE;
}
