示例#1
0
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)){
		
	}
}
示例#2
0
文件: init.c 项目: gregjcdyer/ceng455
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;
}