怎么看不到后面程序了，我再发：
EALLOW;
GpioCtrlRegs.GPAMUX1.bit.GPIO11 = 0; // GPI11
GpioCtrlRegs.GPADIR.bit.GPIO11= 0; // input
GpioCtrlRegs.GPAQSEL1.bit.GPIO11 = 0;
EDIS;
spi_fifo_init(); // Initialize the Spi FIFO
spi_init(); // init SPI
// Step 5. User specific code:
// Interrupts are not used in this example.
rdata = 0x0000;
for(;;)
{
// Transmit data
while(GpioDataRegs.GPADAT.bit.GPIO11==1)
{
while(SpiaRegs.SPIFFRX.bit.RXFFST !=1) { }
rdata = SpiaRegs.SPIRXBUF;
}
}
}
void spi_init()
{
SpiaRegs.SPICCR.all =0x000F; // Reset on, rising edge, 16-bit char bits
SpiaRegs.SPICTL.all =0x0006; // Enable master mode, normal phase,
// enable talk, and SPI int disabled.
SpiaRegs.SPIBRR =0x007F;
SpiaRegs.SPICCR.all =0x009F; // Relinquish SPI from Reset
SpiaRegs.SPIPRI.bit.FREE = 1; // Set so breakpoints don't disturb xmission
}
void spi_xmit(Uint16 a)
{
SpiaRegs.SPITXBUF=a;
}
void spi_fifo_init()
{
// Initialize SPI FIFO registers
SpiaRegs.SPIFFTX.all=0xE040;
SpiaRegs.SPIFFRX.all=0x204f;
SpiaRegs.SPIFFCT.all=0x0;
}
|
楼主
