TI中文支持网说明：传感器工作在SPI的模式0，传输速度最高10MHZ，MSB，8bit数据；
程序概括：使用芯片的SPIB引脚，根据官方例程进行代码修改，完成寄存器配置
目前程序现象：已关闭自循环标志位，但是发送数据以后，还是会在接收寄存器观察到相同的数据，就是发什么接收什么。
代码：
1、主程序
#include "F28x_Project.h"
void spi_xmit(Uint16 a);
void spi_fifo_init(void);
void spib_fifo_init(void);
unsigned char spib_xmit(unsigned char a);
unsigned char RecData;
unsigned char SendData;
void main(void)
{InitSysCtrl();InitSpibGpio();DINT;InitPieCtrl();IER = 0x0000;IFR = 0x0000;InitPieVectTable();spib_fifo_init();// Initialize the SPI FIFOSendData = 0x00;for(;;){RecData = spib_xmit(SendData);SendData++;if(SendData == 0xFF){SendData = 0x00;}}
}
//
// spi_fifo_init - Initialize SPIB FIFO
//
void spib_fifo_init(void)
{//// Initialize SPI FIFO registers//SpibRegs.SPIFFTX.all = 0xE040;SpibRegs.SPIFFRX.all = 0x2044;SpibRegs.SPIFFCT.all = 0x0;//// Initialize core SPI registers//InitSpib();
}
//
// spi_xmit - Transmit value via SPI
//
unsigned char spib_xmit(unsigned char a)
{unsigned char Receive;SpibRegs.SPITXBUF = a;while(SpibRegs.SPIFFRX.bit.RXFFST !=1) { }Receive = SpibRegs.SPIRXBUF;Receive = Receive >> 8;return Receive;
}
//
// End of file
//
2、SPIB的引脚和寄存器配置
voidInitSpib(void){ // Initialize SPI-B // Set reset low before configuration changes // Clock polarity (0 == rising, 1 == falling) // 8-bit character // Disable loop-back SpibRegs.***.bit.SPISWRESET = 0; SpibRegs.***.bit.CLKPOLARITY = 0; SpibRegs.***.bit.*** = (8-1); SpibRegs.***.bit.SPILBK = 0; // Enable master (0 == slave, 1 == master) // Enable transmission (Talk) // Clock phase (0 == normal, 1 == delayed) // SPI interrupts are disabled SpibRegs.***.bit.MASTER_SLAVE = 1; SpibRegs.***.bit.TALK = 1; SpibRegs.***.bit.CLK_PHASE = 0; SpibRegs.***.bit.SPIINTENA = 0; // Set the baud rate SpibRegs.SPIBRR.bit.SPI_BIT_RATE = SPI_BRR; // Set FREE bit // Halting on a breakpoint will not halt the SPI SpibRegs.SPIPRI.bit.FREE = 1; // Release the SPI from reset SpibRegs.***.bit.SPISWRESET = 1;}voidInitSpibGpio(void){ EALLOW; GpioCtrlRegs.GPAPUD.bit.GPIO24 = 0; // Enable pull-up on GPIO16 (SPISIMOB) GpioCtrlRegs.GPAPUD.bit.GPIO25 = 0; // Enable pull-up on GPIO17 (SPISOMIB) GpioCtrlRegs.GPAPUD.bit.GPIO26 = 0; // Enable pull-up on GPIO18 (***) GpioCtrlRegs.GPAPUD.bit.GPIO27 = 0; // Enable pull-up on GPIO19 (SPISTEB) GpioCtrlRegs.GPAQSEL2.bit.GPIO24 = 3;// Asynch input GPIO16 (SPISIMOB) GpioCtrlRegs.GPAQSEL2.bit.GPIO25 = 3;// Asynch input GPIO17 (SPISOMIB) GpioCtrlRegs.GPAQSEL2.bit.GPIO26 = 3;// Asynch input GPIO18 (***) GpioCtrlRegs.GPAQSEL2.bit.GPIO27 = 3;// Asynch input GPIO19 (SPISTEB) GpioCtrlRegs.GPAGMUX2.bit.GPIO24 = 1;// Configure GPIO16 as SPISIMOA GpioCtrlRegs.GPAGMUX2.bit.GPIO25 = 1;// Configure GPIO17 as SPISOMIA GpioCtrlRegs.GPAGMUX2.bit.GPIO26 = 1;// Configure GPIO18 as *** GpioCtrlRegs.GPAGMUX2.bit.GPIO27 = 1;// Configure GPIO19 as SPISTEA GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 2;// Configure GPIO16 as SPISIMOA GpioCtrlRegs.GPAMUX2.bit.GPIO25 = 2;// Configure GPIO17 as SPISOMIA GpioCtrlRegs.GPAMUX2.bit.GPIO26 = 2;// Configure GPIO18 as *** GpioCtrlRegs.GPAMUX2.bit.GPIO27 = 2;// Configure GPIO19 as SPISTEA EDIS;}Green Deng：
你好，你具体是用的哪个例程？都做了哪些修改？
在接收寄存器观察到相同的数据，与传感器的通信有问题吗？
