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TMS320F28377D的SPI与传感器的通信

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,就是发什么接受什么。

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

void InitSpib(void)
{// Initialize SPI-B// Set reset low before configuration changes// Clock polarity (0 == rising, 1 == falling)// 8-bit character// Disable loop-backSpibRegs.***.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 disabledSpibRegs.***.bit.MASTER_SLAVE = 1;SpibRegs.***.bit.TALK = 1;SpibRegs.***.bit.CLK_PHASE = 0;SpibRegs.***.bit.SPIINTENA = 0;// Set the baud rateSpibRegs.SPIBRR.bit.SPI_BIT_RATE = SPI_BRR;// Set FREE bit// Halting on a breakpoint will not halt the SPISpibRegs.SPIPRI.bit.FREE = 1;// Release the SPI from resetSpibRegs.***.bit.SPISWRESET = 1;
}
void InitSpibGpio(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 SPISIMOAGpioCtrlRegs.GPAGMUX2.bit.GPIO25 = 1; // Configure GPIO17 as SPISOMIAGpioCtrlRegs.GPAGMUX2.bit.GPIO26 = 1; // Configure GPIO18 as ***GpioCtrlRegs.GPAGMUX2.bit.GPIO27 = 1; // Configure GPIO19 as SPISTEAGpioCtrlRegs.GPAMUX2.bit.GPIO24 = 2; // Configure GPIO16 as SPISIMOAGpioCtrlRegs.GPAMUX2.bit.GPIO25 = 2; // Configure GPIO17 as SPISOMIAGpioCtrlRegs.GPAMUX2.bit.GPIO26 = 2; // Configure GPIO18 as ***GpioCtrlRegs.GPAMUX2.bit.GPIO27 = 2; // Configure GPIO19 as SPISTEAEDIS;
}

Shine:

TMS320F28377D属于C2000系列,请到下面的C2000论坛咨询。
e2echina.ti.com/…/

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