C6748中的SPI FLASH

你好，Titan

       现在正在学习C6748的SPI操作，用的TMDXLCDK6748，使用下面这个路径里的SPI实例：

\pdk_C6748_2_0_0_0\C6748_StarterWare_1_20_03_03\examples\lcdkC6748\spi

想通过spi0与其他设备进行通信，中断都触发了，但是引脚没有输出，不知道问题出在哪里，求指点

#include <string.h>
#include "soc_C6748.h"
#include "hw_psc_C6748.h"
#include "lcdkC6748.h"
#include "uart.h"
#include "spi.h"
#include "psc.h"
#include "interrupt.h"
#include "uartStdio.h"

/******************************************************************************
**                      INTERNAL MACRO DEFINITIONS
*******************************************************************************/
/* value to configure SMIO,SOMI,CLK and CS pin as functional pin */
#define SIMO_SOMI_CLK_CS        0x00000E20
#define CHAR_LENGTH             0x8

/******************************************************************************
**                      INTERNAL FUNCTION PROTOTYPES
*******************************************************************************/
static void SPIConfigDataFmtReg(unsigned int dataFormat);
static void SpiTransfer(void);
static void SetUpInt(void);
static void SetUpSPI(void);
static void GetStatusCommand(void);
static void ResetCommand(void);
void SPIIsr(void);

/******************************************************************************
**                      INTERNAL VARIABLE DEFINITIONS
*******************************************************************************/
volatile unsigned int flag = 1;
unsigned int tx_len;
unsigned int rx_len;
unsigned char vrf_data[260];
unsigned char tx_data[260];
volatile unsigned char rx_data[260];
unsigned char *p_tx;
volatile unsigned char *p_rx;
volatile unsigned char StatusResponseMessage[16];

/******************************************************************************
**                      INTERNAL FUNCTION DEFINITIONS
*******************************************************************************/
int main(void)
{
    /* Waking up the SPI1 instance. */
    PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_SPI0, PSC_POWERDOMAIN_ALWAYS_ON,
                     PSC_MDCTL_NEXT_ENABLE);

    /* Initializing the UART instance for serial communication. */
    UARTStdioInit();

    UARTPuts("Welcome to StarterWare SPI application.\r\n\r\n", -1);
    UARTPuts("Here the SPI controller on the SoC communicates with", -1);
    UARTPuts(" the Fingerprint Sensor present on the LCDK.\r\n\r\n", -1);

    /* Performing the Pin Multiplexing for SPI1. */
    SPIPinMuxSetup(0);

    /*
    ** Using the Chip Select(CS) 0 pin of SPI1 to communicate with the Fingerprint Sensor.
    */
    SPI0CSPinMuxSetup(0);

    /* Enable use of SPI1 interrupts. */
    SetUpInt();

    /* Configuring and enabling the SPI1 instance. */
    SetUpSPI();

 tx_data[0] = 0x80;
 tx_data[1] = 0x10;
 tx_data[2] = 0xBA;
 tx_data[3] = 0x07;
 tx_data[4] = 0x00;
 tx_data[5] = 0x00;
 tx_data[6] = 0x00;
 tx_data[7] = 0xFF;
 tx_data[8] = 0xFF;
 tx_data[9] = 0xFF;
 tx_data[10] = 0xFF;
 tx_data[11] = 0xFF;
 tx_data[12] = 0xFF;
 tx_data[13] = 0xFF;
 tx_data[14] = 0xFF;
 tx_data[15] = 0xFF;
 tx_data[16] = 0xFF;
 tx_data[17] = 0xFF;
 tx_data[18] = 0xFF;
 tx_data[19] = 0xFF;
 tx_data[20] = 0xFF;
 tx_data[21] = 0xFF;
 tx_data[22] = 0xFF;

 tx_len = 23;
 rx_len = 23;

    for(;;)
    {
     SpiTransfer();
//     for(; i<100000; i++);
    }
}

/*
** Configures ARM interrupt controller to generate SPI interrupt
**
*/
static void SetUpInt(void)
{
 // Setup the ARM or DSP interrupt controller

#ifdef _TMS320C6X
 // Initialize the DSP interrupt controller
 IntDSPINTCInit();

 // Register the ISR in the vector table
 IntRegister(C674X_MASK_INT4, SPIIsr);

 // Map system interrupt to the DSP maskable interrupt
 IntEventMap(C674X_MASK_INT4, SYS_INT_SPI0_INT);

 // Enable the DSP maskable interrupt
 IntEnable(C674X_MASK_INT4);

 // Enable DSP interrupts globally
 IntGlobalEnable();
#else
    /* Initialize the ARM Interrupt Controller.*/
    IntAINTCInit();

    /* Register the ISR in the Interrupt Vector Table.*/
    IntRegister(SYS_INT_SPINT1, SPIIsr);

    /* Set the channnel number 2 of AINTC for system interrupt 56.
     * Channel 2 is mapped to IRQ interrupt of ARM9.
    */
    IntChannelSet(SYS_INT_SPINT1, 2);

    /* Enable the System Interrupts for AINTC.*/
    IntSystemEnable(SYS_INT_SPINT1);

    /* Enable IRQ in CPSR.*/
    IntMasterIRQEnable();

    /* Enable the interrupts in GER of AINTC.*/
    IntGlobalEnable();

    /* Enable the interrupts in HIER of AINTC.*/
    IntIRQEnable();
#endif
}

//** Configures SPI Controller
static void SetUpSPI(void)
{
 unsigned char cs = 0x20;//0x04;******************
 unsigned char dcs = 0x20;//0x04;******************
 unsigned int val = SIMO_SOMI_CLK_CS;
 SPIReset(SOC_SPI_0_REGS);

 SPIOutOfReset(SOC_SPI_0_REGS);

 SPIModeConfigure(SOC_SPI_0_REGS, SPI_MASTER_MODE);

 SPIClkConfigure(SOC_SPI_0_REGS, 150000000, 1000000, SPI_DATA_FORMAT0);//SCLK原为1M

 SPIPinControl(SOC_SPI_0_REGS, 0, 0, &val);

 SPIDefaultCSSet(SOC_SPI_0_REGS, dcs);

 /* Configures SPI Data Format Register */
 SPIConfigDataFmtReg(SPI_DATA_FORMAT0);

 /* Selects the SPI Data format register to used and Sets CSHOLD
 * to assert CS pin(line)
 */
 SPIDat1Config(SOC_SPI_0_REGS, (SPI_CSHOLD | SPI_DATA_FORMAT0), cs);

 /* map interrupts to interrupt line INT1 */
 SPIIntLevelSet(SOC_SPI_0_REGS, SPI_RECV_INTLVL | SPI_TRANSMIT_INTLVL);

 /* Enable SPI communication */
 SPIEnable(SOC_SPI_0_REGS);
}
//** Configures Data Format register of SPI
static void SPIConfigDataFmtReg(unsigned int dataFormat)
{
 /* Configures the polarity and phase of SPI clock */
 SPIConfigClkFormat(SOC_SPI_0_REGS,(SPI_CLK_POL_HIGH | SPI_CLK_INPHASE),dataFormat);//SPI_CLK_POL_HIGH SPI_CLK_OUTOFPHASE
 //SPIConfigClkFormat(SOC_SPI_0_REGS,(SPI_CLK_POL_LOW | SPI_CLK_INPHASE),dataFormat);

 /* Configures SPI to transmit MSB bit First during data transfer */
 SPIShiftMsbFirst(SOC_SPI_0_REGS, dataFormat);

 /* Sets the Charcter length */
 SPICharLengthSet(SOC_SPI_0_REGS, CHAR_LENGTH, dataFormat);
}

//** Enables SPI Transmit and Receive interrupt.** Deasserts Chip Select line.
static void SpiTransfer(void)
{
 p_tx = &tx_data[0];
 p_rx = &rx_data[0];

 SPIIntEnable(SOC_SPI_0_REGS, (SPI_RECV_INT | SPI_TRANSMIT_INT));
// while(flag);
// flag = 1;
 /* Deasserts the CS pin(line) */
 SPIDat1Config(SOC_SPI_0_REGS, SPI_DATA_FORMAT0, 0x20);
}

//** Data transmission and receiption SPIIsr
void SPIIsr(void)
{
 unsigned int intCode = 0;

 IntEventClear(SYS_INT_SPI0_INT);

 intCode = SPIInterruptVectorGet(SOC_SPI_0_REGS);

 while (intCode)
 {

  if(intCode == SPI_TX_BUF_EMPTY)
  {
   tx_len--;
   SPITransmitData1(SOC_SPI_0_REGS, *p_tx);
   p_tx++;
   if (!tx_len)
   {
    tx_len = 23;
    SPIIntDisable(SOC_SPI_0_REGS, SPI_TRANSMIT_INT);
    break;
   }
  }

        if(intCode == SPI_RECV_FULL)
        {
            rx_len--;
            *p_rx = (char)SPIDataReceive(SOC_SPI_0_REGS);
            p_rx++;
            if (!rx_len)
            {
                flag = 0;
                SPIIntDisable(SOC_SPI_0_REGS, SPI_RECV_INT);
            }
        }

        intCode = SPIInterruptVectorGet(SOC_SPI_0_REGS);
 }
}