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_0C6748_StarterWare_1_20_03_03exampleslcdkC6748spi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.
", -1);
UARTPuts("Here the SPI controller on the SoC communicates with", -1);
UARTPuts(" the Fingerprint Sensor present on the LCDK.
", -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);
}
}
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