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C6678使用CSL配置中断,不能持续接收FPGA中断GPIO0

Other Parts Discussed in Thread: SYSBIOS

工程师您好,  我们调试C6678为实现和FPGA的通信,现使用CSL配置15号中断,代码如下,在不使用while(a!=1){}(void GPIO_init()函数的最后一行)等待中断到来,而在main()中while(1)执行MAC层程序代码时,接收不到中断,这是为什么?为什么不是:在main()里的while(1)循环中正常执行自己的工程代码,在FPGA中断到来时再执行中断处理函数intIsr(),执行完后再返回继续执行程序代码?  使用while(a!=1){}在GPIO_init函数中等待终端到来时,可以持续接收到中断,这里我想再请教一个问题:为什么每次接收到中断,程序都从最开始的初始化执行一遍,且中断函数中的中断次数不累加,每次进来都为0,然后置1?

GPIO初始化函数:

CSL_GpioHandle hGpio;

int demoFail = 0;

/* Interrupt module Declarations */
CSL_IntcContext             intcContext;
CSL_IntcEventHandlerRecord  EventHandler[30];
CSL_IntcObj                 intcObj;
CSL_IntcHandle              hTest;
CSL_IntcGlobalEnableState   state;
CSL_IntcEventHandlerRecord  EventRecord;
CSL_IntcParam               vectId;

CSL_GpioHandle  hGpio;

void GPIO_init()
{
 int pinNum = 0;
 int bankNum = 0;

 /************************************************
  *************** INTC Configuration *************
  ************************************************/

 printf ("Debug: GEM-INTC Configuration...\n");

 /* INTC module initialization */
 intcContext.eventhandlerRecord = EventHandler;
 intcContext.numEvtEntries      = 10;
 if (CSL_intcInit(&intcContext) != CSL_SOK)
 {
  printf("Error: GEM-INTC initialization failed\n");
  return;
 }

 /* Enable NMIs */
 if (CSL_intcGlobalNmiEnable() != CSL_SOK)
 {
  printf("Error: GEM-INTC global NMI enable failed\n");
  return;
 }

 /* Enable global interrupts */
 if (CSL_intcGlobalEnable(&state) != CSL_SOK)
 {
  printf ("Error: GEM-INTC global enable failed\n");
  return;
 }

 /* Open the INTC Module for Vector ID: 4 and Event ID: 90 (GPIO_n in C6678)*/
 vectId = CSL_INTC_VECTID_4;
 hTest = CSL_intcOpen (&intcObj, 89, &vectId , NULL);//89:GPIO_15
 if (hTest == NULL)
 {
  printf("Error: GEM-INTC Open failed\n");
  return;
 }

 /* Register an call-back handler which is invoked when the event occurs. */
 EventRecord.handler = &intIsr;//intIsr;
 EventRecord.arg = 0;//hTest
 if (CSL_intcPlugEventHandler(hTest,&EventRecord) != CSL_SOK)
 {
  printf("Error: GEM-INTC Plug event handler failed\n");
  return;
 }

 /* Enabling the events. */
 if (CSL_intcHwControl(hTest,CSL_INTC_CMD_EVTENABLE, NULL) != CSL_SOK)
 {
  printf("Error: GEM-INTC CSL_INTC_CMD_EVTENABLE command failed\n");
  return;
 }

 printf ("Debug: GEM-INTC Configuration Completed\n");


 // 1. Init Flag
 a = 0;
 printf("a = %d\n",a);

 // 2. Trigger GPIO_0 in Core0
 pinNum = 15;
 bankNum = 0;

 // Open the CSL GPIO Module 0
 hGpio = CSL_GPIO_open (0);

 // Set GPIO pin number 0 as an output pin
 CSL_GPIO_setPinDirOutput (hGpio, pinNum);

 // Set interrupt detection on GPIO pin 0 to rising edge
 CSL_GPIO_setRisingEdgeDetect (hGpio, pinNum);

 // Enable GPIO per bank interrupt for bank zero
 CSL_GPIO_bankInterruptEnable (hGpio, bankNum);

 // Toggle GPIO_0 pin to trigger GPIO interrupt
 CSL_GPIO_clearOutputData (hGpio, pinNum); //GPIO_0=0
 CSL_GPIO_setOutputData (hGpio, pinNum);  //GPIO_0=1

 return;
 // 3. Wait for entering into ISR
 //while(a!=1){}//必使用?

中断处理函数:

volatile int a = 0;

Uint32 int_cnt = 0;//中断次数统计
interrupt void intIsr()
{
 a = 1;
 int_cnt++;//不累加?
 //if( int_cnt % 32 == 0 )
 //{
  SWrite_Flag = 1;
  SRIO_Data_SWrite( 0x90000000, FPGA_SRIO_BASE_ADDR, 512 );
  printf("GPIO INTR %d\t%d\n",int_cnt,SWrite_Flag);
 //}

 return ;
}