问STM32最大中断处理频率

EN

        /*
* Project name:
  EXTI_interrupt (EXTI interrupt test)
* Copyright:
  (c) Mikroelektronika, 2011.
* Revision History:
  20111226:
   - Initial release;
* Description:
 This code demonstrates how to use External Interrupt on PD10.
 PD10 is external interrupt pin for click1 socket.
 receive data from mosi line in each rising edge.
* Test configuration:
 MCU:             STM32F407VG
                  http://www.st.com/st-web- 

 ui/static/active/en/resource/technical/document/datasheet/DM00037051.pdf
 dev.board:       EasyMX PRO for STM32
                  http://www.mikroe.com/easymx-pro/stm32/
 Oscillator:      HSI-PLL, 140.000MHz
 Ext. Modules:    -
 SW:              mikroC PRO for ARM
                  http://www.mikroe.com/mikroc/arm/
* NOTES:
  receive 32 bit data from mosi line in each rising edge
*/
          //D10 clk
          //D2 ss
          //C0 MOSI
          //C1 FLAG



   int read=0;
 int flag_int=0;
int val=0;
int rec_data[32];
 int index_rec=0;
 int display_index=0;
 int flag_dint=0;



void ExtInt() iv IVT_INT_EXTI15_10 ics ICS_AUTO {
EXTI_PR.B10 = 1;                     // clear flag
flag_int=1; //Flag on interrupt

}

TFT_Init_ILI9340();

void main() {


GPIO_Digital_Input(&GPIOD_BASE, _GPIO_PINMASK_10);
GPIO_Digital_Output(&GPIOD_BASE, _GPIO_PINMASK_13); // Set PORTD as 
digital output
GPIO_Digital_Output(&GPIOD_BASE, _GPIO_PINMASK_12); // Set PORTD as 
digital output
GPIO_Digital_Output(&GPIOD_BASE, _GPIO_PINMASK_14); // Set PORTD as 
digital output
GPIO_Digital_Output(&GPIOD_BASE, _GPIO_PINMASK_15); // Set PORTD as    
digital output


  GPIO_Digital_Input(&GPIOA_IDR, _GPIO_PINMASK_0);         // Set PA0 as 
  digital input
  GPIO_Digital_Input(&GPIOC_IDR, _GPIO_PINMASK_0);         // Set PA0 as 
  digital input
  GPIO_Digital_Input(&GPIOC_IDR, _GPIO_PINMASK_2);         // Set PA0 as 
 digital input
  GPIO_Digital_Output(&GPIOC_IDR, _GPIO_PINMASK_1);         // Set PA0 as 
 digital input

 //interupt register
SYSCFGEN_bit = 1;                    // Enable clock for alternate pin 
functions
SYSCFG_EXTICR3 = 0x00000300;         // Map external interrupt on PD10
EXTI_RTSR = 0x00000000;              // Set interrupt on Rising edge 
(none)
EXTI_FTSR = 0x00000400;              // Set Interrupt on Falling edge 
(PD10)
EXTI_IMR |= 0x00000400;              // Set mask
//NVIC_IntEnable(IVT_INT_EXTI15_10);   // Enable External interrupt

while(1)
{


        //interrupt is not enable until i push the button
                     if((GPIOD_ODR.B2==0)&&(flag_dint==0))

             {                            if (Button(&GPIOA_IDR, 0, 1, 1))
                                  {
                                       Delay_ms(100);
                                       GPIOC_ODR.B1=1;     //Status for FPGA
                                           NVIC_IntEnable(IVT_INT_EXTI15_10);   // Enable External interrupt
                                   }


              }

            if(flag_int==1)
             {
    //functionality on rising edge
                          flag_int=0;

                      if(index_rec<31)
                      {

                //display data on led
                                   GPIOD_ODR.B13=    GPIOC_IDR.B0;
//save data in an array                     
 rec_data[index_rec]=  GPIOC_IDR.B0;
   //read data

                              index_rec=index_rec+1;
                      }
                      else
                      {
                             flag_dint=1;
                               NVIC_IntDisable(IVT_INT_EXTI15_10);
                      }





}                           // Infinite loop

       }
}