I’m trying to read a buffer from bus system using stm32F4, on falling interrupt. The problem is I need to process the data in main loop, and I don’t need any latency, The falling interrupt, occurs at 500ns, and I don’t want to miss any data. So disabling enabling an interrupt wouldn’t be beneficial here.

I’m looking for a way to reduce latency, and not miss any interrupt.
Here is my approach:

In Main Loop:

    while (1)
    {
        if(iowr_set)
        {
            iowr_set = 0;
              for (int i = 0; i < BUFFER_SIZE; i++)
              {
                  processData(aRxBuffer[i]);
              }

        }
}

Interrupt:

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {


    if (GPIO_Pin == GPIO_PIN_6) { // IORD

        HAL_SRAM_Read_16b(&hsram1, (uint32_t *)(SRAM_BANK_ADDR + WRITE_READ_ADDR), aRxBuffer, BUFFER_SIZE);

        iowr_set = 1;
    }
}

Declarations:

#define BUFFER_SIZE         ((uint32_t)0x0100)
#define WRITE_READ_ADDR     ((uint32_t)0x0800)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
SRAM_HandleTypeDef hsram1;
FMC_NORSRAM_TimingTypeDef SRAM_Timing;

/* Read/Write Buffers */
volatile uint16_t aRxBuffer[BUFFER_SIZE];