NVIC Interrupt Priority Grouping

Q

How does the NVIC work?

A

Here is an example code using the wrapper functions in our driver on top of the original CMSIS NVIC functions.

NVICExample.c

#include "Examples.h"
#include "netx_drv.h"

void callbackGPIO0(void*pvContext,void*pvCustom){
  DRV_NVIC_SetPendingIRQ(gpio_app1_IRQn);
  __BKPT();
}
void callbackGPIO1(void*pvContext,void*pvCustom){
  __BKPT();
}

int nvicexample(int argc, const char* argv[]) {
  (void) DRV_DIO_ChannelIRQAttach(DRV_DIO_ID_GPIO_0,callbackGPIO0,0);
  (void) DRV_DIO_ChannelIRQAttach(DRV_DIO_ID_GPIO_1,callbackGPIO1,0);
  // Callback callbackGPIO1 is called after callbackGPIO0
  DRV_NVIC_SetPendingIRQ(gpio_app0_IRQn);
  DRV_NVIC_SetPriority(gpio_app1_IRQn,1,0);
  DRV_NVIC_SetPriority(gpio_app0_IRQn,2,0);
  // Callback callbackGPIO1 is called inside callbackGPIO0
  DRV_NVIC_SetPendingIRQ(gpio_app0_IRQn);
  return 0;
}

See also...