Interrupt with Qsys component (DE0-Nano-SoC)

Hello,

https://people.ece.cornell.edu/land/courses/ece5760/DE1_SOC/DE1-SoC-UP-Linux/Linux.pdf (see last pages)

You will need to compile a kernel module.

I would be happy to learn from your expericences, I play with the idea to do the same thing some time.

Best regards,

Johi.

Hello,

This document is very interresting but I wanted to make a C program with a main so I am going test the request_irq function.

Thanks for you answer.

Arnaud.

Hi,

Please check the following document witch show how to write a simple interrupt routine.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an284.pdf

Also you can go with the VIC (Vectored Interrupt Controller)for advanced interrupt routines

https://www.intel.com/content/www/us/en/programmable/support/support-resources/design-examples/intellectual-property/embedded/nios-ii/exm-vectored-interrupt-controller.html

Regards.

BTW, The DE0 nano SOC has a SPI connection with ADC on board, use the following example to understand how to use the SPI ADC.

I have created this example before, not officially released

Here is the main code to read from the ADC (DE0_Nano_SoC)

/*
 * "ADC" example.
 *
 * This example gets the data of the ADC and convert it to digital to implement on LEDs
 * Developer: Embedded guy
 * Nov 2018
 * DE0 Nano SoC
 */
 
#include <stdio.h>
#include "system.h"
#include "altera_up_avalon_adc_regs.h"
#include "altera_up_avalon_adc.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"
 
alt_up_adc_dev * ADC_DEV;
unsigned int ADC_DATA=1;
 
int main()
{
  printf("Starting \n");
  //Enable ADC auto update
  alt_up_adc_auto_enable(ADC_DEV);
 
  //Open the ADC device
 ADC_DEV= alt_up_adc_open_dev("/dev/adc_0");
  if (ADC_DEV==NULL){
	  printf("Cannot open ADC");
  }
 
while (1){
unsigned ch=0;
ADC_DATA = alt_up_adc_read(ADC_DEV,ch);
printf("ADC data of CH0= %d \n",ADC_DATA);
 
int delay=0;
  while (delay<5000000){
	delay++;
  }
}
 
 
  return 0;
}

Please feel free to ask for support if needed.

Regards.