File content as of revision 1:8792acb5a039:

/***************************************************************************//**
 *   @file    app_config.c
 *   @brief   Application configurations module
 *   @details This module contains the configurations needed for IIO application
********************************************************************************
 * Copyright (c) 2021 Analog Devices, Inc.
 * All rights reserved.
 *
 * This software is proprietary to Analog Devices, Inc. and its licensors.
 * By using this software you agree to the terms of the associated
 * Analog Devices Software License Agreement.
*******************************************************************************/

/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/

#include <stdbool.h>
#include "app_config.h"
#include "adc_data_capture.h"
#include "error.h"
#include "gpio.h"
#include "irq.h"
#include "pwm.h"
#include "uart.h"

/******************************************************************************/
/************************ Macros/Constants ************************************/
/******************************************************************************/

/******************************************************************************/
/*************************** Types Declarations *******************************/
/******************************************************************************/

/* External interrupt init parameters */
static struct irq_init_param ext_int_init_params = {
	.irq_ctrl_id = EXTERNAL_INT_ID1,
	.extra = &ext_int_extra_init_params
};

/* External interrupt callback descriptor */
static struct callback_desc ext_int_callback_desc = {
	data_capture_callback,
	NULL,
	NULL
};

/* PWM init parameters */
static struct pwm_init_param pwm_init_params = {
	.id = EXT_TRIGGER_PIN,                          // GPIO used for PWM
	.period_ns = CONV_TRIGGER_PERIOD_NSEC,          // PWM period in nsec
	.duty_cycle_ns = CONV_TRIGGER_DUTY_CYCLE_NSEC	// PWM duty cycle in nsec
}; 

/* PWM descriptor */
struct pwm_desc *pwm_desc;

/* UART init parameters structure */
struct uart_init_param uart_init_params = {
	.device_id = NULL,
	.baud_rate = IIO_UART_BAUD_RATE,
	.extra = &uart_extra_init_params
};

/* External interrupt descriptor */
struct irq_ctrl_desc *ext_int_desc;

/******************************************************************************/
/************************ Functions Prototypes ********************************/
/******************************************************************************/

/******************************************************************************/
/************************ Functions Definitions *******************************/
/******************************************************************************/

/**
 * @brief 	Initialize the IRQ contoller
 * @return	SUCCESS in case of success, negative error code otherwise.
 * @details	This function initialize the interrupts for system peripherals
 */
static int32_t init_interrupt(void)
{
	do {
		/* Init interrupt controller for external interrupt */
		if (irq_ctrl_init(&ext_int_desc, &ext_int_init_params) != SUCCESS) {
			break;
		}
		/* Register a callback function for external interrupt */
		if (irq_register_callback(ext_int_desc,
			EXTERNAL_INT_ID1,
			&ext_int_callback_desc) != SUCCESS) {
			break;
		}
		return SUCCESS;
	} while (0);

	return FAILURE;
}

/**
 * @brief 	Initializing system peripherals
 * @return	SUCCESS in case of success, negative error code otherwise.
 * @details	This function initializes system peripherals for the application
 */
int32_t init_system(void)
{
	if (init_interrupt() != SUCCESS)
		return FAILURE;

	/* Initialize the PWM interface to generate PWM signal
	 * on conversion trigger event pin */
	if (pwm_init(&pwm_desc, &pwm_init_params) != SUCCESS) {
		return FAILURE;
	}
	
	return SUCCESS;
}