app_config.c

00001 /***************************************************************************//**
00002  *   @file    app_config.c
00003  *   @brief   Application configurations module
00004  *   @details This module contains the configurations needed for IIO application
00005 ********************************************************************************
00006  * Copyright (c) 2020-2022 Analog Devices, Inc.
00007  *
00008  * This software is proprietary to Analog Devices, Inc. and its licensors.
00009  * By using this software you agree to the terms of the associated
00010  * Analog Devices Software License Agreement.
00011 *******************************************************************************/
00012 
00013 /******************************************************************************/
00014 /***************************** Include Files **********************************/
00015 /******************************************************************************/
00016 
00017 #include <stdbool.h>
00018 
00019 #include "app_config.h"
00020 #include "ad4130_data_capture.h"
00021 #include "no_os_error.h"
00022 #include "no_os_uart.h"
00023 #include "no_os_irq.h"
00024 #include "no_os_gpio.h"
00025 
00026 /******************************************************************************/
00027 /************************ Macros/Constants ************************************/
00028 /******************************************************************************/
00029 
00030 /******************************************************************************/
00031 /******************** Variables and User Defined Data Types *******************/
00032 /******************************************************************************/
00033 
00034 /* UART init parameters */
00035 struct no_os_uart_init_param uart_init_params = {
00036     .device_id = NULL,
00037     .baud_rate = IIO_UART_BAUD_RATE,
00038     .size = NO_OS_UART_CS_8,
00039     .parity = NO_OS_UART_PAR_NO,
00040     .stop = NO_OS_UART_STOP_1_BIT,
00041     .extra = &uart_extra_init_params
00042 };
00043 
00044 /* SPI initialization parameters */
00045 struct no_os_spi_init_param spi_init_params = {
00046     .max_speed_hz = 10000000,       // Max SPI Speed
00047     .chip_select = SPI_CSB,         // Chip Select
00048     .mode = NO_OS_SPI_MODE_3,       // CPOL = 1, CPHA = 1
00049     .platform_ops = &spi_ops,
00050     .extra = &spi_extra_init_params // SPI extra configurations
00051 };
00052 
00053 /* External interrupt init parameters */
00054 static struct no_os_irq_init_param ext_int_init_params = {
00055     .irq_ctrl_id = 0,
00056     .platform_ops = &irq_ops,
00057     .extra = &ext_int_extra_init_params
00058 };
00059 
00060 /* External interrupt callback descriptor */
00061 static struct no_os_callback_desc ext_int_callback_desc = {
00062 #if (DATA_CAPTURE_MODE == CONTINUOUS_DATA_CAPTURE)
00063     data_capture_callback,
00064 #elif (DATA_CAPTURE_MODE == FIFO_DATA_CAPTURE)
00065     fifo_data_capture_callback,
00066 #else
00067     NULL,
00068 #endif
00069     NULL,
00070     NULL
00071 };
00072 
00073 /* Conversion monitor GPO init parameters */
00074 static struct no_os_gpio_init_param conv_mon_gpio_init_params = {
00075     .number = CONV_MON,
00076     .platform_ops = &gpio_ops,
00077     .extra = NULL
00078 };
00079 
00080 /* UART descriptor */
00081 struct no_os_uart_desc *uart_desc;
00082 
00083 /* External interrupt descriptor */
00084 struct no_os_irq_ctrl_desc *external_int_desc;
00085 
00086 /* LED GPO descriptor */
00087 struct no_os_gpio_desc *conv_mon_gpio_desc = NULL;
00088 
00089 /******************************************************************************/
00090 /************************ Functions Prototypes ********************************/
00091 /******************************************************************************/
00092 
00093 /******************************************************************************/
00094 /************************ Functions Definitions *******************************/
00095 /******************************************************************************/
00096 
00097 /**
00098  * @brief   Initialize the GPIOs
00099  * @return  0 in case of success, negative error code otherwise
00100  */
00101 static int32_t init_gpio(void)
00102 {
00103     int32_t ret;
00104 
00105     /* Initialize the conversion monitor GPO */
00106     ret = no_os_gpio_get_optional(&conv_mon_gpio_desc,
00107                       &conv_mon_gpio_init_params);
00108     if (ret) {
00109         return ret;
00110     }
00111 
00112     ret = no_os_gpio_direction_input(conv_mon_gpio_desc);
00113     if (ret) {
00114         return ret;
00115     }
00116 
00117     return 0;
00118 }
00119 
00120 /**
00121  * @brief   Initialize the UART peripheral
00122  * @return  0 in case of success, negative error code otherwise
00123  */
00124 static int32_t init_uart(void)
00125 {
00126     return no_os_uart_init(&uart_desc, &uart_init_params);
00127 }
00128 
00129 /**
00130  * @brief   Initialize the IRQ contoller
00131  * @return  0 in case of success, negative error code otherwise
00132  */
00133 static int32_t init_interrupt(void)
00134 {
00135     int32_t ret;
00136 
00137 #if (DATA_CAPTURE_MODE != BURST_DATA_CAPTURE_MODE)
00138     /* Init interrupt controller for external interrupt (for monitoring
00139      * conversion event on BUSY pin) */
00140     ext_int_extra_init_params.gpio_irq_pin = CONV_MON;
00141     ret = no_os_irq_ctrl_init(&external_int_desc, &ext_int_init_params);
00142     if (ret) {
00143         return ret;
00144     }
00145 
00146     /* Register a callback function for external interrupt */
00147     ret = no_os_irq_register_callback(external_int_desc,
00148                       EXT_INT_ID,
00149                       &ext_int_callback_desc);
00150     if (ret) {
00151         return ret;
00152     }
00153 
00154     ret = no_os_irq_trigger_level_set(external_int_desc,
00155                       EXT_INT_ID, NO_OS_IRQ_EDGE_RISING);
00156     if (ret) {
00157         return ret;
00158     }
00159 
00160     /* Enable external interrupt */
00161     ret = no_os_irq_enable(external_int_desc, EXT_INT_ID);
00162     if (ret) {
00163         return ret;
00164     }
00165 #endif
00166 
00167     return 0;
00168 }
00169 
00170 /**
00171  * @brief   Initialize the system peripherals
00172  * @return  0 in case of success, negative error code otherwise
00173  */
00174 int32_t init_system(void)
00175 {
00176     int32_t ret;
00177 
00178     ret = init_gpio();
00179     if (ret) {
00180         return ret;
00181     }
00182 
00183     ret = init_uart();
00184     if (ret) {
00185         return ret;
00186     }
00187 
00188     ret = init_interrupt();
00189     if (ret) {
00190         return ret;
00191     }
00192 
00193 #if defined(USE_SDRAM_CAPTURE_BUFFER)
00194     ret = sdram_init();
00195     if (ret) {
00196         return ret;
00197     }
00198 #endif
00199 
00200     return 0;
00201 }