249 lines
8.2 KiB
C
249 lines
8.2 KiB
C
/**
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******************************************************************************
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* @file ADC/ADC_RegularConversion_DMA/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to use the DMA to transfer
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* continuously converted data.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup ADC_RegularConversion_DMA
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* ADC handler declaration */
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ADC_HandleTypeDef AdcHandle;
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/* Variable used to get converted value */
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__IO uint16_t uhADCxConvertedValue = 0;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program.
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* @param None
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* @retval None
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*/
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int main(void)
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{
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ADC_ChannelConfTypeDef sConfig;
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/* STM32F4xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure LED1 and LED2 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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/* Configure the system clock to 180 MHz */
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SystemClock_Config();
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/*##-1- Configure the ADC peripheral #######################################*/
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AdcHandle.Instance = ADCx;
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AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
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AdcHandle.Init.ScanConvMode = DISABLE; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
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AdcHandle.Init.ContinuousConvMode = ENABLE; /* Continuous mode disabled to have only 1 conversion at each conversion trig */
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AdcHandle.Init.DiscontinuousConvMode = DISABLE; /* Parameter discarded because sequencer is disabled */
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AdcHandle.Init.NbrOfDiscConversion = 0;
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AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Conversion start triggered at each external event */
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AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
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AdcHandle.Init.NbrOfConversion = 1;
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AdcHandle.Init.DMAContinuousRequests = ENABLE;
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AdcHandle.Init.EOCSelection = DISABLE;
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if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
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{
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/* ADC initialization Error */
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Error_Handler();
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}
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/*##-2- Configure ADC regular channel ######################################*/
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sConfig.Channel = ADC_CHANNEL_10;
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
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sConfig.Offset = 0;
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if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
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{
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/* Channel Configuration Error */
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Error_Handler();
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}
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/*##-3- Start the conversion process #######################################*/
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/* Note: Considering IT occurring after each number of ADC conversions */
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/* (IT by DMA end of transfer), select sampling time and ADC clock */
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/* with sufficient duration to not create an overhead situation in */
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/* IRQHandler. */
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if(HAL_ADC_Start_DMA(&AdcHandle, (uint32_t*)&uhADCxConvertedValue, 1) != HAL_OK)
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{
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/* Start Conversation Error */
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Error_Handler();
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}
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 180000000
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* HCLK(Hz) = 180000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 8000000
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* PLL_M = 8
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* PLL_N = 360
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* PLL_P = 2
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* PLL_Q = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 360;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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if(HAL_PWREx_EnableOverDrive() != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED2 on */
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BSP_LED_On(LED2);
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while (1)
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{
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}
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}
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/**
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* @brief Conversion complete callback in non blocking mode
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* @param AdcHandle : AdcHandle handle
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* @note This example shows a simple way to report end of conversion, and
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* you can add your own implementation.
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* @retval None
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*/
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void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)
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{
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/* Turn LED1 on: Transfer process is correct */
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BSP_LED_On(LED1);
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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