mirror of
https://github.com/STMicroelectronics/STM32CubeF0.git
synced 2025-05-03 22:17:10 +08:00
228 lines
8.1 KiB
C
228 lines
8.1 KiB
C
/**
|
|
******************************************************************************
|
|
* @file ADC/ADC_DMA_Transfer/Src/main.c
|
|
* @author MCD Application Team
|
|
* @brief This example describes how to use the DMA to convert continuously data.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© Copyright (c) 2016 STMicroelectronics.
|
|
* All rights reserved.</center></h2>
|
|
*
|
|
* This software component is licensed by ST under BSD 3-Clause license,
|
|
* the "License"; You may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at:
|
|
* opensource.org/licenses/BSD-3-Clause
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "main.h"
|
|
|
|
/** @addtogroup STM32F0xx_HAL_Examples
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup ADC_DMA_Transfer
|
|
* @{
|
|
*/
|
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
/* Private define ------------------------------------------------------------*/
|
|
|
|
/* Definitions of data related to this example */
|
|
/* Definition of ADCx conversions data table size */
|
|
#define ADC_CONVERTED_DATA_BUFFER_SIZE ((uint32_t) 32) /* Size of array aADCxConvertedData[] */
|
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* ADC handle declaration */
|
|
ADC_HandleTypeDef AdcHandle;
|
|
|
|
/* ADC channel configuration structure declaration */
|
|
ADC_ChannelConfTypeDef sConfig;
|
|
|
|
/* Variable containing ADC conversions data */
|
|
static uint16_t aADCxConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE];
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
void SystemClock_Config(void);
|
|
static void Error_Handler(void);
|
|
|
|
/* Private functions ---------------------------------------------------------*/
|
|
|
|
/**
|
|
* @brief Main program.
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
int main(void)
|
|
{
|
|
/* This sample code shows how to convert an analog input and read the converted
|
|
data using DMA transfer.
|
|
To proceed, 4 steps are required: */
|
|
|
|
/* STM32F0xx HAL library initialization:
|
|
- Configure the Flash prefetch
|
|
- Systick timer is configured by default as source of time base, but user
|
|
can eventually implement his proper time base source (a general purpose
|
|
timer for example or other time source), keeping in mind that Time base
|
|
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
|
|
handled in milliseconds basis.
|
|
- Low Level Initialization
|
|
*/
|
|
HAL_Init();
|
|
|
|
/* Configure the system clock to 48 MHz */
|
|
SystemClock_Config();
|
|
|
|
|
|
/* ### - 1 - Initialize ADC peripheral #################################### */
|
|
|
|
AdcHandle.Instance = ADCx;
|
|
if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK)
|
|
{
|
|
/* ADC de-initialization Error */
|
|
Error_Handler();
|
|
}
|
|
|
|
AdcHandle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2; /* Synchronous clock mode, input ADC clock with prscaler 2 */
|
|
|
|
AdcHandle.Init.Resolution = ADC_RESOLUTION_12B; /* 12-bit resolution for converted data */
|
|
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT; /* Right-alignment for converted data */
|
|
AdcHandle.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
|
|
AdcHandle.Init.EOCSelection = ADC_EOC_SINGLE_CONV; /* EOC flag picked-up to indicate conversion end */
|
|
AdcHandle.Init.LowPowerAutoPowerOff = DISABLE;
|
|
AdcHandle.Init.LowPowerAutoWait = DISABLE; /* Auto-delayed conversion feature disabled */
|
|
AdcHandle.Init.ContinuousConvMode = ENABLE; /* Continuous mode enabled (automatic conversion restart after each conversion) */
|
|
AdcHandle.Init.DiscontinuousConvMode = DISABLE; /* Parameter discarded because sequencer is disabled */
|
|
AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START; /* Software start to trig the 1st conversion manually, without external event */
|
|
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
|
|
AdcHandle.Init.DMAContinuousRequests = ENABLE; /* ADC DMA continuous request to match with DMA circular mode */
|
|
AdcHandle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; /* DR register is overwritten with the last conversion result in case of overrun */
|
|
AdcHandle.Init.SamplingTimeCommon = ADC_SAMPLETIME_55CYCLES_5;
|
|
|
|
/* Initialize ADC peripheral according to the passed parameters */
|
|
if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
|
|
/* ### - 2 - Start calibration ############################################ */
|
|
if (HAL_ADCEx_Calibration_Start(&AdcHandle) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/* ### - 3 - Channel configuration ######################################## */
|
|
sConfig.Channel = ADCx_CHANNEL; /* Channel to be converted */
|
|
sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
|
|
if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/* ### - 4 - Start conversion in DMA mode ################################# */
|
|
if (HAL_ADC_Start_DMA(&AdcHandle,
|
|
(uint32_t *)aADCxConvertedData,
|
|
ADC_CONVERTED_DATA_BUFFER_SIZE
|
|
) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/* Infinite Loop */
|
|
while (1)
|
|
{
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief System Clock Configuration
|
|
* The system Clock is configured as follow :
|
|
* System Clock source = PLL (HSI/2)
|
|
* SYSCLK(Hz) = 48000000
|
|
* HCLK(Hz) = 48000000
|
|
* AHB Prescaler = 1
|
|
* APB1 Prescaler = 1
|
|
* HSI Frequency(Hz) = 8000000
|
|
* PREDIV = 1
|
|
* PLLMUL = 12
|
|
* Flash Latency(WS) = 1
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
void SystemClock_Config(void)
|
|
{
|
|
RCC_ClkInitTypeDef RCC_ClkInitStruct;
|
|
RCC_OscInitTypeDef RCC_OscInitStruct;
|
|
|
|
/* No HSE Oscillator on Nucleo, Activate PLL with HSI/2 as source */
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
|
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
|
|
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
|
|
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
|
|
if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
while(1);
|
|
}
|
|
|
|
/* Select PLL as system clock source and configure the HCLK, PCLK1 clocks dividers */
|
|
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
|
|
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
|
|
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
|
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
|
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
while(1);
|
|
}
|
|
}
|
|
/**
|
|
* @brief This function is executed in case of error occurrence.
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void Error_Handler(void)
|
|
{
|
|
while (1)
|
|
{
|
|
}
|
|
}
|
|
|
|
#ifdef USE_FULL_ASSERT
|
|
|
|
/**
|
|
* @brief Reports the name of the source file and the source line number
|
|
* where the assert_param error has occurred.
|
|
* @param file: pointer to the source file name
|
|
* @param line: assert_param error line source number
|
|
* @retval None
|
|
*/
|
|
void assert_failed(uint8_t *file, uint32_t line)
|
|
{
|
|
/* User can add his own implementation to report the file name and line number,
|
|
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
|
|
|
|
/* Infinite loop */
|
|
while (1)
|
|
{
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|