[STM32F4xx] DAC DMA SINE Wave generator (참고 사이트)

http://www.muhittinkaplan.com/?p=729

DAC DMA 2CH Sine wave generator "main.c" 코드 내용.

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * COPYRIGHT(c) 2017 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f4xx_hal.h"
 
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private variables ---------------------------------------------------------*/
DAC_HandleTypeDef hdac;
DMA_HandleTypeDef hdma_dac1;
DMA_HandleTypeDef hdma_dac2;
 
TIM_HandleTypeDef htim2;
 
UART_HandleTypeDef huart2;
 
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
 
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_DAC_Init(void);
static void MX_TIM2_Init(void);
static void MX_USART2_UART_Init(void);
                                    
void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);
                                
 
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
 
/* USER CODE END PFP */
 
/* USER CODE BEGIN 0 */
#ifdef __GNUC__
 #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
 #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif
 
PUTCHAR_PROTOTYPE
{
 HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 1);
 return ch;
}
 
float sine_rate[32] = {0, -0.195, -0.383, -0.555, -0.707, -0.831,
                                            -0.924, -0.981, -1, -0.981, -0.924, -0.831, 
                                            -0.707, -0.555, -0.383, -0.195,
                                             0, 0.195, 0.383, 0.555, 0.707, 0.831,
                                             0.924,  0.981,  1,  0.981,  0.924,  0.831,
                                             0.707,  0.555,  0.383,  0.195};
 
uint16_t sine_wave_array[32];/* = {2047, 1648, 1264, 910, 600,  345,
                   156, 39,  0,  39,  156,  345,
                   600, 910, 1264, 1648, 2048, 2447,
                   2831, 3185, 3495, 3750, 3939, 4056,
                   4095, 4056, 3939, 3750, 3495, 3185,
                   2831, 2447};*/
 
uint16_t sine_wave_array2[32];/* = {2047, 1648, 1264, 910, 600,  345,
                   156, 39,  0,  39,  156,  345,
                   600, 910, 1264, 1648, 2048, 2447,
                   2831, 3185, 3495, 3750, 3939, 4056,
                   4095, 4056, 3939, 3750, 3495, 3185,
                   2831, 2447};*/
 
/* USER CODE END 0 */
 
int main(void)
{
 
  /* USER CODE BEGIN 1 */
 
  /* USER CODE END 1 */
 
  /* MCU Configuration----------------------------------------------------------*/
 
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
 
  /* Configure the system clock */
  SystemClock_Config();
 
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_DAC_Init();
  MX_TIM2_Init();
  MX_USART2_UART_Init();
 
  /* USER CODE BEGIN 2 */
    uint32_t i,shift_phase;
    uint16_t offset_CH1,offset_CH2,period_Hz;
    float amplitude_CH1,amplitude_CH2;
    
    amplitude_CH1 = 1000; // 1.5V(1861) , 1.0V(1241) , 0.5V(620) , 0.2(248)
    offset_CH1 = 1861;    // 1.5V
    
    amplitude_CH2 = 300; // 1.5V(1861) , 1.0V(1241) , 0.5V(620) , 0.2(248)
    offset_CH2 = 1861;    // 1.5V
    
    period_Hz = 60;    // 60Hz
    
    
  htim2.Init.Period = (uint32_t)(1000000.0 / ((float)period_Hz*32.0));
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
 
    shift_phase = 4;
    for (i=0;i<32;i++)
    {
        sine_wave_array[i] = offset_CH1+(int16_t)(amplitude_CH1*sine_rate[i]);
        sine_wave_array2[i] =  offset_CH2+(int16_t)(amplitude_CH2*sine_rate[(i+shift_phase)%32]);
    }
    
    for(i=0;i<32;i++)
    {
        printf("[%2d] sine rate %4d, [%4.3f]\r\n",i,((int16_t)sine_wave_array[i]-2047),((float)((int16_t)sine_wave_array[i]-2047))/2047);
        //printf("[%2d] sine rate %4d\r\n",i,((int16_t)sine_wave_array[i]-2047));
    }
    
    HAL_TIM_Base_Start(&htim2);
    HAL_TIM_OC_Start(&htim2,TIM_CHANNEL_1);
  //  HAL_DAC_Start(&hdac,DAC1_CHANNEL_1);
    HAL_DAC_Start_DMA(&hdac,DAC_CHANNEL_1,(uint32_t *)sine_wave_array,32,DAC_ALIGN_12B_R);
    HAL_DAC_Start_DMA(&hdac,DAC_CHANNEL_2,(uint32_t *)sine_wave_array2,32,DAC_ALIGN_12B_R);
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
      HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_12);
      HAL_Delay(100);
    
  /* USER CODE END WHILE */
 
  /* USER CODE BEGIN 3 */
 
  }
  /* USER CODE END 3 */
 
}
 
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
 
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
 
    /**Configure the main internal regulator output voltage 
    */
  __HAL_RCC_PWR_CLK_ENABLE();
 
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 
    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 180;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 2;
  RCC_OscInitStruct.PLL.PLLR = 2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
 
    /**Activate the Over-Drive mode 
    */
  if (HAL_PWREx_EnableOverDrive() != HAL_OK)
  {
    Error_Handler();
  }
 
    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
 
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
 
    /**Configure the Systick interrupt time 
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 
    /**Configure the Systick 
    */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 
  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
 
/* DAC init function */
static void MX_DAC_Init(void)
{
 
  DAC_ChannelConfTypeDef sConfig;
 
    /**DAC Initialization 
    */
  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }
 
    /**DAC channel OUT1 config 
    */
  sConfig.DAC_Trigger = DAC_TRIGGER_T2_TRGO;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
 
    /**DAC channel OUT2 config 
    */
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
 
}
 
/* TIM2 init function */
static void MX_TIM2_Init(void)
{
 
  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
  TIM_OC_InitTypeDef sConfigOC;
 
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 90;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 1000;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
 
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
 
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
 
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 50;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
 
  HAL_TIM_MspPostInit(&htim2);
 
}
 
/* USART2 init function */
static void MX_USART2_UART_Init(void)
{
 
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
 
}
 
/** 
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();
 
  /* DMA interrupt init */
  /* DMA1_Stream5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 3, 0);
  HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
  /* DMA1_Stream6_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Stream6_IRQn, 3, 0);
  HAL_NVIC_EnableIRQ(DMA1_Stream6_IRQn);
 
}
 
/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void)
{
 
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
 
}
 
/* USER CODE BEGIN 4 */
 
/* USER CODE END 4 */
 
/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler */ 
}
 
#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 CODE BEGIN 6 */
  /* 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) */
  /* USER CODE END 6 */
 
}
 
#endif
 
/**
  * @}
  */ 
 
/**
  * @}
*/ 
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 

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