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[STM32U5] 【NUCLEO-U575ZI-Q测评】DAC

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 楼主| dql2015 发表于 2023-2-25 12:42 | 显示全部楼层 |阅读模式
AC, DAC, NUC, Nucleo
STM32U5内置了DAC、运算放大器等常用模拟外设，其中运放具有多种输入源、可以配置成多种工作模式，这里将运放配置为电压跟随器模式，输入信号为DAC输出，这样能够提高带负载能力。
DAC配置：
11.png
运放配置：
22.png
主要代码：
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  1. /* USER CODE BEGIN Header */
    

  2. /**
    

  3.   ******************************************************************************
    

  4.   * [url=home.php?mod=space&uid=288409]@file[/url]           : main.c
    

  5.   * [url=home.php?mod=space&uid=247401]@brief[/url]          : Main program body
    

  6.   ******************************************************************************
    

  7.   * @attention
    

  8.   *
    

  9.   * Copyright (c) 2023 STMicroelectronics.
    

  10.   * All rights reserved.
    

  11.   *
    

  12.   * This software is licensed under terms that can be found in the LICENSE file
    

  13.   * in the root directory of this software component.
    

  14.   * If no LICENSE file comes with this software, it is provided AS-IS.
    

  15.   *
    

  16.   ******************************************************************************
    

  17.   */
    

  18. /* USER CODE END Header */
    

  19. /* Includes ------------------------------------------------------------------*/
    

  20. #include "main.h"
    

  21. #include "adc.h"
    

  22. #include "dac.h"
    

  23. #include "opamp.h"
    

  24. #include "ucpd.h"
    

  25. #include "usart.h"
    

  26. #include "usb_otg.h"
    

  27. #include "gpio.h"
    


  28. 

  29. /* Private includes ----------------------------------------------------------*/
    

  30. /* USER CODE BEGIN Includes */
    


  31. 

  32. /* USER CODE END Includes */
    


  33. 

  34. /* Private typedef -----------------------------------------------------------*/
    

  35. /* USER CODE BEGIN PTD */
    


  36. 

  37. /* USER CODE END PTD */
    


  38. 

  39. /* Private define ------------------------------------------------------------*/
    

  40. /* USER CODE BEGIN PD */
    

  41. /* USER CODE END PD */
    


  42. 

  43. /* Private macro -------------------------------------------------------------*/
    

  44. /* USER CODE BEGIN PM */
    


  45. 

  46. /* USER CODE END PM */
    


  47. 

  48. /* Private variables ---------------------------------------------------------*/
    


  49. 

  50. /* USER CODE BEGIN PV */
    

  51. extern int32_t fft_test(void);
    


  52. 

  53. uint32_t Wave_LUT[128] = {
    

  54.     2048, 2149, 2250, 2350, 2450, 2549, 2646, 2742, 2837, 2929, 3020, 3108, 3193, 3275, 3355,
    

  55.     3431, 3504, 3574, 3639, 3701, 3759, 3812, 3861, 3906, 3946, 3982, 4013, 4039, 4060, 4076,
    

  56.     4087, 4094, 4095, 4091, 4082, 4069, 4050, 4026, 3998, 3965, 3927, 3884, 3837, 3786, 3730,
    

  57.     3671, 3607, 3539, 3468, 3394, 3316, 3235, 3151, 3064, 2975, 2883, 2790, 2695, 2598, 2500,
    

  58.     2400, 2300, 2199, 2098, 1997, 1896, 1795, 1695, 1595, 1497, 1400, 1305, 1212, 1120, 1031,
    

  59.     944, 860, 779, 701, 627, 556, 488, 424, 365, 309, 258, 211, 168, 130, 97,
    

  60.     69, 45, 26, 13, 4, 0, 1, 8, 19, 35, 56, 82, 113, 149, 189,
    

  61.     234, 283, 336, 394, 456, 521, 591, 664, 740, 820, 902, 987, 1075, 1166, 1258,
    

  62.     1353, 1449, 1546, 1645, 1745, 1845, 1946, 2047
    

  63. };
    


  64. 

  65. /* USER CODE END PV */
    


  66. 

  67. /* Private function prototypes -----------------------------------------------*/
    

  68. void SystemClock_Config(void);
    

  69. static void SystemPower_Config(void);
    

  70. /* USER CODE BEGIN PFP */
    


  71. 

  72. /* USER CODE END PFP */
    


  73. 

  74. /* Private user code ---------------------------------------------------------*/
    

  75. /* USER CODE BEGIN 0 */
    

  76. uint32_t TM_DELAY_Init(void) 
    

  77. {
    

  78.   uint32_t c;     
    

  79.         /* Enable TRC */
    

  80.         CoreDebug->DEMCR &= ~0x01000000;
    

  81.         CoreDebug->DEMCR |=  0x01000000;
    


  82. 

  83.         /* Enable counter */
    

  84.         DWT->CTRL &= ~0x00000001;
    

  85.         DWT->CTRL |=  0x00000001;
    


  86. 

  87.         /* Reset counter */
    

  88.         DWT->CYCCNT = 0;
    


  89. 

  90.         /* Check if DWT has started */
    

  91.         c = DWT->CYCCNT;
    


  92. 

  93.         /* 2 dummys */
    

  94.         __ASM volatile ("NOP");
    

  95.         __ASM volatile ("NOP");
    


  96. 

  97.         /* Return difference, if result is zero, DWT has not started */
    

  98.         return (DWT->CYCCNT - c);
    

  99. }
    

  100. void Delay(__IO uint32_t micros) 
    

  101. {
    

  102.         uint32_t start = DWT->CYCCNT;
    


  103. 

  104.         /* Go to number of cycles for system */
    

  105.         micros *= (HAL_RCC_GetHCLKFreq() / 1000000);
    


  106. 

  107.         /* Delay till end */
    

  108.         while ((DWT->CYCCNT - start) < micros);
    

  109. }
    

  110. /* USER CODE END 0 */
    


  111. 

  112. /**
    

  113.   * @brief  The application entry point.
    

  114.   * @retval int
    

  115.   */
    

  116. int main(void)
    

  117. {
    

  118.   /* USER CODE BEGIN 1 */
    


  119. 

  120.   /* USER CODE END 1 */
    


  121. 

  122.   /* MCU Configuration--------------------------------------------------------*/
    


  123. 

  124.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    

  125.   HAL_Init();
    


  126. 

  127.   /* USER CODE BEGIN Init */
    


  128. 

  129.   /* USER CODE END Init */
    


  130. 

  131.   /* Configure the system clock */
    

  132.   SystemClock_Config();
    


  133. 

  134.   /* Configure the System Power */
    

  135.   SystemPower_Config();
    


  136. 

  137.   /* USER CODE BEGIN SysInit */
    


  138. 

  139.   /* USER CODE END SysInit */
    


  140. 

  141.   /* Initialize all configured peripherals */
    

  142.   MX_GPIO_Init();
    

  143.   MX_UCPD1_Init();
    

  144.   MX_USART1_UART_Init();
    

  145.   MX_USB_OTG_FS_PCD_Init();
    

  146.   MX_ADC1_Init();
    

  147.   MX_OPAMP1_Init();
    

  148.   MX_DAC1_Init();
    

  149.   /* USER CODE BEGIN 2 */
    

  150.         HAL_OPAMP_Start(&hopamp1);
    

  151.         HAL_DAC_Start(&hdac1, DAC_CHANNEL_1);
    

  152.         HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_1, DAC_ALIGN_12B_R, 2000);
    

  153.         
    

  154.         EventRecorderInitialize(EventRecordAll, 1U);
    

  155.         EventRecorderStart();
    


  156. 

  157.         TM_DELAY_Init();
    

  158.         
    

  159.         printf("__FPU_PRESENT=%d __FPU_USED=%d\r\n",__FPU_PRESENT,__FPU_USED);
    

  160.         
    

  161.         //arm_cfft_f32_app();
    


  162. 

  163.         int i=0;
    

  164.   /* USER CODE END 2 */
    


  165. 

  166.   /* Infinite loop */
    

  167.   /* USER CODE BEGIN WHILE */
    

  168.   while (1)
    

  169.   {
    

  170.     /* USER CODE END WHILE */
    


  171. 

  172.     /* USER CODE BEGIN 3 */
    

  173.                 //for(int i=0;i<128;i++)
    

  174.                 {
    

  175.                         HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_1, DAC_ALIGN_12B_R, i);
    

  176.                         i+=100;
    

  177.                         if(i>4095)
    

  178.                                 i=0;
    

  179.                         HAL_Delay(100);
    

  180.                 }
    

  181.                 //i=0;        
    

  182.   }
    

  183.   /* USER CODE END 3 */
    

  184. }
    


  185. 

  186. /**
    

  187.   * @brief System Clock Configuration
    

  188.   * @retval None
    

  189.   */
    

  190. void SystemClock_Config(void)
    

  191. {
    

  192.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    

  193.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    


  194. 

  195.   /** Configure the main internal regulator output voltage
    

  196.   */
    

  197.   if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
    

  198.   {
    

  199.     Error_Handler();
    

  200.   }
    


  201. 

  202.   /** Initializes the CPU, AHB and APB buses clocks
    

  203.   */
    

  204.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48|RCC_OSCILLATORTYPE_HSI
    

  205.                               |RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI;
    

  206.   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    

  207.   RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
    

  208.   RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    

  209.   RCC_OscInitStruct.LSIState = RCC_LSI_ON;
    

  210.   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
    

  211.   RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
    

  212.   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;
    

  213.   RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1;
    

  214.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    

  215.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
    

  216.   RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;
    

  217.   RCC_OscInitStruct.PLL.PLLM = 1;
    

  218.   RCC_OscInitStruct.PLL.PLLN = 80;
    

  219.   RCC_OscInitStruct.PLL.PLLP = 2;
    

  220.   RCC_OscInitStruct.PLL.PLLQ = 2;
    

  221.   RCC_OscInitStruct.PLL.PLLR = 2;
    

  222.   RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;
    

  223.   RCC_OscInitStruct.PLL.PLLFRACN = 0;
    

  224.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    

  225.   {
    

  226.     Error_Handler();
    

  227.   }
    


  228. 

  229.   /** Initializes the CPU, AHB and APB buses clocks
    

  230.   */
    

  231.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
    

  232.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
    

  233.                               |RCC_CLOCKTYPE_PCLK3;
    

  234.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    

  235.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    

  236.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    

  237.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    

  238.   RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
    


  239. 

  240.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
    

  241.   {
    

  242.     Error_Handler();
    

  243.   }
    

  244. }
    


  245. 

  246. /**
    

  247.   * @brief Power Configuration
    

  248.   * @retval None
    

  249.   */
    

  250. static void SystemPower_Config(void)
    

  251. {
    

  252.   HAL_PWREx_EnableVddIO2();
    


  253. 

  254.   /*
    

  255.    * Switch to SMPS regulator instead of LDO
    

  256.    */
    

  257.   if (HAL_PWREx_ConfigSupply(PWR_SMPS_SUPPLY) != HAL_OK)
    

  258.   {
    

  259.     Error_Handler();
    

  260.   }
    

  261. }
    


  262. 

  263. /* USER CODE BEGIN 4 */
    


  264. 

  265. /* USER CODE END 4 */
    


  266. 

  267. /**
    

  268.   * @brief  This function is executed in case of error occurrence.
    

  269.   * @retval None
    

  270.   */
    

  271. void Error_Handler(void)
    

  272. {
    

  273.   /* USER CODE BEGIN Error_Handler_Debug */
    

  274.   /* User can add his own implementation to report the HAL error return state */
    

  275.   __disable_irq();
    

  276.   while (1)
    

  277.   {
    

  278.   }
    

  279.   /* USER CODE END Error_Handler_Debug */
    

  280. }
    


  281. 

  282. #ifdef  USE_FULL_ASSERT
    

  283. /**
    

  284.   * @brief  Reports the name of the source file and the source line number
    

  285.   *         where the assert_param error has occurred.
    

  286.   * @param  file: pointer to the source file name
    

  287.   * @param  line: assert_param error line source number
    

  288.   * @retval None
    

  289.   */
    

  290. void assert_failed(uint8_t *file, uint32_t line)
    

  291. {
    

  292.   /* USER CODE BEGIN 6 */
    

  293.   /* User can add his own implementation to report the file name and line number,
    

  294.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    

  295.   /* USER CODE END 6 */
    

  296. }
    

  297. #endif /* USE_FULL_ASSERT */


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Undshing 发表于 2024-1-12 16:28 | 显示全部楼层
这个dac跟pwm有什么区别啊
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