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自己做的USB声卡，stm32f103rbt6源码

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楼主
ID:407262 发表于 2018-10-9 21:33 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
USB声卡，用STM32F103RBT6制作，使用TIM驱动IO，PWM方式推挽音频输出，驱动8欧姆的喇叭不成问题，仅作为桌面音源使用。

单片机源程序如下:
  1. /* Includes ------------------------------------------------------------------*/
  2. #include "stm32f1xx_hal.h"
  3. #include "usb_device.h"

  5. /* USER CODE BEGIN Includes */
  6. #include "uart_printf.h"
  7. #include "usbd_audio.h"
  8. /* USER CODE END Includes */

  10. /* Private variables ---------------------------------------------------------*/
  11. volatile USBD_HandleTypeDef hUsbDeviceFS;
  12. UART_HandleTypeDef huart1;
  13. TIM_HandleTypeDef htim2;
  14. TIM_HandleTypeDef htim3;
  15. TIM_HandleTypeDef htim4;
  16. volatile uint8_t Mute;
  17. uint8_t buffer[AUDIO_TOTAL_BUF_SIZE];

  19. /* USER CODE BEGIN PV */
  20. /* Private variables ---------------------------------------------------------*/

  22. /* USER CODE END PV */

  24. /* Private function prototypes -----------------------------------------------*/
  25. void SystemClock_Config(void);
  26. void Error_Handler(void);
  27. static void MX_GPIO_Init(void);
  28. static void MX_TIM3_Init(void);
  29. static void MX_TIM4_Init(void);
  30. static void MX_TIM2_Init(void);
  31. static void MX_USART1_UART_Init(void);


  34. void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);
  35. /* USER CODE BEGIN PFP */
  36. /* Private function prototypes -----------------------------------------------*/

  38. /* USER CODE END PFP */

  40. /* USER CODE BEGIN 0 */
  41. void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
  42. {
  43.         uint8_t data_tmp;
  44.         if(htim->Instance == TIM2)
  45.         {
  46.                 USBD_AUDIO_HandleTypeDef *haudio = (USBD_AUDIO_HandleTypeDef*)(hUsbDeviceFS.pClassData);
  47.                 if(haudio->rd_enable == 1)
  48.                 {
  49.                         //if(haudio->data_len >= 4)
  50.                         {
  51.                                 uint8_t pulse, pulsen;
  52.                                 haudio->rd_ptr++;
  53.                                 data_tmp = buffer[haudio->rd_ptr & (AUDIO_TOTAL_BUF_SIZE - 1)];
  54.                                 pulse = (uint8_t)(data_tmp + 0x80);
  55.                                 pulsen = (uint8_t)((~data_tmp) + 0x80);
  56.                                 TIM3->CCR3 = pulse;
  57.                                 TIM3->CCR4 = pulsen;
  58.                                 haudio->rd_ptr++;
  59.                                 haudio->rd_ptr++;
  60.                                 data_tmp = buffer[haudio->rd_ptr & (AUDIO_TOTAL_BUF_SIZE - 1)];
  61.                                 pulse = (uint8_t)(data_tmp + 0x80);
  62.                                 pulsen = (uint8_t)((~data_tmp) + 0x80);
  63.                                 TIM4->CCR3 = pulse;
  64.                                 TIM4->CCR4 = pulsen;
  65.                                 haudio->rd_ptr++;
  66.                                 haudio->rd_ptr &= (2 * AUDIO_TOTAL_BUF_SIZE -1);
  67.                                 if(haudio->rd_ptr == haudio->wr_ptr)
  68.                                         haudio->rd_enable = 0;
  69.                         }
  70.                 }
  71.         }
  72. }
  73. /* USER CODE END 0 */

  75. int main(void)
  76. {
  77.   /* USER CODE BEGIN 1 */

  79.   /* USER CODE END 1 */

  81.   /* MCU Configuration----------------------------------------------------------*/

  83.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  84.   HAL_Init();

  86.   /* Configure the system clock */
  87.   SystemClock_Config();

  89.   /* Initialize all configured peripherals */
  90.   MX_GPIO_Init();
  91.   MX_USART1_UART_Init();
  92.   MX_TIM3_Init();
  93.         MX_TIM4_Init();
  94.   MX_TIM2_Init();
  95.   MX_USB_DEVICE_Init();

  97.   /* USER CODE BEGIN 2 */
  98.         Mute = 0;
  99.   /* USER CODE END 2 */

  101.   /* Infinite loop */
  102.   /* USER CODE BEGIN WHILE */
  103.   while (1)
  104.   {
  105.   /* USER CODE END WHILE */
  106. //                printf("This is A USB-AUDIO Device\r\n");
  107. //                HAL_Delay(1000);

  109.   /* USER CODE BEGIN 3 */

  111.   }
  112.   /* USER CODE END 3 */

  114. }

  116. /** System Clock Configuration
  117. */
  118. void SystemClock_Config(void)
  119. {
  120.   RCC_OscInitTypeDef RCC_OscInitStruct;
  121.   RCC_ClkInitTypeDef RCC_ClkInitStruct;
  122.   RCC_PeriphCLKInitTypeDef PeriphClkInit;

  124.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  125.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  126.   RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  127.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  128.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  129.   RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  130.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  131.   {
  132.     Error_Handler();
  133.   }

  135.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
  136.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  137.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  138.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  139.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  140.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
  141.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  142.   {
  143.     Error_Handler();
  144.   }

  146.   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
  147.   PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
  148.   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  149.   {
  150.     Error_Handler();
  151.   }

  153.   HAL_RCC_EnableCSS();

  155.   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  157.   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  159.   /* SysTick_IRQn interrupt configuration */
  160.   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
  161. }

  163. /* USART1 init function */
  164. static void MX_USART1_UART_Init(void)
  165. {
  166.   huart1.Instance = USART1;
  167.   huart1.Init.BaudRate = 115200;
  168.   huart1.Init.WordLength = UART_WORDLENGTH_8B;
  169.   huart1.Init.StopBits = UART_STOPBITS_1;
  170.   huart1.Init.Parity = UART_PARITY_NONE;
  171.   huart1.Init.Mode = UART_MODE_TX_RX;
  172.   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  173.   huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  174.   if (HAL_UART_Init(&huart1) != HAL_OK)
  175.   {
  176.     Error_Handler();
  177.   }
  178. }

  180. /* TIM2 init function */
  181. static void MX_TIM2_Init(void)
  182. {
  183.   TIM_ClockConfigTypeDef sClockSourceConfig;
  184.   TIM_MasterConfigTypeDef sMasterConfig;

  186.   htim2.Instance = TIM2;
  187.   htim2.Init.Prescaler = 0;
  188.   htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  189.   htim2.Init.Period = 2249;
  190.   htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  191.   if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  192.   {
  193.     Error_Handler();
  194.   }

  196.   sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  197.   if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  198.   {
  199.     Error_Handler();
  200.   }

  202.   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  203.   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  204.   if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  205.   {
  206.     Error_Handler();
  207.   }
  208. }

  210. /* TIM3 init function */
  211. static void MX_TIM3_Init(void)
  212. {
  213.   TIM_ClockConfigTypeDef sClockSourceConfig;
  214. //  TIM_MasterConfigTypeDef sMasterConfig;
  215.   TIM_OC_InitTypeDef sConfigOC;

  217.   htim3.Instance = TIM3;
  218.   htim3.Init.Prescaler = 0;
  219.   htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  220.   htim3.Init.Period = 255;
  221.   htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  222.   if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
  223.   {
  224.     Error_Handler();
  225.   }

  227.   sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  228.   if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
  229.   {
  230.     Error_Handler();
  231.   }

  233. //  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  234. //  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  235. //  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  236. //  {
  237. //    Error_Handler();
  238. //  }

  240.   sConfigOC.OCMode = TIM_OCMODE_PWM1;
  241.   sConfigOC.Pulse = 0;
  242.   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  243.   sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;
  244.   if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
  245.   {
  246.     Error_Handler();
  247.   }

  249.   if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  250.   {
  251.     Error_Handler();
  252.   }

  254.   HAL_TIM_MspPostInit(&htim3);
  255. }

  257. /* TIM4 init function */
  258. static void MX_TIM4_Init(void)
  259. {

  261.   TIM_ClockConfigTypeDef sClockSourceConfig;
  262. //  TIM_MasterConfigTypeDef sMasterConfig;
  263.   TIM_OC_InitTypeDef sConfigOC;

  265.   htim4.Instance = TIM4;
  266.   htim4.Init.Prescaler = 0;
  267.   htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
  268.   htim4.Init.Period = 255;
  269.   htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  270.   if (HAL_TIM_Base_Init(&htim4) != HAL_OK)
  271.   {
  272.     Error_Handler();
  273.   }

  275.   sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  276.   if (HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig) != HAL_OK)
  277.   {
  278.     Error_Handler();
  279.   }
  280.        
  281. //  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  282. //  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  283. //  if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)
  284. //  {
  285. //    Error_Handler();
  286. //  }

  288.   sConfigOC.OCMode = TIM_OCMODE_PWM1;
  289.   sConfigOC.Pulse = 0;
  290.   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  291.   sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;
  292.   if (HAL_TIM_OC_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
  293.   {
  294.     Error_Handler();
  295.   }

  297.   if (HAL_TIM_OC_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  298.   {
  299.     Error_Handler();
  300.   }

  302.   HAL_TIM_MspPostInit(&htim4);
  303. }

  305. /** Configure pins as
  306.         * Analog
  307.         * Input
  308.         * Output
  309.         * EVENT_OUT
  310.         * EXTI
  311. */
  312. static void MX_GPIO_Init(void)
  313. {

  315.   GPIO_InitTypeDef GPIO_InitStruct;

  317.   /* GPIO Ports Clock Enable */
  318.   __HAL_RCC_GPIOD_CLK_ENABLE();
  319.   __HAL_RCC_GPIOB_CLK_ENABLE();
  320.   __HAL_RCC_GPIOA_CLK_ENABLE();

  322.   /*Configure GPIO pin : PA8 */
  323.   GPIO_InitStruct.Pin = GPIO_PIN_8;
  324.   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  325.   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  326.   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  328.   /*Configure GPIO pin Output Level */
  329.   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);

  331.   /*Configure GPIO pin : PD2 */
  332.   GPIO_InitStruct.Pin = GPIO_PIN_2;
  333.   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  334.   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  335.   HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  337.   /*Configure GPIO pin Output Level */
  338.   HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_SET);

  340. }

  342. /* USER CODE BEGIN 4 */

  344. /* USER CODE END 4 */

  346. /**
  347.   * @brief  This function is executed in case of error occurrence.
  348.   * @param  None
  349.   * @retval None
  350.   */
  351. void Error_Handler(void)
  352. {
  353.   /* USER CODE BEGIN Error_Handler */
  354.   /* User can add his own implementation to report the HAL error return state */
  355.   while(1)
  356.   {
  357.   }
  358.   /* USER CODE END Error_Handler */
  359. }

  361. #ifdef USE_FULL_ASSERT

  363. /**
  364.    * @brief Reports the name of the source file and the source line number
  365.    * where the assert_param error has occurred.
  366.    * @param file: pointer to the source file name
  367.    * @param line: assert_param error line source number
  368.    * @retval None
  369.    */
  370. void assert_failed(uint8_t* file, uint32_t line)
  371. {
  372.   /* USER CODE BEGIN 6 */
  373.   /* User can add his own implementation to report the file name and line number,
  374.     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  375.   /* USER CODE END 6 */

  377. }

  379. #endif

  381. /**
  382.   * @}
  383.   */

  385. /**
  386.   * @}
  387. */

  389. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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所有资料51hei提供下载:
USB_ADUIO_F1(原版PWM).rar (1.75 MB, 下载次数: 52)


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沙发
ID:136005 发表于 2019-2-25 14:26 | 只看该作者
版主可以详细提供一下代码的工作原理不？
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板凳
ID:138119 发表于 2019-5-6 05:15 | 只看该作者
试了，电脑能识别到USB声卡设备，可是放音，除了吱吱的，根根什么也听不到啊？楼主能说一下问题所在吗？
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