最近要用到多个混频信号，想用dma更新pwm占空比的方法来做，可是出来的波形一直不多，哪位大神指导下，感激不尽！！！！
下面贴上部分关键代码：

先是定时器有关的代码
#include "tim.h"

/* USER CODE BEGIN 0 */
extern uint8_t sinewave[256];
/* USER CODE END 0 */

TIM_HandleTypeDef htim3;
DMA_HandleTypeDef hdma_tim3_ch1_trig;

/* TIM3 init function */
void MX_TIM3_Init(void)
{
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 0;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 256-1;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_PWM_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = sinewave[0];
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  HAL_TIM_MspPostInit(&htim3);

}

void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* tim_pwmHandle)
{

  if(tim_pwmHandle->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM3_MspInit 0 */

  /* USER CODE END TIM3_MspInit 0 */
    /* TIM3 clock enable */
    __HAL_RCC_TIM3_CLK_ENABLE();

    /* TIM3 DMA Init */
    /* TIM3_CH1_TRIG Init */
    hdma_tim3_ch1_trig.Instance = DMA1_Stream4;
    hdma_tim3_ch1_trig.Init.Channel = DMA_CHANNEL_5;
    hdma_tim3_ch1_trig.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_tim3_ch1_trig.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_tim3_ch1_trig.Init.MemInc = DMA_MINC_ENABLE;
    hdma_tim3_ch1_trig.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
    hdma_tim3_ch1_trig.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
    hdma_tim3_ch1_trig.Init.Mode = DMA_CIRCULAR;
    hdma_tim3_ch1_trig.Init.Priority = DMA_PRIORITY_HIGH;
    hdma_tim3_ch1_trig.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_tim3_ch1_trig) != HAL_OK)
    {
      Error_Handler();
    }

    /* Several peripheral DMA handle pointers point to the same DMA handle.
     Be aware that there is only one stream to perform all the requested DMAs. */
    __HAL_LINKDMA(tim_pwmHandle,hdma[TIM_DMA_ID_CC1],hdma_tim3_ch1_trig);
    __HAL_LINKDMA(tim_pwmHandle,hdma[TIM_DMA_ID_TRIGGER],hdma_tim3_ch1_trig);

  /* USER CODE BEGIN TIM3_MspInit 1 */

  /* USER CODE END TIM3_MspInit 1 */
  }
}
void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(timHandle->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM3_MspPostInit 0 */

  /* USER CODE END TIM3_MspPostInit 0 */

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**TIM3 GPIO Configuration   
    PA6     ------> TIM3_CH1
    */
    GPIO_InitStruct.Pin = GPIO_PIN_6;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* USER CODE BEGIN TIM3_MspPostInit 1 */

  /* USER CODE END TIM3_MspPostInit 1 */
  }

}

void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* tim_pwmHandle)
{

  if(tim_pwmHandle->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM3_MspDeInit 0 */

  /* USER CODE END TIM3_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_TIM3_CLK_DISABLE();

    /* TIM3 DMA DeInit */
    HAL_DMA_DeInit(tim_pwmHandle->hdma[TIM_DMA_ID_CC1]);
    HAL_DMA_DeInit(tim_pwmHandle->hdma[TIM_DMA_ID_TRIGGER]);
  /* USER CODE BEGIN TIM3_MspDeInit 1 */

  /* USER CODE END TIM3_MspDeInit 1 */
  }
}


然后是主函数
#include "main.h"
#include "dma.h"
#include "tim.h"
#include "gpio.h"

uint8_t sinewave[256]={128,131,134,137,140,143,146,149,152,155,158,161,164,
                167,170,172,175,178,181,183,186,189,191,194,196,199,201,204,206,208,
                211,213,215,217,219,221,223,225,226,228,230,231,233,234,236,237,238,
                240,241,242,243,244,245,245,246,247,247,248,248,248,249,249,249,249,
                249,249,249,248,248,248,247,247,246,245,245,244,243,242,241,240,238,
                237,236,234,233,231,230,228,226,225,223,221,219,217,215,213,211,208,
                206,204,201,199,196,194,191,189,186,183,181,178,175,172,170,167,164,
                161,158,155,152,149,146,143,140,137,134,131,128,125,122,119,116,113,
                110,107,104,101,98,95,92,89,86,83,80,78,75,72,69,67,64,61,59,56,54,
                51,49,46,44,42,39,37,35,33,31,29,27,25,24,22,20,19,17,16,14,13,12,
                10,9,8,7,6,5,5,4,3,3,2,2,2,1,1,1,1,1,1,1,2,2,2,3,3,4,5,5,6,7,8,9,
                10,12,13,14,16,17,19,20,22,24,25,27,29,31,33,35,37,39,42,44,46,49,
                51,54,56,59,61,64,67,69,72,75,78,80,83,86,89,92,95,98,101,104,107,
                110,113,116,119,122,125};
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);

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();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_TIM3_Init();
  /* USER CODE BEGIN 2 */
  //HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
  HAL_TIM_PWM_Start_DMA(&htim3, TIM_CHANNEL_1, (uint32_t *)sinewave, 256);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /**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 = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != 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_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#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,
     tex: printf("Wrong parameters value: file %s on line %d ", file, line) */
  /* USER CODE END 6 */
}
#endif