stm32g030f使用TIM1_PWM_DMA丢信号,频率降了一半有遇到过的吗?

zhcj66

如题<stm32g030f使用TIM1_PWM_DMA丢信号,频率降了一半有遇到过的吗?>

使用定时器直接产生固定脉宽的pwm信号正常,100hz,

但是使用DMA时,发送了10组pwm数据,竟然出现了5个波形,频率也减了一半,成了50hz

请问坛友有遇到过的吗?

1. static void MX_TIM1_Init(void)
   
2. {
   
3. 
   
4.   /* USER CODE BEGIN TIM1_Init 0 */
   
5. 
   
6.   /* USER CODE END TIM1_Init 0 */
   
7. 
   
8.   TIM_MasterConfigTypeDef sMasterConfig = {0};
   
9.   TIM_OC_InitTypeDef sConfigOC = {0};
   
10.   TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
    
11. 
    
12.   /* USER CODE BEGIN TIM1_Init 1 */
    
13. 
    
14.   /* USER CODE END TIM1_Init 1 */
    
15.   htim1.Instance = TIM1;
    
16.   htim1.Init.Prescaler = 4800;//48000;//0;
    
17.   htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
    
18.   htim1.Init.Period = 100-1;//59;
    
19.   htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    
20.   htim1.Init.RepetitionCounter = 0;
    
21.   htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    
22.   if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
    
23.   {
    
24.     Error_Handler();
    
25.   }
    
26.   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    
27.   sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
    
28.   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    
29.   if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
    
30.   {
    
31.     Error_Handler();
    
32.   }
    
33.   sConfigOC.OCMode = TIM_OCMODE_PWM1;
    
34.   sConfigOC.Pulse = 50;//占空比
    
35.   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    
36.   sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
    
37.   sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
    
38.   sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
    
39.   sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
    
40.   if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    
41.   {
    
42.     Error_Handler();
    
43.   }
    
44.   sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
    
45.   sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
    
46.   sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
    
47.   sBreakDeadTimeConfig.DeadTime = 0;
    
48.   sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
    
49.   sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
    
50.   sBreakDeadTimeConfig.BreakFilter = 0;
    
51.   sBreakDeadTimeConfig.BreakAFMode = TIM_BREAK_AFMODE_INPUT;
    
52.   sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
    
53.   sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
    
54.   sBreakDeadTimeConfig.Break2Filter = 0;
    
55.   sBreakDeadTimeConfig.Break2AFMode = TIM_BREAK_AFMODE_INPUT;
    
56.   sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
    
57.   if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
    
58.   {
    
59.     Error_Handler();
    
60.   }
    
61.   /* USER CODE BEGIN TIM1_Init 2 */
    
62. 
    
63.   /* USER CODE END TIM1_Init 2 */
    
64.   HAL_TIM_MspPostInit(&htim1);
    
65. 
    
66. }
    
67. 
    
68. 
    
69. static void MX_DMA_Init(void)
    
70. {
    
71. 
    
72.   /* DMA controller clock enable */
    
73.   __HAL_RCC_DMA1_CLK_ENABLE();
    
74. 
    
75.   /* DMA interrupt init */
    
76.   /* DMA1_Channel1_IRQn interrupt configuration */
    
77.   HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
    
78.   HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
    
79.   /* DMA1_Channel2_3_IRQn interrupt configuration */
    
80.   HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
    
81.   HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
    
82. 
    
83. }
    
84. 
    
85. 
    
86. void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* htim_pwm)
    
87. {
    
88.   if(htim_pwm->Instance==TIM1)
    
89.   {
    
90.   /* USER CODE BEGIN TIM1_MspInit 0 */
    
91. //GPIO_InitTypeDef GPIO_InitStruct = {0};
    
92.   /* USER CODE END TIM1_MspInit 0 */
    
93.     /* Peripheral clock enable */
    
94.     __HAL_RCC_TIM1_CLK_ENABLE();
    
95. 
    
96.     /* TIM1 DMA Init */
    
97.     /* TIM1_CH1 Init */
    
98.     hdma_tim1_ch1.Instance = DMA1_Channel2;
    
99.     hdma_tim1_ch1.Init.Request = DMA_REQUEST_TIM1_CH1;                                       
    
100.     hdma_tim1_ch1.Init.Direction = DMA_MEMORY_TO_PERIPH;                               
     
101.     hdma_tim1_ch1.Init.PeriphInc = DMA_PINC_DISABLE;                                       
     
102.     hdma_tim1_ch1.Init.MemInc = DMA_MINC_ENABLE;                                               
     
103.     hdma_tim1_ch1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;       
     
104.     hdma_tim1_ch1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;               
     
105.     hdma_tim1_ch1.Init.Mode = DMA_NORMAL;                                                               
     
106.     hdma_tim1_ch1.Init.Priority = DMA_PRIORITY_HIGH;                                       
     
107.     if (HAL_DMA_Init(&hdma_tim1_ch1) != HAL_OK)
     
108.     {
     
109.       Error_Handler();
     
110.     }
     
111.        
     
112.     __HAL_LINKDMA(htim_pwm,hdma[TIM_DMA_ID_CC1],hdma_tim1_ch1);
     
113. 
     
114.   /* USER CODE BEGIN TIM1_MspInit 1 */
     
115. 
     
116.   /* USER CODE END TIM1_MspInit 1 */
     
117.   }
     
118. 
     
119. }
     
120. 
     
121. 
     
122. unsigned int timeDmaBuf[50];
     
123. 
     
124. void pwm_dma_test(void){
     
125. unsigned char i;
     
126.                 TIM_PWM_DMA_SW = 0;
     
127.                 for(i=0;i<10;i++){
     
128.                         timeDmaBuf[i] = i*10+10;
     
129.                 }
     
130.                 HAL_TIM_PWM_Start_DMA(&htim1,TIM_CHANNEL_1,(uint32_t*)timeDmaBuf,10);
     
131. }
     
132. 
     
133. 
     
134. int main(void)
     
135. {
     
136.   /* USER CODE BEGIN 1 */
     
137. 
     
138.   /* USER CODE END 1 */
     
139. 
     
140.   /* MCU Configuration--------------------------------------------------------*/
     
141. 
     
142.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
     
143.   HAL_Init();
     
144. 
     
145.   /* USER CODE BEGIN Init */
     
146. 
     
147.   /* USER CODE END Init */
     
148. 
     
149.   /* Configure the system clock */
     
150.   SystemClock_Config();
     
151. 
     
152.   /* USER CODE BEGIN SysInit */
     
153. 
     
154.   /* USER CODE END SysInit */
     
155. 
     
156.   /* Initialize all configured peripherals */
     
157.   MX_GPIO_Init();
     
158.   MX_DMA_Init();
     
159.   MX_SPI1_Init();
     
160.   MX_TIM14_Init();
     
161.   MX_TIM1_Init();
     
162.   /* USER CODE BEGIN 2 */
     
163. 
     
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.           pwm_dma_test();
     
174.           HAL_Delay(200);
     
175.   }
     
176.   /* USER CODE END 3 */
     
177. }

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zhcj66

这个问题大家都没有遇到过,或者做过的,发一下代码我对比一下

zhcj66

问题找到了,DMA是用的DMA_PDATAALIGN_HALFWORD  16位

unsigned int timeDmaBuf[50];   这里int 是32位;

修改timeDmaBuf的类型 把int改成short 波形搞定了