stm32g030f使用TIM1_PWM_DMA丢信号,频率降了一半有遇到过的吗?
本帖最后由 zhcj66 于 2022-10-28 21:41 编辑如题<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?
static void MX_TIM1_Init(void)
{
/* USER CODE BEGIN TIM1_Init 0 */
/* USER CODE END TIM1_Init 0 */
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
/* USER CODE BEGIN TIM1_Init 1 */
/* USER CODE END TIM1_Init 1 */
htim1.Instance = TIM1;
htim1.Init.Prescaler = 4800;//48000;//0;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 100-1;//59;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 50;//占空比
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
sBreakDeadTimeConfig.DeadTime = 0;
sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakDeadTimeConfig.BreakFilter = 0;
sBreakDeadTimeConfig.BreakAFMode = TIM_BREAK_AFMODE_INPUT;
sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
sBreakDeadTimeConfig.Break2Filter = 0;
sBreakDeadTimeConfig.Break2AFMode = TIM_BREAK_AFMODE_INPUT;
sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM1_Init 2 */
/* USER CODE END TIM1_Init 2 */
HAL_TIM_MspPostInit(&htim1);
}
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
/* DMA1_Channel2_3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
}
void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* htim_pwm)
{
if(htim_pwm->Instance==TIM1)
{
/* USER CODE BEGIN TIM1_MspInit 0 */
//GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE END TIM1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_TIM1_CLK_ENABLE();
/* TIM1 DMA Init */
/* TIM1_CH1 Init */
hdma_tim1_ch1.Instance = DMA1_Channel2;
hdma_tim1_ch1.Init.Request = DMA_REQUEST_TIM1_CH1;
hdma_tim1_ch1.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_tim1_ch1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_tim1_ch1.Init.MemInc = DMA_MINC_ENABLE;
hdma_tim1_ch1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_tim1_ch1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_tim1_ch1.Init.Mode = DMA_NORMAL;
hdma_tim1_ch1.Init.Priority = DMA_PRIORITY_HIGH;
if (HAL_DMA_Init(&hdma_tim1_ch1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(htim_pwm,hdma,hdma_tim1_ch1);
/* USER CODE BEGIN TIM1_MspInit 1 */
/* USER CODE END TIM1_MspInit 1 */
}
}
unsigned int timeDmaBuf;
void pwm_dma_test(void){
unsigned char i;
TIM_PWM_DMA_SW = 0;
for(i=0;i<10;i++){
timeDmaBuf = i*10+10;
}
HAL_TIM_PWM_Start_DMA(&htim1,TIM_CHANNEL_1,(uint32_t*)timeDmaBuf,10);
}
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_SPI1_Init();
MX_TIM14_Init();
MX_TIM1_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
pwm_dma_test();
HAL_Delay(200);
}
/* USER CODE END 3 */
} 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 问题找到了,DMA是用的DMA_PDATAALIGN_HALFWORD16位
unsigned int timeDmaBuf; 这里int 是32位;
修改timeDmaBuf的类型 把int改成short 波形搞定了
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