如下是DAC_InitTypeDef结构体成员简述: (a)DAC_Trigger 该成员用于DAC的触发模式配置,由上文DAC通道框图可知,共有三种触发模式,分别是定时器触发(DAC_Trigger_T2/4/5/6/7/8_TRGO)、软件触发(DAC_Trigger_Software)和EXTI_9触发方式(DAC_Trigger_Ext_IT9)。 (b)DAC_WaveGeneration 该成员可配置输出伪噪声和三...
上面代码中,DAC的通道1与通道2的DAC_Trigger分别设置成 定时器2触发DAC_Trigger_T2_TRGO与定时器6触发DAC_Trigger_T6_TRGO。关于DAC的外部触发源,只能是下面的几个:TIM2、TIM4、TIM5、TIM6、TIM7、TIM8、EXIT_Line9、SWTRIG(软件触发),如下图所示: DAC通道1与通道2配置完后,还要打开DAC的DMA功能:DAC_DMA...
#define DAC_Trigger_T2_TRGO ((uint32_t)0x00000024) /*!< TIM2 TRGO selected as external conversion trigger for DAC channel */ #define DAC_Trigger_T4_TRGO ((uint32_t)0x0000002C) /*!< TIM4 TRGO selected as external conversion trigger for DAC channel */ #define DAC_Trigger_T5_TRGO ((...
❶DAC_Trigger:指定所选DAC的触发源,有9个触发源可以选择: DAC_Trigger_None DAC_Trigger_T6_TRGO DAC_Trigger_T8_TRGO DAC_Trigger_T7_TRGO DAC_Trigger_T5_TRGO DAC_Trigger_T2_TRGO DAC_Trigger_T4_TRGO DAC_Trigger_Ext_IT9 DAC_Trigger_Software ❷DAC_WaveGeneration :指定DAC是否噪声波形,三角波或...
DAC_InitStructure.DAC_Trigger=DAC_Trigger_T2_TRGO;//使用TIM2作为触发源 DAC_InitStructure.DAC_Wave...
DAC_Trigger:触发方式 DAC_WaveGeneration:是否生成波。stm32的DAC可以生成噪声和三角形波两种波 DAC_LFSRUnmask_TriangleAmplitude:生成波的幅值 DAC_OutputBuffer:输出缓冲。手册解释 /*DAC_InitStruct 参数初始化*/ DAC_InitTypeDef DAC_InitStruct; DAC_InitStruct.DAC_Trigger = DAC_Trigger_T2_TRGO; //触发方式...
因此,由于DAC是接受到定时器2(不是上一方案的定时器3,原因之后会讲)的触发输出后才会更新,所以Trigger被设为了T2_TRGO(后面配置定时器的时候也会进行相应的配置),而DMA请求是由DAC产生的,并且此时直接设置DAC寄存器的值并不会改变DAC输出,所以最后用DAC_DMACmd()替换了DAC_SetChannel1Data()。
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;//使用TIM2作为触发源 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;//不使用波形发生器 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;//不使用DAC输出缓冲
}/** DAC channel OUT1 config*/sConfig.DAC_Trigger=DAC_TRIGGER_T2_TRGO; sConfig.DAC_OutputBuffer=DAC_OUTPUTBUFFER_DISABLE;/* 补充:这里必须关闭 */if(HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) !=HAL_OK) { Error_Handler(); ...
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; //选择定时器2作外部触发源 DAC_InitStructu...