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问题： stm32f103的DAC模块，配置完成后用万用表测始终输出0V
描述:
// 1.GPIO配置
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN;//模拟输入
GPIO_Init(GPIOA,&GPIO_InitStruct);
//2.DAC模块配置
void DAC_Configuration(void)
{
DAC_InitTypeDef DAC_InitStructure;
DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software;//软件触发
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
DAC_Init(DAC_Channel_1,&DAC_InitStructure);//初始化
DAC_Cmd(DAC_Channel_1,ENABLE);//开启DAC
}
//3.输出特定的电压函数
void DAC_OutVoltage(float Voltage)
{
u16 data = 0;
data = (u16)(Voltage/3.3)*4095;//数值转换
DAC_SetChannel1Data(DAC_Align_12b_R,data);//将数据送入DAC
DAC_SoftwareTriggerCmd(DAC_Channel_1,ENABLE);//软件开启转换
}
希望大家帮忙看一下，实在找不出哪点有问题了
描述:
stm32 ，DAC
这是DAC的配置函数// 1.GPIO配置
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN;//模拟输入
GPIO_Init(GPIOA,&GPIO_InitStruct);
//2.DAC模块配置
void DAC_Configuration(void)
{
DAC_InitTypeDef DAC_InitStructure;
DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software;//软件触发
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
DAC_Init(DAC_Channel_1,&DAC_InitStructure);//初始化
DAC_Cmd(DAC_Channel_1,ENABLE);//开启DAC
}
//3.输出特定的电压函数
void DAC_OutVoltage(float Voltage)
{
u16 data = 0;
data = (u16)(Voltage/3.3)*4095;//数值转换
DAC_SetChannel1Data(DAC_Align_12b_R,data);//将数据送入DAC
DAC_SoftwareTriggerCmd(DAC_Channel_1,ENABLE);//软件开启转换
}
希望大家帮忙看一下，实在找不出哪点有问题了