新人求教关于F103 和F407的ADC代码

laokin · 发表于 2018-3-5 16:52:03

ADC_ExternalTrigConvCmd(ADC1,ENABLE);//采用外部触发
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);//ADC转换时间21us
ADC_Cmd(ADC1, ENABLE);

ADC_ResetCalibration(ADC1); //复位校准
while(ADC_GetResetCalibrationStatus(ADC1)); //等待校准结束，校准结束状态为RESET
ADC_StartCalibration(ADC1); //AD校准
while(ADC_GetCalibrationStatus(ADC1)); //等待校准结束
上面是在F103的ADC配置部分代码

像转换时间在F407怎么就找不到对应的时间
还有采用外部出发也不是这条语句ADC_ExternalTrigConvCmd（）；

正点原子 · 发表于 2018-3-5 16:52:04

407也有啊，也有采样周期的设置，采样周期和转换周期+时钟就可以计算出转换时间。

laokin · 发表于 2018-3-5 16:52:39

新手不大懂求大神指点

laokin · 发表于 2018-3-5 16:53:32

#define ADC_SampleTime_1Cycles5 ((uint8_t)0x00) #define ADC_SampleTime_7Cycles5 ((uint8_t)0x01) #define ADC_SampleTime_13Cycles5 ((uint8_t)0x02) #define ADC_SampleTime_28Cycles5 ((uint8_t)0x03) #define ADC_SampleTime_41Cycles5 ((uint8_t)0x04) #define ADC_SampleTime_55Cycles5 ((uint8_t)0x05) #define ADC_SampleTime_71Cycles5 ((uint8_t)0x06) #define ADC_SampleTime_239Cycles5 ((uint8_t)0x07) #define IS_ADC_SAMPLE_TIME(TIME) (((TIME) == ADC_SampleTime_1Cycles5) || \ ((TIME) == ADC_SampleTime_7Cycles5) || \ ((TIME) == ADC_SampleTime_13Cycles5) || \ ((TIME) == ADC_SampleTime_28Cycles5) || \ ((TIME) == ADC_SampleTime_41Cycles5) || \ ((TIME) == ADC_SampleTime_55Cycles5) || \ ((TIME) == ADC_SampleTime_71Cycles5) || \ ((TIME) == ADC_SampleTime_239Cycles5))