** @addtogroup M051_ADC_EXPORTED_FUNCTIONS ADC Exported Functions
@{
*/
/**
* @brief Configure the analog input source of channel 7.
* @param[in] adc Base address of ADC module.
* @param[in] u32Source Decides the analog input source of channel 7. Valid values are:
* - \ref ADC_ADCHER_PRESEL_EXT_INPUT_SIGNAL : External analog input.
* - \ref ADC_ADCHER_PRESEL_INT_BANDGAP : Internal bandgap voltage.
* - \ref ADC_ADCHER_PRESEL_INT_TEMPERATURE_SENSOR : Output of internal temperature sensor.
* @return None
* @NOTE While using VBG as channel 7 source, ADC module clock must /b not exceed 300kHz.
*/
#define ADC_CONFIG_CH7(adc, u32Source) (ADC->ADCHER = (ADC->ADCHER & ~ADC_ADCHER_PRESEL_Msk) | (u32Source))
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楼主请看，ADC_ADCHER_PRESEL_INT_TEMPERATURE_SENSOR ，使用这个参数就是测内部温度。
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楼主
