Resolved! The adc use the timer trgo,is wrong.
A bug in cubemx hal lib,a file named "stm32l4xx_hal_adc.h" in the STM32Cube_FW_L4_V1.13.0 ,in code line 518.#define ADC_EXTERNALTRIG_T4_TRGO (LL_ADC_REG_TRIG_EXT_TIM4_CH4) make sure as #define ADC_EXTERNALTRIG_T4_TRGO (LL_ADC_REG_TRIG_EXT_TIM...