stm32_ADC+DMA+TIM1+DMAUSART -stm32 adc dma timer dma usart

基于STM32单片机的TIM2定时器触发AD转换，控制AD的转换速率，弥补DMA传输速度过快导致数据处理混乱的问题。-Trigger AD conversion is based STM32 microcontroller TIM2 timer controls the AD conversion rate to make up for excessive speed DMA transfer of data processing leads to confusion problems.