AD转换，双通道stm32，采用DMA方式传输-ADC transfer

ADC双通道，可以实现ADC双通道采样，自己试验没有很大的问题(ADC double channel, you can achieve ADC double channel sampling, their own test, there is no big problem)

在msp430f169上实现双通道dac和单通道dac，并且能用键盘控制dac的输出值，在12864上显示(Double channel DAC and single channel DAC are implemented on msp430f169, and the output value of DAC can be controlled by keyboard. It is displayed on 12864)

利用DMA实现ARM单片机双通道的AD采样(Double channel AD sampling of ARM single chip microcomputer realized by DMA)