主控cpu采用stm32f407vet6,采用口线模拟的spi总线来采集ads1118的俩路输入模拟信号。信号输入范围为0--2.048V。对应0--65535.(The main control cpu adopts stm32f407vet6, and adopts the spi bus of port line simulation to collect the two input analog signals of ads1118. The signal input range is