Design of ECG acquisition, analysis and processing system based on STM32 microprocessor

The main control chip stm32f103vc is a Cortex-M3 core processor with low cost and low power consumption as the control core. 32-bit Cortex ®- M3 CPU。 72 MHz maximum frequency, 1.25 DMIPS/MHz。 USB, CAN, 11 timers, 3 ADCs, 13 communication interfaces。

SD card storage, serial port communication, LCD interface

Negative voltage is generated by voltage converter icl7660s

ADC chip adopts ADS7843 chip as control chip, four channel multiplexer

General SPI mode access mode

Asynchronous receiving / transmitting device UART

RS-232 communication, MAX3232 interface chip completes level conversion and communication

Key with touch function