单片机一次性扩展5个串口，没有使用限制，最高可达12000速率，够牛的吧？整套源代码，包括main.C以及各个.H头文件，可直接使用甚至无需编译。-Single-chip one-time extension of five serial port, there is no restriction on the use of up to 12,000 rate, enough cattle, right? Package of source code, including the main.c

STM32F100RB microcontroller, 128 KB Flash, 8 KB RAM in 64-pin LQFP On-board ST-Link with selection mode switch to use the kit as a stand-alone ST-Link (with SWD connector) Designed to be powered by USB or an external supply of 5 V or 3.3 V C

MSP430-HG2231 is header board with MSP430G2231IPW14R ultralowpower mixed signal microcontroller from Texas Instruments. MSP430G2231IPW14R has a built-in 16-bit timer, ten I/O pins, a 10-bit A/D converter and built-in communication capability us