LPC1768-Xplorer is a CORTEX-M3 based stamp board for NGX’s mbed-Xpresso Baseboard. The LPC1768 microcontroller has 512KB of internal flash and 64KB RAM. Ethernet MAC, USB Device/Host/OTG interface, 8-channel general purpose DMA controller, 4 UARTs, 2

利用stm32的通用定时器来输出PWM脉冲宽度调制。使用cortex-M3提供的库函数编写。 -The use of general-purpose timer stm32 to output PWM pulse width modulation. Use library functions cortex-M3 provides written.