LPC213x系列底层硬件驱动函数库，包含：GPIO、UART、I2C、SPI、SSP、PWM、定时计数器、ADC、DA、实时时钟、看门狗、中断控制器、锁相环PLL、IAP等，有使用说明和源码分析。-LPC213x series of underlying hardware driver library, including: GPIO, UART, I2C, SPI, SSP, PWM, timer counter, ADC, DA, real-time clock, watchdog, interrupt controller, phase-locked loop PLL, IAP, etc., have to use descr iption and source code analysis.