中科院许西刚博士编写的USB的ＷＤＭ驱动程序。-Hsu Hsi just CAS prepared by Dr. USB WDM driver.

STM32时钟学习笔记(2010-01-27 09:23:15)转载标签：杂谈 分类：嵌入式 在STM32中，有五个时钟源，为HSI、HSE、LSI、LSE、PLL。 ①、HSI是高速内部时钟 8M，RC振荡器，频率为8MHz。 ②、HSE是高速外部时钟，可接石英/陶瓷谐振器，或者接 外部时钟源，频率范围为4MHz~16MHz。 ③、LSI是低速内部时钟，RC振荡器，频率为40kHz。 ④、LSE是低速外部时钟，接频率为32.768kHz的石英晶体。 ⑤、PLL为锁

This example shows how to use, for debug purpose, the RCC_GetClocksFreq function to retrieve the current status and frequencies of different on chip clocks. You can see the RCC_ClockFreq structure content, which hold the frequencies of diffe

stm32f103的程序例子是RCC配置时钟的简单程序(The STM32F103 program is a simple program for configuring the RCC clock)