STM32定时器的应用，产生1ms的中断和10us的延迟，希望对大家有用-STM32 timer application, generate 1ms interrupt and 10us delay, and hope to be useful

stm32芯片定时器的中断的实现，对32定时器的初始化和GPIO口的操控(STM32 chip timer interrupt the realization of the 32 timer initialization and GPIO port control)