VC编程的AVR定时器初值计算，输入预分频的时钟频率即可计算出定时器初值。用于弥补codevisionAVR软件不能帮助计算初值。-VC programming AVR timer initial calculations, input clock frequency prescaler timer initial value can be calculated. Software can not be used to make up codevisionAVR help calculate t