在STM32里面有备份寄存器(BKP),它的功能之一就是用来存储RTC校验值的校验寄存器,即具有RTC校准功能。在PC13引脚上输出RTC校准时钟,RTC闹钟或者秒脉冲。在程序中有#define RTCClockOutput_Enable /*RTC Clock/64 is output on tamper pin(PC.13)*/BKP可以用来存储84个字节...
BLE协议栈里有已经封装好的RTC时钟,时钟源可以是外部晶体振荡时钟也可以是内部RC时钟。The32-kHzXOSC is designed to operate at32.768kHzand provide a stable clock signal for systems requiring time accuracy.The 32-kHz RCOS runs at32.753kHzwhen...