请问ucosiii的时间戳那部分代码涉及到的DWG寄存器,哪里有具体描述啊。简单看了一下参考手册,文档里大概说移植ucosiii使用的寄存器是21位的,那么在计数器溢出时怎么办呢?
38.14.2 Time stamp packets, synchronization and overflow packets
Time stamp packets encode time stamp information, generic control and synchronization. It uses a 21-bit timestamp counter (with possible prescalers) which is reset at each time
stamp packet emission. This counter can be either clocked by the CPU clock or the SWV clock.