There is a piece of code for a serial port monitoring filter driver as follows: RtlInitUnicodeString(&usDeviceToFilter, L"\\??\\COM1"); NtStatus = IoGetDeviceObjectPointer( IN &usDeviceToFilter, IN FI
There is not much information about stm_RF522 on the Internet, but there are some. However, most of the information has more complex functions, using LCD and so on. This is good, but it is undoubtedly
A 4MHz signal is passed through an 8MHz frequency divider to obtain a signal with a period of 2s, and then a latch signal is added to pass this signal through a counter, decoder, and digital tube. How