The circuit is shown in the figure. Through debugging, it is found that the circuit can neither receive nor send data. However, after short-circuiting GND and GND1, it can send and receive normally. W
There are many kinds of serial port screens on the market now, and the main control chips have been polished. I would like to ask which microcontroller is suitable as the main control of the serial po
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GPIO; see MCU Principle Interface: Hardware Diagram on page 243 by Hu Hancai
The 4 I/O ports of MCS-51 have three operation modes: output data mode, read port data mode,
Read port pin data mode.
In th