Method of transmitting floating point data using serial port of single chip microcomputer-EEWORLD

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We all know that the unit of transmission of the microcontroller serial port is byte, and the floating point number occupies four bytes. The simple idea is to use a char pointer to point to the floating point data, and use the pointer addressing to split the floating point number into four char data. The receiving end receives four char numbers. In order to restore them to float data, using a union is a good way. The test code is as follows:

The program running results are as follows:

Note: If you use signed character data in the structure, there will be some problems when printing with printf. You can try it.

Of course, there is also the big-endian and small-endian problem that is often mentioned in embedded systems. I believe everyone understands what is going on.

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