1. The usage of hardware IIC is more complicated, and the process of analog IIC is clearer.
2. Hardware IIC is faster than analog and can use DMA
3. Analog IIC can be on any pin, while hardware can only be on fixed pins.
4. Software i2c is a programmer using a program to control the SCL and SDA lines to output high and low levels, simulating the timing of the i2c protocol. Generally, it is more stable than hardware i2c, but the program is more complicated, but not difficult.
5. Hardware i2c programmers only need to call the i2c control function, without directly controlling the high and low level output of SCL and SDA. However, the hardware i2c of some microcontrollers is not very stable and there are many debugging problems.
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