STM32F103 beginner's opinion

1. Preemption priority and response priority are actually two priorities contained in an interrupt. The former is a level division of preemption priority, and the latter is a priority division of the same preemption priority.

For example: if the preemption priority of interrupt A is higher than that of B, then the interrupt of A can be triggered in B, ignoring the response priority; if the preemption priorities of A and B are the same, then the response priorities of A and B determine which one responds first.

2. I still don't quite understand the difference between the MCU port and the serial port. The serial port is a physical interface, and the port is a logical window, just like a hard drive, it does have 160G, this is a physical concept;

You divide it into areas ABCD, each with 40G. This is the logical concept.

3. I don’t have a good grasp of the basics of C under MDK. I don’t understand structures and structure pointers, typedef types, volatile and const type modifiers, and I don’t understand u8, u16, u32, vu32, etc.

In short, there is still a long way to go in learning stm32. I have almost forgotten the C and 51 I learned before. I feel that learning 32 is a bit confusing. Well, never mind. I won’t do anything else during the winter vacation. I will devote my youth to it. I hope I can learn something. . .

typedef

Type Aliases

typedef

Type Aliases

typedef

Type Aliases

typedef

Type Aliases