STM32学习笔记(国外英文资料).docVIP

STM32学习笔记(国外英文资料) English word Remap: heavy mapping Partialremap: partial remapping Pend: hang The establishment of the project template can be to use a standard template, only it is ok to change the Main function, do not need to add a header file path, the statements set the debug macro to define variables, parameters, etc. The generic templates contain USER, CORE, FWLIB, OBJ, and HARDWARE five folders. Put the main function c file in USER. In CORE, start c and s files. FWLIB places the firmware library C file. OBJ places the compiled clutter of generated files. HARDWARE places the c file for the HARDWARE associated functions that you write. The assignment operation: With one or an operation, you can set the one to zero, and you can keep the other unmanipulated bits unchanged. Such as: GPROA_ BSRR | = 0X01 / / does not change the value of the first 7 bits, the zero position is 1 GPROA_ BSRR = ~ 0X01 / / also does not change the previous seven bits, the zeroth position is 0 Timx- SR = (uint16_t) ~ TIM_FLAG; / / its also a zero operation Tips for writing: GPIOx - BSRR = ((uint32_t) 0x01) This is to set the BSRR registers pinpos bit to 1, so why do you want to set a fixed value by moving from the left instead of directly? In fact, this is intended to improve the readability and reusability of the code. This line of code is straightforward to know that the pinpos bit is set to 1. If you write GPIOx - BSRR = 0 x0030; This code is not good and it is bad for reuse. Theres a lot of code like this: Gpia- ODR | = 1 5; / / PA. 5 output is high, not changing other bits So lets see, 5 tells us that its the fifth and the sixth port, and 1 tells us that its set to 1. Format: # define identifier string The identifier is the defined macro name. A string can be a constant, an expression, a format string, etc. Such as: # define SYSCLK_FREQ_72MHzThe value of the definition identifier SYSCLK_FREQ_72MHz is Single-chip microcomputer application development proce