Question

#define LCD_RS_H GPIOA->BSRR = 1Ul<<9 这段代码是什么意思？

从一段单片机的c语言程序截的。有图。#define LCD_D0_H GPIOA->BSRR = 1Ul<<12 // PA12#define LCD_D0_L GPIOA->BRR = 1Ul<<12#define LCD_D1_H GPIOA->BSRR = 1Ul<<6 // PA6#define LCD_D1_L GPIOA->BRR = 1Ul<<6#define LCD_D2_H GPIOA->BSRR = 1Ul<<5 // PA5#define LCD_D2_L GPIOA->BRR = 1Ul<<5#define LCD_D3_H GPIOA->BSRR = 1Ul<<4 // PA4#define LCD_D3_L GPIOA->BRR = 1Ul<<4#define LCD_D4_H GPIOB->BSRR = 1Ul<<5 // PB5#define LCD_D4_L GPIOB->BRR = 1Ul<<5#define LCD_D5_H GPIOB->BSRR = 1Ul<<6 // PB6#define LCD_D5_L GPIOB->BRR = 1Ul<<6#define LCD_D6_H GPIOB->BSRR = 1Ul<<7 // PB7#define LCD_D6_L GPIOB->BRR = 1Ul<<7#define LCD_D7_H GPIOB->BSRR = 1Ul<<8 // PB8#define LCD_D7_L GPIOB->BRR = 1Ul<<8

Answer 1

define宏就是替换，，，，，将宏定义的名称，替换成后面的字符或值

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