基于ARM UART4：在键盘输入一个字符，字符进行加1，并且回显到串口工具例如：键盘输入一个字符a,串口工具显示b

Aungtoin

于 2023-03-28 22:18:15 发布

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分类专栏： arm 文章标签：单片机 stm32 嵌入式硬件

本文链接：https://blog.youkuaiyun.com/Aungtoin/article/details/129826518

版权

uart.h

#ifndef __UART4_H__
#define __UART4_H__
#include "/home/ubuntu/2022101/ARM/03-uart4-c/common/include/stm32mp1xx_uart.h"
#define RCC_AHB4_ENSETR (*(volatile unsigned int *)0x50000A28)
#define RCC_APB1_ENSETR (*(volatile unsigned int *)0x50000A00)

#define GPIOB_AHB4_MODER (*(volatile unsigned int *)0x50003000)
#define GPIOG_AHB4_MODER (*(volatile unsigned int *)0x50008000)

#define GPIOB_AFRL (*(volatile unsigned int *)0x50003020)
#define GPIOG_AFRH (*(volatile unsigned int *)0x50008024)


//初始化串口函数
void hal_uart4_init();
//发送一个字符
void put_char(const char str);
//接受一个字符
char get_char();



#endif

uart.c

#include "uart4.h"

//初始化串口函数
void hal_uart4_init()
{
	/*******RCC章节初始化******/
	//使能RCC_AHB4_ENSETR   [gpio-b,gpio-g]寄存器
	RCC_AHB4_ENSETR=RCC_AHB4_ENSETR|(0x01<<1);  //gpio-b组
	RCC_AHB4_ENSETR=RCC_AHB4_ENSETR|(0x01<<6);  //gpio-g组
	//使能RCC_APB1_ENSETR   寄