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5. Hezhou Air32F103_LCD_key

2022-08-02 03:15:00 【WuZJJJ】

一、简介

本章目的：将LCDThe direction buttons on the expansion board are used,在LCDThe corresponding direction is displayed above.

二、代码

Because this direction key is commonGPIO,没有什么原理,所以直接开撸.

2.1key.c

在read_key函数中,读取按键的GPIO值,赋值给ret对应的bit位上,Then do one and the old value,Returns the new value if the value has changed,否则返回0.

#include "key.h"

void KEY_GPIO_Init(void)
{
    
	GPIO_InitTypeDef GPIO_InitStructure;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE); //使能GPIOA、GPIOB时钟

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_15;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;	 //上拉输入模式
	GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIOA.0,1,15
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;	 //上拉输入模式
	GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化GPIOB.8,9 
}								    

u8 read_key(void)
{
    
	u8 ret=0;
	static u8 ret_last=0;
	if(!KEY_GPIO_UP)ret |= KEY_UP_PRESS;
	if(!KEY_GPIO_DOWN)ret |= KEY_DOWN_PRESS;
	if(!KEY_GPIO_LEFT)ret |= KEY_LEFT_PRESS;
	if(!KEY_GPIO_RIGHT)ret |= KEY_RIGHT_PRESS;
	if(!KEY_GPIO_CENTER)ret |= KEY_CENTER_PRESS;
	if(ret!=ret_last)
	{
    
		ret_last = ret;
		return ret;
	}
	return ret;
}

2.2key.c

#ifndef __KEY_H__
#define __KEY_H__ 
#include "air32f10x.h"
#include "sys.h"

/* A1上 A15下 B8左 A0右 B9中 */
#define KEY_GPIO_UP PAin(1)
#define KEY_GPIO_DOWN PAin(15)
#define KEY_GPIO_LEFT PBin(8)
#define KEY_GPIO_RIGHT PAin(0)
#define KEY_GPIO_CENTER PBin(9)

typedef enum
{
    
	KEY_UP = 0,
	KEY_DOWN,
	KEY_LEFT,
	KEY_RIGHT,
	KEY_CENTER
}key_t;

#define KEY_UP_PRESS (1<<KEY_UP)
#define KEY_DOWN_PRESS (1<<KEY_DOWN)
#define KEY_LEFT_PRESS (1<<KEY_LEFT)
#define KEY_RIGHT_PRESS (1<<KEY_RIGHT)
#define KEY_CENTER_PRESS (1<<KEY_CENTER)

void KEY_GPIO_Init(void);
u8 read_key(void);

#endif

2.3main.c

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "delay.h"
#include "led.h"
#include "key.h"
#include "usart.h"
#include "timer.h"
#include "gui.h"
#include "rcc_clk.h"
#include "picture.h"

u8 key=0,key_last=0xFF,key_first=1;
char str[50];

int main(void)
{
    
	RCC_ClkConfiguration();						//配置时钟
	DELAY_Init();											//延时初始化
	USART1_Init(115200);							//串口1初始化
	LED_GPIO_Init();									//LED初始化
	KEY_GPIO_Init();									//KEY初始化
	ST7735V_Init();										//LCD初始化
	GUI_Clear(White);									//LCD清屏
	
	TIM3_Int_Init(30000-1,72-1);			//定时器3初始化,10ms(216M/30k/72=100k)
	TIM2_Int_Init(30000-1,36000-1);		//定时器2初始化,5000ms(216M/30k/36k=0.2HZ=5000ms)
	USART1_ClearBuffer();							//清空串口1接收buffer
	
	CLK_Printf();											//打印时钟频率
	printf("wuzjjj\r\n");							//打印欢迎语句
	
// GUI_Pic((u16*)gImage_wxhq); //LCD显示图片
	GUI_ShowHzChar(0,0,"Air32F103_LCD测试",Black,White);
	USART1_ClearBuffer();							//清空串口1接收buffer
	while (1)
	{
    
		if(USART1_RX_STA&0x8000)				//收到串口数据
		{
    
			GUI_ShowHzCharAuto(0,16,(char*)USART1_RX_BUF,Black,White);
			
			if(strcmp((char*)USART1_RX_BUF,"LEDR_ON")==0)
				LEDR_ON;
			else if(strcmp((char*)USART1_RX_BUF,"LEDR_OFF")==0)
				LEDR_OFF;
			else if(strcmp((char*)USART1_RX_BUF,"LEDG_ON")==0)
				LEDG_ON;
			else if(strcmp((char*)USART1_RX_BUF,"LEDG_OFF")==0)
				LEDG_OFF;
			else if(strcmp((char*)USART1_RX_BUF,"LEDB_ON")==0)
				LEDB_ON;
			else if(strcmp((char*)USART1_RX_BUF,"LEDB_OFF")==0)
				LEDB_OFF;
			USART1_RX_STA = USART1_RX_STA&0x7FFF;		//去掉标志位,剩下数据长度
			printf("received,%d:",USART1_RX_STA);		//发送辅助信息及收到的数据长度
			printf("%s\r\n",USART1_RX_BUF);					//将收到的数据发回
			USART1_ClearBuffer();										//清空串口1接收buffer
		}
		
		key = read_key();
		if((key!=key_last&&key!=0)||key_first==1)
		{
    
			GUI_Arc(80,30,7,key&KEY_UP_PRESS?Red:Gray,1);
			GUI_Arc(80,70,7,key&KEY_DOWN_PRESS?Red:Gray,1);
			GUI_Arc(60,50,7,key&KEY_LEFT_PRESS?Red:Gray,1);
			GUI_Arc(100,50,7,key&KEY_RIGHT_PRESS?Red:Gray,1);
			GUI_Arc(80,50,7,key&KEY_CENTER_PRESS?Red:Gray,1);
			key_last=key;
			key_first=0;
		}
		sprintf(str,"key=%2d",key);
		GUI_ShowHzChar(0,60,str,Black,White);
		delay_ms(50);
	}
}