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上一步点亮屏幕之后, 现在还不能触摸, 于是这篇讲下如何添加触摸

0 如何添加触摸代码

只需要在stm32Ouchcontroller.cpp中添加如何获取点就可以了

注意这个是c++写的, 传统的驱动是C写的,不能直接调用

要extern "C"来调用

1 正点原子驱动代码

正点原子代码有点乱, 我重写了下驱动

软件IIC, 通过宏定义方便移植, 同时把delay_us函数写到main.c中实现, 因为带操作系统和不带操作系统的delay_us实现方式不一样

并且如果时钟频率不一样那么就不能直接用

1 IIC软件驱动

#include "siic.h"#define SIIC_SDA_PORT      GPIOI#define SIIC_SDA_PIN  	GPIO_PIN_3#define SIIC_SDA_PORT_LCK __HAL_RCC_GPIOI_CLK_ENABLE();   //使能GPIOH时钟#define SIIC_SCL_PORT      GPIOH#define SIIC_SCL_PIN  	GPIO_PIN_6#define SIIC_SCL_PORT_LCK __HAL_RCC_GPIOH_CLK_ENABLE();   //使能GPIOH时钟#define SIIC_SDA_H  HAL_GPIO_WritePin(SIIC_SDA_PORT,SIIC_SDA_PIN,GPIO_PIN_SET)#define SIIC_SDA_L  HAL_GPIO_WritePin(SIIC_SDA_PORT,SIIC_SDA_PIN,GPIO_PIN_RESET)#define SIIC_SCL_H  HAL_GPIO_WritePin(SIIC_SCL_PORT,SIIC_SCL_PIN,GPIO_PIN_SET)#define SIIC_SCL_L  HAL_GPIO_WritePin(SIIC_SCL_PORT,SIIC_SCL_PIN,GPIO_PIN_RESET)#define SIIC_SPEED_DELAY()       delay_us(2)#define SIIC_SPEED_START_DELAY()  delay_us(30)void SIIC_SDA_OUT(){		GPIO_InitTypeDef GPIO_Initure;    //SDA    GPIO_Initure.Pin=SIIC_SDA_PIN;    GPIO_Initure.Mode=GPIO_MODE_OUTPUT_PP;  //推挽输出    GPIO_Initure.Pull=GPIO_PULLUP;          //上拉    GPIO_Initure.Speed=GPIO_SPEED_HIGH;     //高速    HAL_GPIO_Init(SIIC_SDA_PORT,&GPIO_Initure);     //初始化}void SIIC_SIIC_SDA_IN(){		GPIO_InitTypeDef GPIO_Initure;    //SDA    GPIO_Initure.Pin=SIIC_SDA_PIN;    GPIO_Initure.Mode=GPIO_MODE_INPUT;  //推挽输出    GPIO_Initure.Pull=GPIO_PULLUP;          //上拉    GPIO_Initure.Speed=GPIO_SPEED_HIGH;     //高速    HAL_GPIO_Init(SIIC_SDA_PORT,&GPIO_Initure);     //初始化}uint8_t SIIC_SIIC_SDA_Read(void){	    return HAL_GPIO_ReadPin(SIIC_SDA_PORT,SIIC_SDA_PIN);}void SIIC_SIIC_SDA_Write(uint8_t state){    HAL_GPIO_WritePin(SIIC_SDA_PORT,SIIC_SDA_PIN,state);}//SIIC初始化void SIIC_Init(void){		GPIO_InitTypeDef GPIO_Initure;    SIIC_SDA_PORT_LCK;    SIIC_SCL_PORT_LCK;    // SCL    GPIO_Initure.Pin=SIIC_SCL_PIN;    GPIO_Initure.Mode=GPIO_MODE_OUTPUT_PP;  //推挽输出    GPIO_Initure.Pull=GPIO_PULLUP;          //上拉    GPIO_Initure.Speed=GPIO_SPEED_HIGH;     //高速    HAL_GPIO_Init(SIIC_SCL_PORT,&GPIO_Initure);     //初始化    //SDA    GPIO_Initure.Pin=SIIC_SDA_PIN;    HAL_GPIO_Init(SIIC_SDA_PORT,&GPIO_Initure);     //初始化    SIIC_SDA_H;    SIIC_SCL_H;}//产生SIIC起始信号void SIIC_Start(void){    SIIC_SDA_OUT();     //sda线输出    SIIC_SDA_H;    SIIC_SCL_H;    SIIC_SPEED_START_DELAY();    SIIC_SDA_L;//START:when CLK is high,DATA change form high to low    SIIC_SPEED_DELAY();    SIIC_SCL_L;//钳住I2C总线，准备发送或接收数据}//产生SIIC停止信号void SIIC_Stop(void){    SIIC_SDA_OUT();//sda线输出    SIIC_SCL_L;    SIIC_SDA_L;//STOP:when CLK is high DATA change form low to high    SIIC_SPEED_START_DELAY();    SIIC_SCL_H;    SIIC_SPEED_DELAY();    SIIC_SDA_H;//发送I2C总线结束信号}//等待应答信号到来//返回值：1，接收应答失败//        0，接收应答成功uint8_t SIIC_Wait_Ack(void){    uint8_t ucErrTime=0;    SIIC_SIIC_SDA_IN();    SIIC_SDA_H;    SIIC_SCL_H;    SIIC_SPEED_DELAY();    while(SIIC_SIIC_SDA_Read())    {        ucErrTime++;        if(ucErrTime>250)        {            SIIC_Stop();            return 1;        }        SIIC_SPEED_DELAY();    }    SIIC_SCL_L;//时钟输出0    return 0;}//产生ACK应答void SIIC_Ack(void){    SIIC_SCL_L;    SIIC_SDA_OUT();    SIIC_SDA_L;    SIIC_SPEED_DELAY();    SIIC_SCL_H;    SIIC_SPEED_DELAY();    SIIC_SCL_L;}//不产生ACK应答void SIIC_NAck(void){    SIIC_SCL_L;    SIIC_SDA_OUT();    SIIC_SDA_H;    SIIC_SPEED_DELAY();    SIIC_SCL_H;    SIIC_SPEED_DELAY();    SIIC_SCL_L;}//SIIC发送一个字节//返回从机有无应答//1，有应答//0，无应答void SIIC_Send_Byte(uint8_t txd){    uint8_t t;    SIIC_SDA_OUT();    SIIC_SCL_L;//拉低时钟开始数据传输    for(t=0; t<8; t++)    {        SIIC_SIIC_SDA_Write(((txd&0x80)>>7));        txd<<=1;        SIIC_SPEED_DELAY();   //对TEA5767这三个延时都是必须的        SIIC_SCL_H;        SIIC_SPEED_DELAY();        SIIC_SCL_L;        SIIC_SPEED_DELAY();    }}//读1个字节，ack=1时，发送ACK，ack=0，发送nACKuint8_t SIIC_Read_Byte(unsigned char ack){    unsigned char i,receive=0;    SIIC_SIIC_SDA_IN();//SDA设置为输入    SIIC_SPEED_START_DELAY();    for(i=0; i<8; i++ )    {        SIIC_SCL_L;        SIIC_SPEED_DELAY();        SIIC_SCL_H;        receive<<=1;        if(SIIC_SIIC_SDA_Read())        {            receive++;        }        SIIC_SPEED_DELAY();    }    if (!ack)        SIIC_NAck();//发送nACK    else        SIIC_Ack(); //发送ACK    return receive;}

2 ft5206驱动

#include "ft5206.h"#include "siic.h"//I2C读写命令#define FT_CMD_WR 				0X70    	//写命令#define FT_CMD_RD 				0X71		//读命令//FT5206 部分寄存器定义#define FT_DEVIDE_MODE 					0x00   		//FT5206模式控制寄存器#define FT_REG_NUM_FINGER       0x02		//触摸状态寄存器#define FT_TP1_REG 				0X03	  	//第一个触摸点数据地址#define FT_TP2_REG 				0X09		//第二个触摸点数据地址#define FT_TP3_REG 				0X0F		//第三个触摸点数据地址#define FT_TP4_REG 				0X15		//第四个触摸点数据地址#define FT_TP5_REG 				0X1B		//第五个触摸点数据地址  #define	FT_ID_G_LIB_VERSION		0xA1		//版本		#define FT_ID_G_MODE 			   	0xA4   		//FT5206中断模式控制寄存器#define FT_ID_G_THGROUP				0x80   		//触摸有效值设置寄存器#define FT_ID_G_PERIODACTIVE	0x88   		//激活状态周期设置寄存器static const uint16_t FT5206_TPX_TBL[5]={FT_TP1_REG,FT_TP2_REG,FT_TP3_REG,FT_TP4_REG,FT_TP5_REG};static void delay_ms(uint32_t time){    HAL_Delay(time);}uint8_t FT5206_WR_Reg(uint16_t reg,uint8_t *buf,uint8_t len){    uint8_t i;    uint8_t ret=0;    SIIC_Start();    SIIC_Send_Byte(FT_CMD_WR);	//发送写命令    SIIC_Wait_Ack();    SIIC_Send_Byte(reg&0XFF);   	//发送低8位地址    SIIC_Wait_Ack();    for(i=0; i
   
    touch_num = touch_num;	if((touch_num&0XF)&&((touch_num&0XF)<6)) {	 for(int i = 0;i
    
     dir){			 y = ((uint16_t)(buf[0]&0X0F)<<8)+buf[1];			 x = ((uint16_t)(buf[2]&0X0F)<<8)+buf[3];		 }else{			x = touch->pix_h - (((uint16_t)(buf[0]&0X0F)<<8)+buf[1]);		  y = ((uint16_t)(buf[2]&0X0F)<<8)+buf[3];		 }		 touch->x[i] = x;		 touch->y[i] = y;	 } }else{	 touch->touch_num = 0;	 return 0; } return touch_num;}
    
   

3 touch.h头文件

这个的目的是为了兼容不同种类的触摸屏, 虽然我只有一块屏幕

#ifndef _touch_H#define _touch_H#include "main.h"#define TOUCH_MAX_NUM 5typedef struct TouchTypedef_TAG{	uint8_t touch_type;	uint8_t dir;	uint16_t pix_w;	uint16_t pix_h;	uint8_t touch_num;	uint16_t x[TOUCH_MAX_NUM];	uint16_t y[TOUCH_MAX_NUM];}TouchTypedef;#endif

3 添加触摸驱动到touchgfx中

extern "C"{	#include "ft5206.h"	void ft5206_init(void);	uint8_t ft5206_scan(TouchTypedef *touch);}TouchTypedef mtouch;void STM32TouchController::init(){    /**     * Initialize touch controller and driver     *     */	ft5206_init();	mtouch.dir = PIXELS_DIR;	mtouch.pix_h = PIXELS_H;	mtouch.pix_w = PIXELS_W;}bool STM32TouchController::sampleTouch(int32_t& x, int32_t& y){    /**     * By default sampleTouch returns false,     * return true if a touch has been detected, otherwise false.     *     * Coordinates are passed to the caller by reference by x and y.     *     * This function is called by the TouchGFX framework.     * By default sampleTouch is called every tick, this can be adjusted by HAL::setTouchSampleRate(int8_t);     *     */		if(ft5206_scan(&mtouch)){			x = mtouch.x[0];			y = mtouch.y[0];			return true;		}    return false;}

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