lcd_model/BSP/gt911.c

#include "gt911.h"
#include "math.h"
#include <stdlib.h>

//GT911（原GT9147）配置参数表
//第一个字节为版本号(0X60),必须保证新的版本号大于等于GT911内部
//flash原有版本号,才会更新配置.
const uint8_t GT9147_CFG_TBL[]=
{ 
	0X60,0XE0,0X01,0X20,0X03,0X05,0X35,0X00,0X02,0X08,
	0X1E,0X08,0X50,0X3C,0X0F,0X05,0X00,0X00,0XFF,0X67,
	0X50,0X00,0X00,0X18,0X1A,0X1E,0X14,0X89,0X28,0X0A,
	0X30,0X2E,0XBB,0X0A,0X03,0X00,0X00,0X02,0X33,0X1D,
	0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X32,0X00,0X00,
	0X2A,0X1C,0X5A,0X94,0XC5,0X02,0X07,0X00,0X00,0X00,
	0XB5,0X1F,0X00,0X90,0X28,0X00,0X77,0X32,0X00,0X62,
	0X3F,0X00,0X52,0X50,0X00,0X52,0X00,0X00,0X00,0X00,
	0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
	0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X0F,
	0X0F,0X03,0X06,0X10,0X42,0XF8,0X0F,0X14,0X00,0X00,
	0X00,0X00,0X1A,0X18,0X16,0X14,0X12,0X10,0X0E,0X0C,
	0X0A,0X08,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
	0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
	0X00,0X00,0X29,0X28,0X24,0X22,0X20,0X1F,0X1E,0X1D,
	0X0E,0X0C,0X0A,0X08,0X06,0X05,0X04,0X02,0X00,0XFF,
	0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
	0X00,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,
	0XFF,0XFF,0XFF,0XFF
};  

/*创建触摸结构体*/
touch_struct	User_Touch;


void GT911_WriteReg(uint16_t _usRegAddr, uint8_t *_pRegBuf, uint8_t _ucLen)
{
	HAL_I2C_Mem_Write(&GT911_I2C, GT911_DIV_W, _usRegAddr, I2C_MEMADD_SIZE_16BIT, _pRegBuf, _ucLen, 0xff);
}
void GT911_ReadReg(uint16_t _usRegAddr, uint8_t *_pRegBuf, uint8_t _ucLen)
{
	HAL_I2C_Mem_Read(&GT911_I2C, GT911_DIV_R, _usRegAddr, I2C_MEMADD_SIZE_16BIT, _pRegBuf, _ucLen, 0xff);
}


/*
	配置gt911，发送gt911配置参数
	参数1：mode（0,参数不保存到flash1,参数保存到flash）
*/
void GT911_Send_Config(uint8_t mode)
{
	uint8_t buf[2];
	
	buf[0] = 0;
	buf[1] = mode;	//是否写入到GT9147 FLASH?  即是否掉电保存
	for(uint8_t i=0; i<sizeof(GT9147_CFG_TBL); i++)
	{
		buf[0] += GT9147_CFG_TBL[i];//计算校验和
	}
  buf[0]=(~buf[0])+1;
	
	GT911_WriteReg(GT_CFGS_REG, (uint8_t *)GT9147_CFG_TBL, sizeof(GT9147_CFG_TBL));//发送寄存器配置
	
	GT911_WriteReg(GT_CHECK_REG, buf, 2);//写入校验和,和配置更新标记
}


/*
	功能：软件复位gt911
	参数1：gt_SR_type（为1时开始软件复位,为0时结束软件复位）
*/
void GT911_Software_Reset(uint8_t gt_SR_type)
{
	uint8_t _temp=0;	//中间变量
	if(gt_SR_type)
	{
		_temp=2;
		GT911_WriteReg(GT_CTRL_REG, &_temp, 1);
	}
	else
	{
		_temp=0;
		GT911_WriteReg(GT_CTRL_REG, &_temp, 1);
	}
}

/*
	功能：gt911触摸扫描，判断当前是否被触摸
	参数1：
*/


uint8_t GT911_Scanf(void)
{
	if(User_Touch.status & 0x40)
	{
		uint8_t touch_status = 0;
		
		GT911_ReadReg(GT_GSTID_REG, &touch_status, 1);
		
		User_Touch.number = (touch_status & 0x0f);	//获取触摸点数
		User_Touch.state = (TOUCH_STATE_enum)(touch_status & 0x80);	//触摸状态
		
		switch(User_Touch.state)	//判断是否有触摸数据
		{
			case TOUCH__NO:{		//没有数据
				User_Touch.state &= 0x7F;
				return 0;
			}break;
			case TOUCH_ING:{		//触摸中~后，有数据，并读出数据
				
				/*
				if(User_Touch.number == 0)
				{
					break;
				}
				*/
				
				
				uint8_t _temp = 0;	//中间变量
				//static uint8_t touch_data[30];
				//GT911_ReadReg(GT_TPD_Sta, touch_data, User_Touch.number * 6);
				// 处理触摸数据
				
				for (int i = 0; i < User_Touch.number; i++)
				{
					/*
					User_Touch.point[i].x = touch_data[i * 8 + X_L] | touch_data[i * 8 + X_H] << 8;
					User_Touch.point[i].y = touch_data[i * 8 + Y_L] | touch_data[i * 8 + Y_H] << 8;
					User_Touch.point[i].s = touch_data[i * 8 + S_L] | touch_data[i * 8 + S_H] << 8;
					*/
					uint16_t x = 0,y = 0;
					
					
					GT911_ReadReg((GT_TPD_Sta + i*8 + X_L), &_temp, 1);	//读出触摸x坐标的低8位
					x  = _temp;
					GT911_ReadReg((GT_TPD_Sta + i*8 + X_H), &_temp, 1);	//读出触摸x坐标的高8位
					x |= (_temp<<8);
					
					GT911_ReadReg((GT_TPD_Sta + i*8 + Y_L), &_temp, 1);	//读出触摸y坐标的低8位
					y  = _temp;
					GT911_ReadReg((GT_TPD_Sta + i*8 + Y_H), &_temp, 1);	//读出触摸y坐标的高8位
					y |= (_temp<<8);
					
					GT911_ReadReg((GT_TPD_Sta + i*8 + S_L), &_temp, 1);	//读出触摸大小数据的低8位
					User_Touch.point[i].s  = _temp;
					GT911_ReadReg((GT_TPD_Sta + i*8 + S_H), &_temp, 1);	//读出触摸大小数据的高8位
					User_Touch.point[i].s |= (_temp<<8);
					
					User_Touch.point[i].x = abs(480 - y);
					User_Touch.point[i].y = x;
					
					
					
					
				}
				// 清除标志位
				touch_status = 0;
				GT911_WriteReg(GT_GSTID_REG, &touch_status, 1);
			}break;
		}
	
		User_Touch.status &= 0xBF;
		
	}
	
	return User_Touch.number;
}



void GT911_getPos(uint16_t *x,uint16_t *y)
{
	(*x) = User_Touch.point[0].x;
	(*y) = User_Touch.point[0].y;
}






void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
	//return;
    if (GPIO_Pin == CTP_INIT_Pin)
    {
		if(User_Touch.status & 0x80)
		{
			User_Touch.status |= 0x40;
		}
    }
}





/*
* 函数名称： GT911_Init
* 功能描述： 初始化GT911触摸屏
* 传入参数： 无
*   返回值： 0,初始化成功;1,初始化失败
*/
 
uint8_t GT911_Init(uint8_t addr)
{
	GPIO_InitTypeDef GPIO_InitStruct = {0};
	
	GPIO_InitStruct.Pin = CTP_RST_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_PULLUP;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	HAL_GPIO_Init(CTP_RST_GPIO_Port, &GPIO_InitStruct);
	
	GPIO_InitStruct.Pin = CTP_INIT_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_PULLUP;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	HAL_GPIO_Init(CTP_INIT_GPIO_Port, &GPIO_InitStruct);
	
	
	if(addr == 0x28)
	{
		HAL_GPIO_WritePin(CTP_RST_GPIO_Port,CTP_RST_Pin,GPIO_PIN_RESET);
		HAL_Delay(1000);
		HAL_GPIO_WritePin(CTP_INIT_GPIO_Port,CTP_INIT_Pin,GPIO_PIN_RESET);
		HAL_Delay(1000);
		HAL_GPIO_WritePin(CTP_INIT_GPIO_Port,CTP_INIT_Pin,GPIO_PIN_SET);
		HAL_Delay(1000);
		HAL_GPIO_WritePin(CTP_RST_GPIO_Port,CTP_RST_Pin,GPIO_PIN_SET);
		HAL_Delay(2000);
	}
	else //默认是 0xBA
	{
		HAL_GPIO_WritePin(CTP_RST_GPIO_Port,CTP_RST_Pin,GPIO_PIN_RESET);
		HAL_Delay(1000);
		HAL_GPIO_WritePin(CTP_INIT_GPIO_Port,CTP_INIT_Pin,GPIO_PIN_RESET);
		HAL_Delay(1000);
		HAL_GPIO_WritePin(CTP_RST_GPIO_Port,CTP_RST_Pin,GPIO_PIN_SET);
		HAL_Delay(2000);
	}
	
	GPIO_InitStruct.Pin = CTP_INIT_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(CTP_INIT_GPIO_Port, &GPIO_InitStruct);
	
	HAL_Delay(100);
	
	//Software_Reset(1);
	User_Touch.status = 0x80;
	User_Touch.state = (TOUCH_STATE_enum)0;
	User_Touch.number = 0;
	
	//Software_Reset(0);

	return 0;
}