TOUCH-GT911

begin()

功能:

初始化I2C总线

函数原型:

esp_err_t begin(uint8_t pin_sda, uint8_t pin_scl, uint8_t pin_int)

avaliable()

功能:

是否有新的屏幕触摸数据待读取

函数原型:

bool avaliable()

update()

功能:

刷新屏幕检测

函数原型:

void update()

SetRotation()

功能:

设置屏幕旋转角度/通常设置为90°

函数原型:

void SetRotation(uint16_t rotate)

readFingerX()

功能:

读取触摸手指X坐标

函数原型:

uint16_t readFingerX(uint8_t num)

readFingerY()

功能:

读取触摸手指Y坐标

函数原型:

uint16_t readFingerY(uint8_t num)

readFingerID()

功能:

读取触摸手指ID坐标

函数原型:

uint16_t readFingerID(uint8_t num)

readFingerSize()

功能:

读取触摸手指作用区域矩形大小

函数原型:

uint16_t readFingerSize(uint8_t num)

getFingerNum()

功能:

最后一次读取触摸手指数量

函数原型:

uint8_t getFingerNum(void)

isFingerUp()

功能:

检测手指是否抬起

函数原型:

bool isFingerUp(void)

flush()

功能:

将当前触摸状态清空

函数原型:

void flush(void)

readFinger()

功能:

读取触摸手指信息,返回结构体实例

函数原型:

tp_finger_t readFinger(uint8_t num)

结构体实例:

typedef struct
{
    uint16_t x;
    uint16_t y;
    uint16_t id;
    uint16_t size;
}tp_finger_t;

使用示例:

#include <M5EPD.h>

M5EPD_Canvas canvas(&M5.EPD);

int point[2][2];

void setup()
{
    M5.begin();
    M5.EPD.SetRotation(90);
    M5.TP.SetRotation(90);
    M5.EPD.Clear(true);
    canvas.createCanvas(540, 960);
    canvas.setTextSize(5);
    canvas.drawString("Touch The Screen!", 20, 400);
    canvas.pushCanvas(0,0,UPDATE_MODE_DU4);
}

void loop()
{

    if(M5.TP.avaliable()){
        if(!M5.TP.isFingerUp()){
            M5.TP.update();
            canvas.fillCanvas(0);
            bool is_upadte = false;
            for(int i=0;i<2; i++){
                tp_finger_t FingerItem = M5.TP.readFinger(i);
                if((point[i][0]!=FingerItem.x)||(point[i][1]!=FingerItem.y)){
                    is_upadte = true;
                    point[i][0] = FingerItem.x;
                    point[i][1] = FingerItem.y;
                    canvas.fillRect(FingerItem.x-50, FingerItem.y-50, 100, 100, 15);
                    Serial.printf("Finger ID:%d-->X: %d*C  Y: %d  Size: %d\r\n", FingerItem.id, FingerItem.x, FingerItem.y , FingerItem.size);
                }
            }
            if(is_upadte)
            {
                canvas.pushCanvas(0,0,UPDATE_MODE_DU4);
            }
        }
    }
}