FT6206.h

00001 /*
00002 Copyright (c) 2015 Jack Berkhout
00003 
00004 Permission is hereby granted, free of charge, to any person obtaining a copy
00005 of this software and associated documentation files (the "Software"), to deal
00006 in the Software without restriction, including without limitation the rights
00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008 copies of the Software, and to permit persons to whom the Software is
00009 furnished to do so, subject to the following conditions:
00010  
00011 The above copyright notice and this permission notice shall be included in
00012 all copies or substantial portions of the Software.
00013  
00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020 THE SOFTWARE.
00021 
00022 This is a library for the Adafruit Capacitive Touch Screens
00023   ----> http://www.adafruit.com/products/1947
00024 This chipset uses I2C to communicate
00025 
00026 Based on code by Limor Fried/Ladyada for Adafruit Industries.
00027 MIT license, all text above must be included in any redistribution.
00028 
00029 On the shield, these jumpers were bridged:
00030 Int - #7 (default)
00031 SCK - 13 (default)
00032 SO  - 12 (default)
00033 SI  - 11
00034 SCL - SCL
00035 SDA - SDA
00036 
00037 Usage:
00038 
00039 #include "mbed.h"
00040 #include "SPI_TFT_ILI9341.h"
00041 #include "FT6206.h"
00042 #include "Arial12x12.h"
00043 
00044 #define PIN_XP          A3
00045 #define PIN_XM          A1
00046 #define PIN_YP          A2
00047 #define PIN_YM          A0
00048 #define PIN_SCLK        D13
00049 #define PIN_MISO        D12
00050 #define PIN_MOSI        D11
00051 #define PIN_CS_TFT      D10  // chip select pin
00052 #define PIN_DC_TFT      D9   // data/command select pin.
00053 #define PIN_RESET_TFT   D8
00054 //#define PIN_BL_TFT      D7
00055 #define PIN_CS_SD       D4
00056 
00057 #define PORTRAIT        0
00058 #define LANDSCAPE       1
00059 
00060 #define PIN_SCL_FT6206  P0_28
00061 #define PIN_SDA_FT6206  P0_27
00062 #define PIN_INT_FT6206  D7
00063 
00064 SPI_TFT_ILI9341 TFT(PIN_MOSI, PIN_MISO, PIN_SCLK, PIN_CS_TFT, PIN_RESET_TFT, PIN_DC_TFT, "TFT"); // mosi, miso, sclk, cs, reset, dc 
00065 FT6206 FT6206(PIN_SDA_FT6206, PIN_SCL_FT6206, PIN_INT_FT6206); // sda, scl, int
00066 
00067 int main()
00068 {
00069     //Configure the display driver
00070     TFT.claim(stdout);
00071     TFT.background(Black);
00072     TFT.foreground(White);
00073     TFT.set_orientation(LANDSCAPE);
00074     TFT.cls();
00075 
00076     //Print a welcome message
00077     TFT.set_font((unsigned char*) Arial12x12);
00078     TFT.locate(0,0);
00079     TFT.printf("Hello mbed!\n");
00080 
00081     while(1) {
00082         int X1, Y1, X2, Y2;
00083         TS_Point p;
00084         if (FT6206.getTouchPoint(p)) {
00085             X1 = X2;
00086             Y1 = Y2;
00087             X2 = p.x;
00088             Y2 = p.y;
00089             TFT.locate(0,12);
00090             printf("Touch %3d %3d\n", p.x, p.y);
00091             if ((X1 > 0) && (Y1 > 0) && (X2 > 0) && (Y2 > 0)) {
00092                 TFT.line(X1, Y1, X2, Y2, RGB(255,128,255));
00093             }
00094         }
00095     }
00096 }
00097 */
00098 
00099 #ifndef FT6206_H
00100 #define FT6206_H
00101 
00102 #include "mbed.h"
00103 
00104 #define FT6206_I2C_FREQUENCY      400000
00105 
00106 #define FT6206_ADDR           0x38
00107 #define FT6206_G_FT5201ID     0xA8
00108 #define FT6206_REG_NUMTOUCHES 0x02
00109 
00110 #define FT6206_NUM_X             0x33
00111 #define FT6206_NUM_Y             0x34
00112 
00113 #define FT6206_REG_MODE 0x00
00114 #define FT6206_REG_CALIBRATE 0x02
00115 #define FT6206_REG_WORKMODE 0x00
00116 #define FT6206_REG_FACTORYMODE 0x40
00117 #define FT6206_REG_THRESHHOLD 0x80
00118 #define FT6206_REG_POINTRATE 0x88
00119 #define FT6206_REG_FIRMVERS 0xA6
00120 #define FT6206_REG_CHIPID 0xA3
00121 #define FT6206_REG_VENDID 0xA8
00122 
00123 // calibrated for Adafruit 2.8" ctp screen
00124 #define FT6206_DEFAULT_THRESSHOLD 0x80
00125 
00126 #define ILI9341_TFTWIDTH  320
00127 #define ILI9341_TFTHEIGHT 240
00128 
00129 class TS_Point {
00130  public:
00131     TS_Point(void);
00132     TS_Point(int16_t x, int16_t y, int16_t z);
00133     
00134     bool operator==(TS_Point);
00135     bool operator!=(TS_Point);
00136     
00137     int16_t x, y, z;
00138 };
00139 
00140 class FT6206 {
00141   public:
00142     //!Creates an instance of the class.
00143     /*!
00144     FT6206 display touchscreen at I2C using I2C port pins sda, scl, and interrupt pins.
00145     TMP102
00146     \param sda, scl, interrupt
00147     */
00148     FT6206(PinName sda, PinName scl, PinName interrupt);
00149 
00150     /*!
00151     Destroys instance.
00152     */ 
00153     ~FT6206();
00154 
00155     bool init(uint8_t thresh = FT6206_DEFAULT_THRESSHOLD);  
00156 
00157     void writeRegister8(char reg, char val);
00158     char readRegister8(char reg);
00159     char dataReceived(void);
00160 
00161     void readData(uint16_t *x, uint16_t *y);
00162     
00163     bool touched(void);
00164     TS_Point getPoint(void);
00165     TS_Point clearPoint(void);
00166 
00167     void checkDataReceived(void);
00168     
00169     bool getDataReceived(void);
00170 
00171     void waitScreenTapped(void);
00172 
00173     bool getTouchPoint(TS_Point &p);
00174 
00175     Ticker tick;
00176 
00177  private:
00178 //    DigitalIn m_interrupt; 
00179     InterruptIn m_interrupt;
00180 
00181     I2C m_i2c;
00182     int m_addr;
00183     char data[2];
00184 
00185     uint8_t touches;
00186     uint16_t touchX[2], touchY[2], touchID[2];
00187     
00188     bool DataReceived;
00189 
00190 
00191 };
00192 
00193 #endif
00194