FT6206 Library for Adafruit 2.8" TFT Touch Shield for Arduino w/Capacitive Touch
Dependents: ArchPro_TFT ATT_AWS_IoT_demo_v06 ArchPro_TFT TermProject
FT6206.cpp@6:eb7a74dc809f, 2015-03-24 (annotated)
- Committer:
- JackB
- Date:
- Tue Mar 24 01:21:55 2015 +0000
- Revision:
- 6:eb7a74dc809f
- Parent:
- 5:652684757b6b
- Child:
- 7:3896a0daed43
updated
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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JackB | 4:b9ff3c020e7f | 1 | /* |
JackB | 4:b9ff3c020e7f | 2 | Copyright (c) 2015 Jack Berkhout |
JackB | 0:d146e986a07f | 3 | |
JackB | 4:b9ff3c020e7f | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
JackB | 4:b9ff3c020e7f | 5 | of this software and associated documentation files (the "Software"), to deal |
JackB | 4:b9ff3c020e7f | 6 | in the Software without restriction, including without limitation the rights |
JackB | 4:b9ff3c020e7f | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
JackB | 4:b9ff3c020e7f | 8 | copies of the Software, and to permit persons to whom the Software is |
JackB | 4:b9ff3c020e7f | 9 | furnished to do so, subject to the following conditions: |
JackB | 4:b9ff3c020e7f | 10 | |
JackB | 4:b9ff3c020e7f | 11 | The above copyright notice and this permission notice shall be included in |
JackB | 4:b9ff3c020e7f | 12 | all copies or substantial portions of the Software. |
JackB | 4:b9ff3c020e7f | 13 | |
JackB | 4:b9ff3c020e7f | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
JackB | 4:b9ff3c020e7f | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
JackB | 4:b9ff3c020e7f | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
JackB | 4:b9ff3c020e7f | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
JackB | 4:b9ff3c020e7f | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
JackB | 4:b9ff3c020e7f | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
JackB | 4:b9ff3c020e7f | 20 | THE SOFTWARE. |
JackB | 0:d146e986a07f | 21 | |
JackB | 4:b9ff3c020e7f | 22 | This is a library for the Adafruit Capacitive Touch Screens |
JackB | 4:b9ff3c020e7f | 23 | ----> http://www.adafruit.com/products/1947 |
JackB | 4:b9ff3c020e7f | 24 | This chipset uses I2C to communicate |
JackB | 4:b9ff3c020e7f | 25 | |
JackB | 4:b9ff3c020e7f | 26 | Based on Arduino written by Limor Fried/Ladyada for Adafruit Industries. |
JackB | 4:b9ff3c020e7f | 27 | |
JackB | 4:b9ff3c020e7f | 28 | On the shield, these jumpers were bridged: |
JackB | 4:b9ff3c020e7f | 29 | Int - #7 (default) |
JackB | 4:b9ff3c020e7f | 30 | SCK - 13 (default) |
JackB | 4:b9ff3c020e7f | 31 | SO - 12 (default) |
JackB | 4:b9ff3c020e7f | 32 | SI - 11 |
JackB | 4:b9ff3c020e7f | 33 | SCL - SCL |
JackB | 4:b9ff3c020e7f | 34 | SDA - SDA |
JackB | 4:b9ff3c020e7f | 35 | |
JackB | 2:35e21af6733c | 36 | Usage: |
JackB | 1:43274ec89d1a | 37 | |
JackB | 3:8e16a8987166 | 38 | #include "mbed.h" |
JackB | 3:8e16a8987166 | 39 | #include "SPI_TFT_ILI9341.h" |
JackB | 3:8e16a8987166 | 40 | #include "FT6206.h" |
JackB | 3:8e16a8987166 | 41 | #include "Arial12x12.h" |
JackB | 3:8e16a8987166 | 42 | |
JackB | 3:8e16a8987166 | 43 | #define PIN_XP A3 |
JackB | 3:8e16a8987166 | 44 | #define PIN_XM A1 |
JackB | 3:8e16a8987166 | 45 | #define PIN_YP A2 |
JackB | 3:8e16a8987166 | 46 | #define PIN_YM A0 |
JackB | 3:8e16a8987166 | 47 | #define PIN_SCLK D13 |
JackB | 3:8e16a8987166 | 48 | #define PIN_MISO D12 |
JackB | 3:8e16a8987166 | 49 | #define PIN_MOSI D11 |
JackB | 3:8e16a8987166 | 50 | #define PIN_CS_TFT D10 // chip select pin |
JackB | 3:8e16a8987166 | 51 | #define PIN_DC_TFT D9 // data/command select pin. |
JackB | 3:8e16a8987166 | 52 | #define PIN_RESET_TFT D8 |
JackB | 3:8e16a8987166 | 53 | //#define PIN_BL_TFT D7 |
JackB | 3:8e16a8987166 | 54 | #define PIN_CS_SD D4 |
JackB | 3:8e16a8987166 | 55 | |
JackB | 3:8e16a8987166 | 56 | #define PORTRAIT 0 |
JackB | 3:8e16a8987166 | 57 | #define LANDSCAPE 1 |
JackB | 3:8e16a8987166 | 58 | |
JackB | 3:8e16a8987166 | 59 | #define PIN_SCL_FT6206 P0_28 |
JackB | 3:8e16a8987166 | 60 | #define PIN_SDA_FT6206 P0_27 |
JackB | 3:8e16a8987166 | 61 | #define PIN_INT_FT6206 D7 |
JackB | 3:8e16a8987166 | 62 | |
JackB | 3:8e16a8987166 | 63 | 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 |
JackB | 3:8e16a8987166 | 64 | FT6206 FT6206(PIN_SDA_FT6206, PIN_SCL_FT6206, PIN_INT_FT6206); // sda, scl, int |
JackB | 3:8e16a8987166 | 65 | |
JackB | 3:8e16a8987166 | 66 | int main() |
JackB | 3:8e16a8987166 | 67 | { |
JackB | 1:43274ec89d1a | 68 | while(1) { |
JackB | 1:43274ec89d1a | 69 | // if (FT6206.touched()) { |
JackB | 1:43274ec89d1a | 70 | if (FT6206.dataReceived()) { |
JackB | 1:43274ec89d1a | 71 | // Retrieve a point |
JackB | 1:43274ec89d1a | 72 | TS_Point p = FT6206.getPoint(); |
JackB | 1:43274ec89d1a | 73 | printf("Touch %3d %3d\n", p.x, p.y); |
JackB | 1:43274ec89d1a | 74 | } |
JackB | 1:43274ec89d1a | 75 | } |
JackB | 3:8e16a8987166 | 76 | } |
JackB | 1:43274ec89d1a | 77 | */ |
JackB | 0:d146e986a07f | 78 | |
JackB | 0:d146e986a07f | 79 | #include "FT6206.h" |
JackB | 0:d146e986a07f | 80 | |
JackB | 0:d146e986a07f | 81 | FT6206::FT6206(PinName sda, PinName scl, PinName interrupt) : m_i2c(sda, scl), m_interrupt(interrupt) |
JackB | 0:d146e986a07f | 82 | { |
JackB | 0:d146e986a07f | 83 | m_addr = (FT6206_ADDR << 1); |
JackB | 0:d146e986a07f | 84 | m_i2c.frequency(FT6206_I2C_FREQUENCY); |
JackB | 0:d146e986a07f | 85 | m_interrupt.mode(PullUp); |
JackB | 0:d146e986a07f | 86 | } |
JackB | 0:d146e986a07f | 87 | |
JackB | 5:652684757b6b | 88 | FT6206::~FT6206() |
JackB | 5:652684757b6b | 89 | { |
JackB | 5:652684757b6b | 90 | |
JackB | 5:652684757b6b | 91 | } |
JackB | 0:d146e986a07f | 92 | |
JackB | 0:d146e986a07f | 93 | /**************************************************************************/ |
JackB | 0:d146e986a07f | 94 | /*! |
JackB | 0:d146e986a07f | 95 | @brief Setups the HW |
JackB | 0:d146e986a07f | 96 | */ |
JackB | 0:d146e986a07f | 97 | /**************************************************************************/ |
JackB | 5:652684757b6b | 98 | bool FT6206::init(uint8_t threshhold) { |
JackB | 0:d146e986a07f | 99 | // change threshhold to be higher/lower |
JackB | 5:652684757b6b | 100 | writeRegister8(FT6206_REG_THRESHHOLD, FT6206_DEFAULT_THRESSHOLD); |
JackB | 0:d146e986a07f | 101 | |
JackB | 0:d146e986a07f | 102 | if (readRegister8(FT6206_REG_VENDID) != 17) |
JackB | 0:d146e986a07f | 103 | return false; |
JackB | 0:d146e986a07f | 104 | |
JackB | 0:d146e986a07f | 105 | if (readRegister8(FT6206_REG_CHIPID) != 6) |
JackB | 0:d146e986a07f | 106 | return false; |
JackB | 0:d146e986a07f | 107 | /* |
JackB | 0:d146e986a07f | 108 | printf("Vend ID: %d\n", readRegister8(FT6206_REG_VENDID)); |
JackB | 0:d146e986a07f | 109 | printf("Chip ID: %d\n", readRegister8(FT6206_REG_CHIPID)); |
JackB | 0:d146e986a07f | 110 | printf("Firm V: %d\n", readRegister8(FT6206_REG_FIRMVERS)); |
JackB | 0:d146e986a07f | 111 | printf("Rate Hz: %d\n", readRegister8(FT6206_REG_POINTRATE)); |
JackB | 0:d146e986a07f | 112 | printf("Thresh: %d\n", readRegister8(FT6206_REG_THRESHHOLD)); |
JackB | 0:d146e986a07f | 113 | */ |
JackB | 0:d146e986a07f | 114 | // dump all registers |
JackB | 0:d146e986a07f | 115 | /* |
JackB | 0:d146e986a07f | 116 | for (int16_t i=0; i<0x20; i++) { |
JackB | 0:d146e986a07f | 117 | printf("I2C $%02x = 0x %02x\n", i, readRegister8(i)); |
JackB | 0:d146e986a07f | 118 | } |
JackB | 0:d146e986a07f | 119 | */ |
JackB | 0:d146e986a07f | 120 | return true; |
JackB | 0:d146e986a07f | 121 | } |
JackB | 0:d146e986a07f | 122 | |
JackB | 0:d146e986a07f | 123 | bool FT6206::touched(void) { |
JackB | 0:d146e986a07f | 124 | uint8_t n = readRegister8(FT6206_REG_NUMTOUCHES); |
JackB | 0:d146e986a07f | 125 | if ((n == 1) || (n == 2)) |
JackB | 0:d146e986a07f | 126 | return true; |
JackB | 0:d146e986a07f | 127 | return false; |
JackB | 0:d146e986a07f | 128 | } |
JackB | 0:d146e986a07f | 129 | |
JackB | 6:eb7a74dc809f | 130 | bool FT6206::getTouchPoint(TS_Point &p) { |
JackB | 6:eb7a74dc809f | 131 | if (dataReceived()) { |
JackB | 6:eb7a74dc809f | 132 | // Retrieve a point |
JackB | 6:eb7a74dc809f | 133 | p = getPoint(); |
JackB | 6:eb7a74dc809f | 134 | return true; |
JackB | 6:eb7a74dc809f | 135 | } |
JackB | 6:eb7a74dc809f | 136 | return false; |
JackB | 6:eb7a74dc809f | 137 | } |
JackB | 6:eb7a74dc809f | 138 | |
JackB | 0:d146e986a07f | 139 | /*****************************/ |
JackB | 0:d146e986a07f | 140 | |
JackB | 0:d146e986a07f | 141 | void FT6206::readData(uint16_t *x, uint16_t *y) { |
JackB | 0:d146e986a07f | 142 | char i2cdat[16]; |
JackB | 0:d146e986a07f | 143 | |
JackB | 0:d146e986a07f | 144 | m_i2c.write(m_addr, 0x00, 1); |
JackB | 0:d146e986a07f | 145 | m_i2c.read(m_addr, i2cdat, 16); |
JackB | 0:d146e986a07f | 146 | |
JackB | 0:d146e986a07f | 147 | /* |
JackB | 0:d146e986a07f | 148 | for (int16_t i=0; i<0x20; i++) { |
JackB | 0:d146e986a07f | 149 | printf("I2C %02x = %02x\n", i, i2cdat[i]);; |
JackB | 0:d146e986a07f | 150 | } |
JackB | 0:d146e986a07f | 151 | */ |
JackB | 0:d146e986a07f | 152 | |
JackB | 0:d146e986a07f | 153 | touches = i2cdat[0x02]; |
JackB | 0:d146e986a07f | 154 | |
JackB | 0:d146e986a07f | 155 | // printf("touches: %d\n", touches); |
JackB | 0:d146e986a07f | 156 | if (touches > 2) { |
JackB | 0:d146e986a07f | 157 | touches = 0; |
JackB | 0:d146e986a07f | 158 | *x = *y = 0; |
JackB | 0:d146e986a07f | 159 | } |
JackB | 0:d146e986a07f | 160 | if (touches == 0) { |
JackB | 0:d146e986a07f | 161 | *x = *y = 0; |
JackB | 0:d146e986a07f | 162 | return; |
JackB | 0:d146e986a07f | 163 | } |
JackB | 0:d146e986a07f | 164 | |
JackB | 0:d146e986a07f | 165 | /* |
JackB | 0:d146e986a07f | 166 | if (touches == 2) Serial.print('2'); |
JackB | 0:d146e986a07f | 167 | for (uint8_t i=0; i<16; i++) { |
JackB | 0:d146e986a07f | 168 | printf("%02x ", i2cdat[i]); |
JackB | 0:d146e986a07f | 169 | } |
JackB | 0:d146e986a07f | 170 | printf("\n"); |
JackB | 0:d146e986a07f | 171 | */ |
JackB | 0:d146e986a07f | 172 | |
JackB | 0:d146e986a07f | 173 | /* |
JackB | 0:d146e986a07f | 174 | printf("\n"); |
JackB | 0:d146e986a07f | 175 | if (i2cdat[0x01] != 0x00) { |
JackB | 0:d146e986a07f | 176 | printf("Gesture #%d\n", i2cdat[0x01]); |
JackB | 0:d146e986a07f | 177 | } |
JackB | 0:d146e986a07f | 178 | */ |
JackB | 0:d146e986a07f | 179 | |
JackB | 0:d146e986a07f | 180 | //printf("# Touches: %d", touches); |
JackB | 0:d146e986a07f | 181 | for (uint8_t i=0; i<2; i++) { |
JackB | 0:d146e986a07f | 182 | touchY[i] = i2cdat[0x03 + i*6] & 0x0F; |
JackB | 0:d146e986a07f | 183 | touchY[i] <<= 8; |
JackB | 0:d146e986a07f | 184 | touchY[i] |= i2cdat[0x04 + i*6]; |
JackB | 0:d146e986a07f | 185 | touchX[i] = i2cdat[0x05 + i*6] & 0x0F; |
JackB | 0:d146e986a07f | 186 | touchX[i] <<= 8; |
JackB | 0:d146e986a07f | 187 | touchX[i] |= i2cdat[0x06 + i*6]; |
JackB | 0:d146e986a07f | 188 | touchID[i] = i2cdat[0x05 + i*6] >> 4; |
JackB | 0:d146e986a07f | 189 | } |
JackB | 0:d146e986a07f | 190 | /* |
JackB | 0:d146e986a07f | 191 | for (uint8_t i=0; i<touches; i++) { |
JackB | 0:d146e986a07f | 192 | printf("ID #%d (%d, %d", touchID[i], touchX[i], touchY[i]); |
JackB | 0:d146e986a07f | 193 | printf(")\n"); |
JackB | 0:d146e986a07f | 194 | } |
JackB | 0:d146e986a07f | 195 | */ |
JackB | 0:d146e986a07f | 196 | *x = ILI9341_TFTWIDTH - touchX[0]; |
JackB | 0:d146e986a07f | 197 | *y = touchY[0]; |
JackB | 0:d146e986a07f | 198 | } |
JackB | 0:d146e986a07f | 199 | |
JackB | 0:d146e986a07f | 200 | TS_Point FT6206::getPoint(void) { |
JackB | 0:d146e986a07f | 201 | uint16_t x, y; |
JackB | 0:d146e986a07f | 202 | readData(&x, &y); |
JackB | 0:d146e986a07f | 203 | return TS_Point(x, y, 1); |
JackB | 0:d146e986a07f | 204 | } |
JackB | 0:d146e986a07f | 205 | |
JackB | 0:d146e986a07f | 206 | char FT6206::readRegister8(char reg) { |
JackB | 0:d146e986a07f | 207 | char val; |
JackB | 0:d146e986a07f | 208 | m_i2c.write(m_addr, ®, 1); |
JackB | 0:d146e986a07f | 209 | m_i2c.read(m_addr, &val, 1); |
JackB | 0:d146e986a07f | 210 | return val; |
JackB | 0:d146e986a07f | 211 | } |
JackB | 0:d146e986a07f | 212 | |
JackB | 0:d146e986a07f | 213 | void FT6206::writeRegister8(char reg, char val) { |
JackB | 0:d146e986a07f | 214 | char data[2]; |
JackB | 0:d146e986a07f | 215 | data[0] = reg; |
JackB | 0:d146e986a07f | 216 | data[1] = val; |
JackB | 0:d146e986a07f | 217 | m_i2c.write((int)FT6206_ADDR, data, 2); |
JackB | 0:d146e986a07f | 218 | } |
JackB | 0:d146e986a07f | 219 | |
JackB | 0:d146e986a07f | 220 | char FT6206::dataReceived(void) { |
JackB | 0:d146e986a07f | 221 | return !m_interrupt; |
JackB | 0:d146e986a07f | 222 | } |
JackB | 0:d146e986a07f | 223 | |
JackB | 0:d146e986a07f | 224 | /****************/ |
JackB | 0:d146e986a07f | 225 | |
JackB | 0:d146e986a07f | 226 | TS_Point::TS_Point(void) { |
JackB | 0:d146e986a07f | 227 | x = y = 0; |
JackB | 0:d146e986a07f | 228 | } |
JackB | 0:d146e986a07f | 229 | |
JackB | 0:d146e986a07f | 230 | TS_Point::TS_Point(int16_t x0, int16_t y0, int16_t z0) { |
JackB | 0:d146e986a07f | 231 | x = x0; |
JackB | 0:d146e986a07f | 232 | y = y0; |
JackB | 0:d146e986a07f | 233 | z = z0; |
JackB | 0:d146e986a07f | 234 | } |
JackB | 0:d146e986a07f | 235 | |
JackB | 0:d146e986a07f | 236 | bool TS_Point::operator==(TS_Point p1) { |
JackB | 0:d146e986a07f | 237 | return ((p1.x == x) && (p1.y == y) && (p1.z == z)); |
JackB | 0:d146e986a07f | 238 | } |
JackB | 0:d146e986a07f | 239 | |
JackB | 0:d146e986a07f | 240 | bool TS_Point::operator!=(TS_Point p1) { |
JackB | 0:d146e986a07f | 241 | return ((p1.x != x) || (p1.y != y) || (p1.z != z)); |
JackB | 0:d146e986a07f | 242 | } |