FT5206 capacitive Touch Panel driver for 7 inch BuyDisplay LCD, with 5-point touch.
Diff: FT5206.h
- Revision:
- 0:19406ff51058
- Child:
- 1:56a53f203daa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FT5206.h Thu Jun 18 21:14:06 2015 +0000 @@ -0,0 +1,150 @@ +/** This is a library to handling capacitive multitouch sensors using FT5206. + * + * Originally written to work with 7-inch-lcd-module-capacitive-touch from BuyDisplay.com + * http://www.buydisplay.com/default/7-inch-lcd-module-capacitive-touch-screen-panel-i2c-spi-serial + * + * Example: + * @code + * // Use of the capacitive touch panel + * FT5206 FT5206(PIN_SDA_FT5206, PIN_SCL_FT5206, PIN_INT_FT5206); // sda, scl, int + * FT5206.init(); + * while(1) { + * if(FT5206.getPanelTouched()) { + * uint8_t numberOfTouchPoints = FT5206.getTouchPositions(); + * for (int i = 0; i < FT5206.numberOfTouchPoints; i++) { + * printf("Coord %d: %d, %d \r\n", i+1, FT5206.touchCoordinatesX[i], FT5206.touchCoordinatesY[i]); + * } + * } + * } + * @endcode + * + */ + +#ifndef FT5206_H +#define FT5206_H + +#include "mbed.h" + +#define DEBUG_OUTPUT_ENABLED false + +#define FT5206_I2C_FREQUENCY 400000 + +/* FT5206 definitions */ +#define FT5206_I2C_ADDRESS 0x38 +#define FT5206_NUMBER_OF_REGISTERS 31 // there are more registers, but this + // is enought to get all 5 touch coordinates. + +#define FT5206_NUMBER_OF_TOTAL_REGISTERS 0xFE + +#define FT5206_DEVICE_MODE 0x00 +#define FT5206_GEST_ID 0x01 +#define FT5206_TD_STATUS 0x02 // How many points detected (3:0). 1-5 is valid. + +#define FT5206_TOUCH1_XH 0x03 // Event Flag, Touch X Position +#define FT5206_TOUCH1_XL 0x04 +#define FT5206_TOUCH1_YH 0x05 // Touch ID, Touch Y Position +#define FT5206_TOUCH1_YL 0x06 + +#define FT5206_TOUCH2_XH 0x09 // Event Flag, Touch X Position +#define FT5206_TOUCH2_XL 0x0a +#define FT5206_TOUCH2_YH 0x0b // Touch ID, Touch Y Position +#define FT5206_TOUCH2_YL 0x0c + +#define FT5206_TOUCH3_XH 0x0f // Event Flag, Touch X Position +#define FT5206_TOUCH3_XL 0x10 +#define FT5206_TOUCH3_YH 0x11 // Touch ID, Touch Y Position +#define FT5206_TOUCH3_YL 0x12 + +#define FT5206_TOUCH4_XH 0x15 // Event Flag, Touch X Position +#define FT5206_TOUCH4_XL 0x16 +#define FT5206_TOUCH4_YH 0x17 // Touch ID, Touch Y Position +#define FT5206_TOUCH4_YL 0x18 + +#define FT5206_TOUCH5_XH 0x1b // Event Flag, Touch X Position +#define FT5206_TOUCH5_XL 0x1c +#define FT5206_TOUCH5_YH 0x1d // Touch ID, Touch Y Position +#define FT5206_TOUCH5_YL 0x1e + +#define FT5206_ID_G_THGROUP 0x80 // Valid touching detect threshold +#define FT5206_ID_G_THPEAK 0x81 // Valid touching peak detect threshold +#define FT5206_ID_G_THCAL 0x82 // The threshold when calculating the focus of touching +#define FT5206_ID_G_THWATER 0x83 // The threshold when there is surface water +#define FT5206_ID_G_THTEMP 0x84 // The threshold of temperature compensation +#define FT5206_ID_G_CTRL 0x86 // Power control mode +#define FT5206_ID_G_TIME_ENTER_MONITOR 0x87 // The timer of entering monitor status +#define FT5206_ID_G_PERIODACTIVE 0x88 // Period Active +#define FT5206_ID_G_PERIODMONITOR 0x89 // The timer of entering idle while in monitor status +#define FT5206_ID_G_AUTO_CLB_MODE 0xA0 // Auto calibration mode + +#define FT5206_TOUCH_LIB_VERSION_H 0xA1 // Firmware Library Version H byte +#define FT5206_TOUCH_LIB_VERSION_L 0xA2 // Firmware Library Version L byte +#define FT5206_ID_G_CIPHER 0xA3 // Chip vendor ID +#define FT5206_G_MODE 0xA4 // The interrupt status to host +#define FT5206_ID_G_PMODE 0xA5 // Power Consume Mode +#define FT5206_FIRMID 0xA6 // Firmware ID +#define FT5206_ID_G_STATE 0xA7 // Running State +#define FT5206_ID_G_FT5201ID 0xA8 // CTPM Vendor ID +#define FT5206_ID_G_ERR 0xA9 // Error Code +#define FT5206_ID_G_CLB 0xAA // Configure TP module during calibration in Test Mode +#define FT5206_ID_G_B_AREA_TH 0xAE // The threshold of big area +#define FT5206_LOG_MSG_CNT 0xFE // The log MSG count +#define FT5206_LOG_CUR_CHA 0xFF // Current character of log message, will point to the next + // character when one character is read. + +#define FT5206_GEST_ID_MOVE_UP 0x10 +#define FT5206_GEST_ID_MOVE_LEFT 0x14 +#define FT5206_GEST_ID_MOVE_DOWN 0x18 +#define FT5206_GEST_ID_MOVE_RIGHT 0x1c +#define FT5206_GEST_ID_ZOOM_IN 0x48 +#define FT5206_GEST_ID_ZOOM_OUT 0x49 +#define FT5206_GEST_ID_NO_GESTURE 0x00 + +#define FT5206_EVENT_FLAG_PUT_DOWN 0x00 +#define FT5206_EVENT_FLAG_PUT_UP 0x01 +#define FT5206_EVENT_FLAG_CONTACT 0x02 +#define FT5206_EVENT_FLAG_RESERVED 0x03 + +#define FT5206_ID_G_POLLING_MODE 0x00 +#define FT5206_ID_G_TRIGGER_MODE 0x01 + +#define FT5206_ID_G_PMODE_ACTIVE 0x00 +#define FT5206_ID_G_PMODE_MONITOR 0x01 +#define FT5206_ID_G_PMODE_HIBERNATE 0x03 + +#define FT5206_ID_G_STATE_CONFIGURE 0x00 +#define FT5206_ID_G_STATE_WORK 0x01 +#define FT5206_ID_G_STATE_CALIBRATION 0x02 +#define FT5206_ID_G_STATE_FACTORY 0x03 +#define FT5206_ID_G_STATE_AUTO_CALIBRATION 0x04 + +class FT5206 +{ +public: + FT5206(PinName sda, PinName scl, PinName interrupt); + + bool init(); + + uint8_t getTouchPositions(void); + void init(void); + void intPanelTouched(void); + bool getPanelTouched(void); + + uint8_t numberOfTouchPoints; + uint16_t touchCoordinatesX[5]; + uint16_t touchCoordinatesY[5]; + +private: + InterruptIn m_interrupt; + + I2C m_i2c; + int m_addr; + char data[2]; + + bool debug_output_enabled; + bool panelTouched; + void writeRegister8(char reg, char val); + char readRegister8(char reg); + +}; + +#endif