95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
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#ifndef __GT911_H
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/*
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* Copyright © 2021 Sturnus Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this
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* software and associated documentation files (the “Software”), to deal in the Software
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* without restriction, including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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* to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#define __GT911_H
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef LV_LVGL_H_INCLUDE_SIMPLE
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#include "lvgl.h"
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#else
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#include "lvgl/lvgl.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define GT911_I2C_SLAVE_ADDR 0x5D
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#define GT911_PRODUCT_ID_LEN 4
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/* Register Map of GT911 */
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#define GT911_PRODUCT_ID1 0x8140
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#define GT911_PRODUCT_ID2 0x8141
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#define GT911_PRODUCT_ID3 0x8142
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#define GT911_PRODUCT_ID4 0x8143
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#define GT911_FIRMWARE_VER_L 0x8144
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#define GT911_FIRMWARE_VER_H 0x8145
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#define GT911_X_COORD_RES_L 0x8146
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#define GT911_X_COORD_RES_H 0x8147
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#define GT911_Y_COORD_RES_L 0x8148
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#define GT911_Y_COORD_RES_H 0x8149
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#define GT911_VENDOR_ID 0x814A
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#define GT911_STATUS_REG 0x814E
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#define GT911_STATUS_REG_BUF 0x80
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#define GT911_STATUS_REG_LARGE 0x40
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#define GT911_STATUS_REG_PROX_VALID 0x20
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#define GT911_STATUS_REG_HAVEKEY 0x10
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#define GT911_STATUS_REG_PT_MASK 0x0F
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#define GT911_TRACK_ID1 0x814F
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#define GT911_PT1_X_COORD_L 0x8150
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#define GT911_PT1_X_COORD_H 0x8151
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#define GT911_PT1_Y_COORD_L 0x8152
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#define GT911_PT1_Y_COORD_H 0x8153
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#define GT911_PT1_X_SIZE_L 0x8154
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#define GT911_PT1_X_SIZE_H 0x8155
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typedef struct {
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bool inited;
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char product_id[GT911_PRODUCT_ID_LEN];
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uint16_t max_x_coord;
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uint16_t max_y_coord;
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uint8_t i2c_dev_addr;
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} gt911_status_t;
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/**
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* @brief Initialize for GT911 communication via I2C
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* @param dev_addr: Device address on communication Bus (I2C slave address of GT911).
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* @retval None
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*/
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void gt911_init(uint8_t dev_addr);
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/**
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* @brief Get the touch screen X and Y positions values. Ignores multi touch
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* @param drv:
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* @param data: Store data here
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* @retval Always false
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*/
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bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __GT911_H */
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