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touch driver: Add LVGL v8 compatibility

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C47D 2021-06-13 15:06:22 -05:00
parent f726311525
commit 0d32432f4c
4 changed files with 275 additions and 0 deletions
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168
lvgl_touch/gt911.c Normal file
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@ -0,0 +1,168 @@
/*
* Copyright © 2021 Sturnus Inc.
* Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the “Software”), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <esp_log.h>
#include <driver/i2c.h>
#ifdef LV_LVGL_H_INCLUDE_SIMPLE
#include <lvgl.h>
#else
#include <lvgl/lvgl.h>
#endif
#include "gt911.h"
#include "tp_i2c.h"
#include "../lvgl_i2c_conf.h"
#define TAG "GT911"
gt911_status_t gt911_status;
//TODO: handle multibyte read and refactor to just one read transaction
esp_err_t gt911_i2c_read(uint8_t slave_addr, uint16_t register_addr, uint8_t *data_buf, uint8_t len) {
i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
i2c_master_start(i2c_cmd);
i2c_master_write_byte(i2c_cmd, (slave_addr << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd, (register_addr >> 8), I2C_MASTER_ACK);
i2c_master_write_byte(i2c_cmd, (register_addr & 0xFF), I2C_MASTER_ACK);
i2c_master_start(i2c_cmd);
i2c_master_write_byte(i2c_cmd, (slave_addr << 1) | I2C_MASTER_READ, true);
i2c_master_read_byte(i2c_cmd, data_buf, I2C_MASTER_NACK);
i2c_master_stop(i2c_cmd);
esp_err_t ret = i2c_master_cmd_begin(TOUCH_I2C_PORT, i2c_cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(i2c_cmd);
return ret;
}
esp_err_t gt911_i2c_write8(uint8_t slave_addr, uint16_t register_addr, uint8_t data) {
i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
i2c_master_start(i2c_cmd);
i2c_master_write_byte(i2c_cmd, (slave_addr << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd, (register_addr >> 8), I2C_MASTER_ACK);
i2c_master_write_byte(i2c_cmd, (register_addr & 0xFF), I2C_MASTER_ACK);
i2c_master_write_byte(i2c_cmd, data, I2C_MASTER_ACK);
i2c_master_stop(i2c_cmd);
esp_err_t ret = i2c_master_cmd_begin(TOUCH_I2C_PORT, i2c_cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(i2c_cmd);
return ret;
}
/**
* @brief Initialize for GT911 communication via I2C
* @param dev_addr: Device address on communication Bus (I2C slave address of GT911).
* @retval None
*/
void gt911_init(uint8_t dev_addr) {
if (!gt911_status.inited) {
gt911_status.i2c_dev_addr = dev_addr;
uint8_t data_buf;
esp_err_t ret;
ESP_LOGI(TAG, "Checking for GT911 Touch Controller");
if ((ret = gt911_i2c_read(dev_addr, GT911_PRODUCT_ID1, &data_buf, 1) != ESP_OK)) {
ESP_LOGE(TAG, "Error reading from device: %s",
esp_err_to_name(ret)); // Only show error the first time
return;
}
// Read 4 bytes for Product ID in ASCII
for (int i = 0; i < GT911_PRODUCT_ID_LEN; i++) {
gt911_i2c_read(dev_addr, (GT911_PRODUCT_ID1 + i), (uint8_t *)&(gt911_status.product_id[i]), 1);
}
ESP_LOGI(TAG, "\tProduct ID: %s", gt911_status.product_id);
gt911_i2c_read(dev_addr, GT911_VENDOR_ID, &data_buf, 1);
ESP_LOGI(TAG, "\tVendor ID: 0x%02x", data_buf);
gt911_i2c_read(dev_addr, GT911_X_COORD_RES_L, &data_buf, 1);
gt911_status.max_x_coord = data_buf;
gt911_i2c_read(dev_addr, GT911_X_COORD_RES_H, &data_buf, 1);
gt911_status.max_x_coord |= ((uint16_t)data_buf << 8);
ESP_LOGI(TAG, "\tX Resolution: %d", gt911_status.max_x_coord);
gt911_i2c_read(dev_addr, GT911_Y_COORD_RES_L, &data_buf, 1);
gt911_status.max_y_coord = data_buf;
gt911_i2c_read(dev_addr, GT911_Y_COORD_RES_H, &data_buf, 1);
gt911_status.max_y_coord |= ((uint16_t)data_buf << 8);
ESP_LOGI(TAG, "\tY Resolution: %d", gt911_status.max_y_coord);
gt911_status.inited = true;
}
}
/**
* @brief Get the touch screen X and Y positions values. Ignores multi touch
* @param drv:
* @param data: Store data here
* @retval Always false
*/
bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
uint8_t touch_pnt_cnt; // Number of detected touch points
static int16_t last_x = 0; // 12bit pixel value
static int16_t last_y = 0; // 12bit pixel value
uint8_t data_buf;
uint8_t status_reg;
gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_STATUS_REG, &status_reg, 1);
// ESP_LOGI(TAG, "\tstatus: 0x%02x", status_reg);
touch_pnt_cnt = status_reg & 0x0F;
if ((status_reg & 0x80) || (touch_pnt_cnt < 6)) {
//Reset Status Reg Value
gt911_i2c_write8(gt911_status.i2c_dev_addr, GT911_STATUS_REG, 0x00);
}
if (touch_pnt_cnt != 1) { // ignore no touch & multi touch
data->point.x = last_x;
data->point.y = last_y;
data->state = LV_INDEV_STATE_REL;
return false;
}
// gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_TRACK_ID1, &data_buf, 1);
// ESP_LOGI(TAG, "\ttrack_id: %d", data_buf);
gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_PT1_X_COORD_L, &data_buf, 1);
last_x = data_buf;
gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_PT1_X_COORD_H, &data_buf, 1);
last_x |= ((uint16_t)data_buf << 8);
gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_PT1_Y_COORD_L, &data_buf, 1);
last_y = data_buf;
gt911_i2c_read(gt911_status.i2c_dev_addr, GT911_PT1_Y_COORD_H, &data_buf, 1);
last_y |= ((uint16_t)data_buf << 8);
#if CONFIG_LV_GT911_INVERT_X
last_x = gt911_status.max_x_coord - last_x;
#endif
#if CONFIG_LV_GT911_INVERT_Y
last_y = gt911_status.max_y_coord - last_y;
#endif
#if CONFIG_LV_GT911_SWAPXY
int16_t swap_buf = last_x;
last_x = last_y;
last_y = swap_buf;
#endif
data->point.x = last_x;
data->point.y = last_y;
data->state = LV_INDEV_STATE_PR;
ESP_LOGI(TAG, "X=%u Y=%u", data->point.x, data->point.y);
ESP_LOGV(TAG, "X=%u Y=%u", data->point.x, data->point.y);
return false;
}

94
lvgl_touch/gt911.h Normal file
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@ -0,0 +1,94 @@
#ifndef __GT911_H
/*
* Copyright © 2021 Sturnus Inc.
* Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the “Software”), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define __GT911_H
#include <stdint.h>
#include <stdbool.h>
#ifdef LV_LVGL_H_INCLUDE_SIMPLE
#include "lvgl.h"
#else
#include "lvgl/lvgl.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define GT911_I2C_SLAVE_ADDR 0x5D
#define GT911_PRODUCT_ID_LEN 4
/* Register Map of GT911 */
#define GT911_PRODUCT_ID1 0x8140
#define GT911_PRODUCT_ID2 0x8141
#define GT911_PRODUCT_ID3 0x8142
#define GT911_PRODUCT_ID4 0x8143
#define GT911_FIRMWARE_VER_L 0x8144
#define GT911_FIRMWARE_VER_H 0x8145
#define GT911_X_COORD_RES_L 0x8146
#define GT911_X_COORD_RES_H 0x8147
#define GT911_Y_COORD_RES_L 0x8148
#define GT911_Y_COORD_RES_H 0x8149
#define GT911_VENDOR_ID 0x814A
#define GT911_STATUS_REG 0x814E
#define GT911_STATUS_REG_BUF 0x80
#define GT911_STATUS_REG_LARGE 0x40
#define GT911_STATUS_REG_PROX_VALID 0x20
#define GT911_STATUS_REG_HAVEKEY 0x10
#define GT911_STATUS_REG_PT_MASK 0x0F
#define GT911_TRACK_ID1 0x814F
#define GT911_PT1_X_COORD_L 0x8150
#define GT911_PT1_X_COORD_H 0x8151
#define GT911_PT1_Y_COORD_L 0x8152
#define GT911_PT1_Y_COORD_H 0x8153
#define GT911_PT1_X_SIZE_L 0x8154
#define GT911_PT1_X_SIZE_H 0x8155
typedef struct {
bool inited;
char product_id[GT911_PRODUCT_ID_LEN];
uint16_t max_x_coord;
uint16_t max_y_coord;
uint8_t i2c_dev_addr;
} gt911_status_t;
/**
* @brief Initialize for GT911 communication via I2C
* @param dev_addr: Device address on communication Bus (I2C slave address of GT911).
* @retval None
*/
void gt911_init(uint8_t dev_addr);
/**
* @brief Get the touch screen X and Y positions values. Ignores multi touch
* @param drv:
* @param data: Store data here
* @retval Always false
*/
bool gt911_read(lv_indev_drv_t *drv, lv_indev_data_t *data);
#ifdef __cplusplus
}
#endif
#endif /* __GT911_H */

8
lvgl_touch/touch_driver.c
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@ -26,7 +26,11 @@ void touch_driver_init(void)
#endif
}
#if LVGL_VERSION_MAJOR >= 8
void touch_driver_read(lv_indev_drv_t *drv, lv_indev_data_t *data)
#else
bool touch_driver_read(lv_indev_drv_t *drv, lv_indev_data_t *data)
#endif
{
bool res = false;
@ -46,6 +50,10 @@ bool touch_driver_read(lv_indev_drv_t *drv, lv_indev_data_t *data)
res = gt911_read(drv, data);
#endif
#if LVGL_VERSION_MAJOR >= 8
data->continue_reading = res;
#else
return res;
#endif
}

5
lvgl_touch/touch_driver.h
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@ -44,7 +44,12 @@ extern "C" {
* GLOBAL PROTOTYPES
**********************/
void touch_driver_init(void);
#if LVGL_VERSION_MAJOR >= 8
void touch_driver_read(lv_indev_drv_t *drv, lv_indev_data_t *data);
#else
bool touch_driver_read(lv_indev_drv_t *drv, lv_indev_data_t *data);
#endif
#ifdef __cplusplus
} /* extern "C" */