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managed_components/espressif__esp_lcd_touch_gt1151/.component_hash Normal file
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69dd86cd5fad2442e3bf15c8c4ddddbe9e8739bdb26cd5f2c5249601b4c3cc38

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{"version": "1.0", "algorithm": "sha256", "created_at": "2025-05-21T17:00:11.770452+00:00", "files": [{"path": "CMakeLists.txt", "size": 96, "hash": "a75514fac48444bb945f4f725cefe5d9df2bec2b4a757408fc2681df73c2b5d0"}, {"path": "idf_component.yml", "size": 431, "hash": "597674f3210dd5ce7a0a891ef0e019343d52e14ff7fee0c8e96debf38dded14b"}, {"path": "README.md", "size": 2103, "hash": "7afaf30d617dd51478b9146699240dc8aebbf524dd55e318a2b13e0d18471424"}, {"path": "license.txt", "size": 11358, "hash": "cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30"}, {"path": "esp_lcd_touch_gt1151.c", "size": 8599, "hash": "f939ffea8031e4e2495695be35734c68fb53c389512bf087e20a09cb7d1b3a78"}, {"path": "include/esp_lcd_touch_gt1151.h", "size": 1525, "hash": "aea512cf54fb65e19eb408bfe3ec21e689be2f3e001eb7dfd73b7ba67cbd163a"}]}

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idf_component_register(SRCS "esp_lcd_touch_gt1151.c" INCLUDE_DIRS "include" REQUIRES "esp_lcd")

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# ESP LCD Touch GT1151 Controller
[![Component Registry](https://components.espressif.com/components/espressif/esp_lcd_touch_gt1151/badge.svg)](https://components.espressif.com/components/espressif/esp_lcd_touch_gt1151)
Implementation of the GT1151 touch controller with esp_lcd_touch component.
| Touch controller | Communication interface | Component name | Link to datasheet |
| :--------------: | :---------------------: | :------------: | :---------------: |
| GT1151 | I2C | esp_lcd_touch_gt1151 | [datasheet](https://datasheetspdf.com/pdf-file/954783/GOODIX/GT1151/1) |
## Add to project
Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
You can add them to your project via `idf.py add-dependancy`, e.g.
```
idf.py add-dependency esp_lcd_touch_gt1151==1.0.0
```
Alternatively, you can create `idf_component.yml`. More is in [Espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
## Example use
Initialization of the touch component.
```
esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT1151_CONFIG();
esp_lcd_touch_config_t tp_cfg = {
.x_max = CONFIG_LCD_HRES,
.y_max = CONFIG_LCD_VRES,
.rst_gpio_num = -1,
.int_gpio_num = -1,
.levels = {
.reset = 0,
.interrupt = 0,
},
.flags = {
.swap_xy = 0,
.mirror_x = 0,
.mirror_y = 0,
},
};
esp_lcd_touch_handle_t tp;
esp_lcd_touch_new_i2c_gt1151(io_handle, &tp_cfg, &tp);
```
Read data from the touch controller and store it in RAM memory. It should be called regularly in poll.
```
esp_lcd_touch_read_data(tp);
```
Get one X and Y coordinates with strength of touch.
```
uint16_t touch_x[1];
uint16_t touch_y[1];
uint16_t touch_strength[1];
uint8_t touch_cnt = 0;
bool touchpad_pressed = esp_lcd_touch_get_coordinates(tp, touch_x, touch_y, touch_strength, &touch_cnt, 1);
```

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/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_system.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_check.h"
#include "esp_lcd_panel_io.h"
#include "esp_lcd_touch.h"
static const char *TAG = "gt1151";
#define READ_XY_REG (0x814E)
#define PRODUCT_ID_REG (0x8140)
#define MAX_TOUCH_NUM (10)
/* Buffer Length = StatusReg(1) + TouchData(8 * TouchNum) + KeyValue(1) + Checksum(1) */
#define DATA_BUFF_LEN(touch_num) (1 + 8 * (touch_num) + 2)
#define IS_NUM_OR_CHAR(x) (((x) >= 'A' && (x) <= 'Z') || ((x) >= '0' && (x) <= '9'))
static esp_err_t read_data(esp_lcd_touch_handle_t tp);
static bool get_xy(esp_lcd_touch_handle_t tp, uint16_t *x, uint16_t *y, uint16_t *strength, uint8_t *point_num, uint8_t max_point_num);
static esp_err_t del(esp_lcd_touch_handle_t tp);
static esp_err_t i2c_read_bytes(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t *data, uint8_t len);
static esp_err_t i2c_write_byte(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t data);
static esp_err_t reset(esp_lcd_touch_handle_t tp);
static esp_err_t read_product_id(esp_lcd_touch_handle_t tp);
esp_err_t esp_lcd_touch_new_i2c_gt1151(const esp_lcd_panel_io_handle_t io, const esp_lcd_touch_config_t *config, esp_lcd_touch_handle_t *tp)
{
ESP_RETURN_ON_FALSE(io, ESP_ERR_INVALID_ARG, TAG, "Invalid io");
ESP_RETURN_ON_FALSE(config, ESP_ERR_INVALID_ARG, TAG, "Invalid config");
ESP_RETURN_ON_FALSE(tp, ESP_ERR_INVALID_ARG, TAG, "Invalid touch handle");
/* Prepare main structure */
esp_err_t ret = ESP_OK;
esp_lcd_touch_handle_t gt1151 = calloc(1, sizeof(esp_lcd_touch_t));
ESP_GOTO_ON_FALSE(gt1151, ESP_ERR_NO_MEM, err, TAG, "Touch handle malloc failed");
/* Communication interface */
gt1151->io = io;
/* Only supported callbacks are set */
gt1151->read_data = read_data;
gt1151->get_xy = get_xy;
gt1151->del = del;
/* Mutex */
gt1151->data.lock.owner = portMUX_FREE_VAL;
/* Save config */
memcpy(&gt1151->config, config, sizeof(esp_lcd_touch_config_t));
/* Prepare pin for touch interrupt */
if (gt1151->config.int_gpio_num != GPIO_NUM_NC) {
const gpio_config_t int_gpio_config = {
.mode = GPIO_MODE_INPUT,
.intr_type = (gt1151->config.levels.interrupt ? GPIO_INTR_POSEDGE : GPIO_INTR_NEGEDGE),
.pin_bit_mask = BIT64(gt1151->config.int_gpio_num)
};
ESP_GOTO_ON_ERROR(gpio_config(&int_gpio_config), err, TAG, "GPIO intr config failed");
/* Register interrupt callback */
if (gt1151->config.interrupt_callback) {
esp_lcd_touch_register_interrupt_callback(gt1151, gt1151->config.interrupt_callback);
}
}
/* Prepare pin for touch controller reset */
if (gt1151->config.rst_gpio_num != GPIO_NUM_NC) {
const gpio_config_t rst_gpio_config = {
.mode = GPIO_MODE_OUTPUT,
.pin_bit_mask = BIT64(gt1151->config.rst_gpio_num)
};
ESP_GOTO_ON_ERROR(gpio_config(&rst_gpio_config), err, TAG, "GPIO reset config failed");
}
/* Reset controller */
ESP_GOTO_ON_ERROR(reset(gt1151), err, TAG, "Reset failed");
/* Read product id */
ESP_GOTO_ON_ERROR(read_product_id(gt1151), err, TAG, "Read product id failed");
*tp = gt1151;
return ESP_OK;
err:
if (gt1151) {
del(gt1151);
}
ESP_LOGE(TAG, "Initialization failed!");
return ret;
}
static esp_err_t read_data(esp_lcd_touch_handle_t tp)
{
typedef struct {
uint8_t touch_id : 4;
uint8_t : 4;
uint16_t x;
uint16_t y;
uint16_t strength;
uint8_t useless;
} __attribute__((packed)) touch_record_t;
typedef struct {
uint8_t touch_cnt : 4;
uint8_t : 4;
touch_record_t touch_record[0];
} __attribute__((packed)) touch_report_t;
uint8_t touch_cnt;
ESP_RETURN_ON_ERROR(i2c_read_bytes(tp, READ_XY_REG, &touch_cnt, sizeof(touch_cnt)), TAG, "I2C read failed!");
touch_cnt &= 0x0f;
/* Any touch data? */
if (touch_cnt > MAX_TOUCH_NUM || touch_cnt == 0) {
i2c_write_byte(tp, READ_XY_REG, 0);
return ESP_OK;
}
uint8_t buf[DATA_BUFF_LEN(MAX_TOUCH_NUM)];
/* Read all points */
ESP_RETURN_ON_ERROR( i2c_read_bytes(tp, READ_XY_REG, buf, DATA_BUFF_LEN(touch_cnt)), TAG, "I2C read failed");
/* Clear all */
i2c_write_byte(tp, READ_XY_REG, 0);
/* Caculate checksum */
uint8_t checksum = 0;
for (int i = 0; i < DATA_BUFF_LEN(touch_cnt); i++) {
checksum += buf[i];
}
ESP_RETURN_ON_FALSE(!checksum, ESP_ERR_INVALID_CRC, TAG, "Checksum error");
touch_report_t *touch_report = (touch_report_t *)buf;
portENTER_CRITICAL(&tp->data.lock);
/* Expect Number of touched points */
touch_cnt = (touch_cnt > CONFIG_ESP_LCD_TOUCH_MAX_POINTS ? CONFIG_ESP_LCD_TOUCH_MAX_POINTS : touch_cnt);
tp->data.points = touch_cnt;
/* Fill all coordinates */
for (int i = 0; i < touch_cnt; i++) {
tp->data.coords[i].x = touch_report->touch_record[i].x;
tp->data.coords[i].y = touch_report->touch_record[i].y;
tp->data.coords[i].strength = touch_report->touch_record[i].strength;
}
portEXIT_CRITICAL(&tp->data.lock);
return ESP_OK;
}
static bool get_xy(esp_lcd_touch_handle_t tp, uint16_t *x, uint16_t *y, uint16_t *strength, uint8_t *point_num, uint8_t max_point_num)
{
portENTER_CRITICAL(&tp->data.lock);
/* Count of points */
*point_num = (tp->data.points > max_point_num ? max_point_num : tp->data.points);
for (size_t i = 0; i < *point_num; i++) {
x[i] = tp->data.coords[i].x;
y[i] = tp->data.coords[i].y;
if (strength) {
strength[i] = tp->data.coords[i].strength;
}
}
/* Invalidate */
tp->data.points = 0;
portEXIT_CRITICAL(&tp->data.lock);
return (*point_num > 0);
}
static esp_err_t del(esp_lcd_touch_handle_t tp)
{
/* Reset GPIO pin settings */
if (tp->config.int_gpio_num != GPIO_NUM_NC) {
gpio_reset_pin(tp->config.int_gpio_num);
if (tp->config.interrupt_callback) {
gpio_isr_handler_remove(tp->config.int_gpio_num);
}
}
if (tp->config.rst_gpio_num != GPIO_NUM_NC) {
gpio_reset_pin(tp->config.rst_gpio_num);
}
/* Release memory */
free(tp);
return ESP_OK;
}
static esp_err_t reset(esp_lcd_touch_handle_t tp)
{
if (tp->config.rst_gpio_num != GPIO_NUM_NC) {
ESP_RETURN_ON_ERROR(gpio_set_level(tp->config.rst_gpio_num, tp->config.levels.reset), TAG, "GPIO set level failed");
vTaskDelay(pdMS_TO_TICKS(10));
ESP_RETURN_ON_ERROR(gpio_set_level(tp->config.rst_gpio_num, !tp->config.levels.reset), TAG, "GPIO set level failed");
vTaskDelay(pdMS_TO_TICKS(10));
}
return ESP_OK;
}
static esp_err_t read_product_id(esp_lcd_touch_handle_t tp)
{
uint8_t buf[11] = {0};
uint8_t checksum = 0;
ESP_RETURN_ON_ERROR(i2c_read_bytes(tp, PRODUCT_ID_REG, buf, sizeof(buf)), TAG, "I2C read failed");
for (int i = 0; i < sizeof(buf); i++) {
checksum += buf[i];
}
/* First 3 bytes must be number or char, and sensor id != 0xFF */
ESP_RETURN_ON_FALSE(checksum, ESP_ERR_INVALID_CRC, TAG, "Checksum error");
ESP_RETURN_ON_FALSE(
IS_NUM_OR_CHAR(buf[0]) && IS_NUM_OR_CHAR(buf[1]) && IS_NUM_OR_CHAR(buf[2]) && buf[10] != 0xFF,
ESP_ERR_INVALID_CRC, TAG, "Product id format error");
uint32_t mask_id, patch_id, sensor_id;
char product_id[5] = {0};
mask_id = (uint32_t) ((buf[7] << 16) | (buf[8] << 8) | buf[9]);
patch_id = (uint32_t) ((buf[4] << 16) | (buf[5] << 8) | buf[6]);
memcpy(product_id, buf, 4);
sensor_id = buf[10] & 0x0F;
ESP_LOGI(
TAG, "IC version: GT%s_%06" PRIX32 "(Patch)_%04" PRIX32 "(Mask)_%02" PRIX32 "(SensorID)",
product_id, patch_id, mask_id >> 8, sensor_id);
return ESP_OK;
}
static esp_err_t i2c_read_bytes(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t *data, uint8_t len)
{
ESP_RETURN_ON_FALSE(data, ESP_ERR_INVALID_ARG, TAG, "Invalid data");
return esp_lcd_panel_io_rx_param(tp->io, reg, data, len);
}
static esp_err_t i2c_write_byte(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t data)
{
// *INDENT-OFF*
return esp_lcd_panel_io_tx_param(tp->io, reg, (uint8_t[]){data}, 1);
// *INDENT-ON*
}

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managed_components/espressif__esp_lcd_touch_gt1151/idf_component.yml Normal file
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dependencies:
esp_lcd_touch:
public: true
version: ^1.0.4
idf: '>=4.4.2'
description: ESP LCD Touch GT1151 - touch controller GT1151
repository: git://github.com/espressif/esp-bsp.git
repository_info:
commit_sha: 30d2504a679c1cb0d10833f772d97453098b4c08
path: components/lcd_touch/esp_lcd_touch_gt1151
url: https://github.com/espressif/esp-bsp/tree/master/components/lcd_touch/esp_lcd_touch_gt1151
version: 1.0.5~2

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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief ESP LCD touch: GT1151
*/
#pragma once
#include "esp_lcd_touch.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a new GT1151 touch driver
*
* @note The I2C communication should be initialized before use this function.
*
* @param io LCD panel IO handle, it should be created by `esp_lcd_new_panel_io_i2c()`
* @param config Touch panel configuration
* @param tp Touch panel handle
* @return
* - ESP_OK: on success
*/
esp_err_t esp_lcd_touch_new_i2c_gt1151(const esp_lcd_panel_io_handle_t io, const esp_lcd_touch_config_t *config, esp_lcd_touch_handle_t *tp);
/**
* @brief I2C address of the GT1151 controller
*
*/
#define ESP_LCD_TOUCH_IO_I2C_GT1151_ADDRESS (0x14)
/**
* @brief Touch IO configuration structure
*
*/
#define ESP_LCD_TOUCH_IO_I2C_GT1151_CONFIG() \
{ \
.dev_addr = ESP_LCD_TOUCH_IO_I2C_GT1151_ADDRESS, \
.control_phase_bytes = 1, \
.dc_bit_offset = 0, \
.lcd_cmd_bits = 16, \
.flags = \
{ \
.disable_control_phase = 1, \
} \
}
#ifdef __cplusplus
}
#endif

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