add some code
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{"version": "1.0", "algorithm": "sha256", "created_at": "2025-07-15T10:57:47.123029+00:00", "files": [{"path": "CMakeLists.txt", "size": 97, "hash": "d4040e28d59a678c38fb13f6ff29881cb38f9d2fac05fd4b8aed03217a5c7c8c"}, {"path": "Kconfig", "size": 264, "hash": "761b9f2ac330cba6f0c20e468fccf9b9102ad6850662ae1ca275a96e8618614f"}, {"path": "README.md", "size": 3649, "hash": "5148d990b8ae99f98c658f11c78ce45895d4ff15ea36215a54fd82f4bab124f9"}, {"path": "esp_lcd_touch_cst816s.c", "size": 6287, "hash": "01b3594c722b1fe6f05d254b081d6a4e8014d56b0f0e06c58d298d4fa882ce0c"}, {"path": "idf_component.yml", "size": 310, "hash": "db2bba3e94b118082f0dbcef98a8d29acef18a93d24c4a414661679ab5e0c431"}, {"path": "license.txt", "size": 11358, "hash": "cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30"}, {"path": "include/esp_lcd_touch_cst816s.h", "size": 2783, "hash": "04963086236fcd655e8181a98cfa30a9aabf1b5ae6ad6917c7b91f8dcf819857"}, {"path": "test_apps/CMakeLists.txt", "size": 323, "hash": "b9ab8ef50938023920a2c970fa71ca85db6a15f7929007f7f10a84402ceee2b8"}, {"path": "test_apps/sdkconfig.defaults", "size": 49, "hash": "dccb276c3ef85f8f4d6c32edf7c8b582cf2d416f42950b778d7af95a9808e7d4"}, {"path": "test_apps/main/CMakeLists.txt", "size": 60, "hash": "f593b1ac477df2a76bb8c338660adcbd45e1f0f7e0bd8ddc135a566e39d1f62d"}, {"path": "test_apps/main/idf_component.yml", "size": 162, "hash": "ef2ce20977812a320b63bf45f407c4d8b24a679f92adb85fd4db574ef115995b"}, {"path": "test_apps/main/test_esp_lcd_touch_cst816s.c", "size": 2080, "hash": "040124f0040988334ae7d40709c3747304e1538d3f8a8e48cbf45cc8121d2be1"}]}
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idf_component_register(SRCS "esp_lcd_touch_cst816s.c" INCLUDE_DIRS "include" REQUIRES "esp_lcd")
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menu "ESP LCD TOUCH - CST816S"
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config ESP_LCD_TOUCH_CST816S_DISABLE_READ_ID
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bool "Disable reading ID during initialization"
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default n
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help
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For some CST816 series chips, reading ID may cause initialization failure.
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endmenu
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# ESP LCD Touch CST816S Controller
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[](https://components.espressif.com/components/espressif/esp_lcd_touch_cst816s)
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Implementation of the CST816S touch controller with esp_lcd_touch component.
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| Touch controller | Communication interface | Component name | Link to datasheet |
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| :--------------: | :---------------------: | :-------------------: | :------------------------------------------------------------------------: |
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| CST816S | I2C | esp_lcd_touch_cst816s | [datasheet](https://www.buydisplay.com/download/ic/DS-CST816S_DS_V1.3.pdf) |
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> [!NOTE]
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> * There are two things about the driver are noteworthy (from [document](https://doc.riot-os.org/group__drivers__cst816s.html)):
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> * It only responds to I2C commands after an event, such as a touch detection. Do not expect it to respond on init. Instead after a touch event, it will assert the IRQ and respond to I2C reads for a short time.
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> * While it should be able to detect multiple finger events, this version of the chip always returns only a single finger event and a gesture. Reading the display data multiple times during a single event will return the last sampled finger position.
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> * For some chips, reading ID may cause initialization failure. Disable reading ID by setting `CONFIG_ESP_LCD_TOUCH_CST816S_DISABLE_READ_ID` to `y` in `menuconfig`.
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## Add to project
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Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
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You can add them to your project via `idf.py add-dependancy`, e.g.
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```
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idf.py add-dependency esp_lcd_touch_cst816s==1.0.0
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```
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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).
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## Example use
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Define a mutex for the touch and create it before initialize the touch:
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```
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static SemaphoreHandle_t touch_mux;
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touch_mux = xSemaphoreCreateBinary();
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```
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Define a callback function used by ISR:
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```
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static void touch_callback(esp_lcd_touch_handle_t tp)
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{
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BaseType_t xHigherPriorityTaskWoken = pdFALSE;
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xSemaphoreGiveFromISR(touch_mux, &xHigherPriorityTaskWoken);
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if (xHigherPriorityTaskWoken) {
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portYIELD_FROM_ISR();
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}
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}
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```
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Initialization of the touch component.
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```
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esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG();
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esp_lcd_touch_config_t tp_cfg = {
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.x_max = CONFIG_LCD_HRES,
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.y_max = CONFIG_LCD_VRES,
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.rst_gpio_num = CONFIG_LCD_TOUCH_RST,
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.int_gpio_num = CONFIG_LCD_TOUCH_INT,
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.levels = {
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.reset = 0,
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.interrupt = 0,
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},
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.flags = {
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.swap_xy = 0,
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.mirror_x = 0,
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.mirror_y = 0,
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},
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.interrupt_callback = touch_callback,
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};
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esp_lcd_touch_handle_t tp;
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esp_lcd_touch_new_i2c_cst816s(io_handle, &tp_cfg, &tp);
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```
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Read data from the touch controller and store it in RAM memory. It should be called regularly in poll.
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```
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if (xSemaphoreTake(touch_mux, 0) == pdTRUE) {
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esp_lcd_touch_read_data(tp); // read only when ISR was triggled
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}
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```
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Get one X and Y coordinates with strength of touch.
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```
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uint16_t touch_x[1];
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uint16_t touch_y[1];
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uint16_t touch_strength[1];
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uint8_t touch_cnt = 0;
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bool touchpad_pressed = esp_lcd_touch_get_coordinates(tp, touch_x, touch_y, touch_strength, &touch_cnt, 1);
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```
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/*
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* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/gpio.h"
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#include "esp_system.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "esp_check.h"
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#include "esp_lcd_panel_io.h"
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#include "esp_lcd_touch.h"
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#define POINT_NUM_MAX (1)
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#define DATA_START_REG (0x02)
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#define CHIP_ID_REG (0xA7)
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static const char *TAG = "CST816S";
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static esp_err_t read_data(esp_lcd_touch_handle_t tp);
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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);
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static esp_err_t del(esp_lcd_touch_handle_t tp);
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static esp_err_t i2c_read_bytes(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t *data, uint8_t len);
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static esp_err_t reset(esp_lcd_touch_handle_t tp);
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static esp_err_t read_id(esp_lcd_touch_handle_t tp);
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esp_err_t esp_lcd_touch_new_i2c_cst816s(const esp_lcd_panel_io_handle_t io, const esp_lcd_touch_config_t *config, esp_lcd_touch_handle_t *tp)
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{
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ESP_RETURN_ON_FALSE(io, ESP_ERR_INVALID_ARG, TAG, "Invalid io");
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ESP_RETURN_ON_FALSE(config, ESP_ERR_INVALID_ARG, TAG, "Invalid config");
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ESP_RETURN_ON_FALSE(tp, ESP_ERR_INVALID_ARG, TAG, "Invalid touch handle");
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/* Prepare main structure */
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esp_err_t ret = ESP_OK;
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esp_lcd_touch_handle_t cst816s = calloc(1, sizeof(esp_lcd_touch_t));
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ESP_GOTO_ON_FALSE(cst816s, ESP_ERR_NO_MEM, err, TAG, "Touch handle malloc failed");
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/* Communication interface */
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cst816s->io = io;
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/* Only supported callbacks are set */
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cst816s->read_data = read_data;
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cst816s->get_xy = get_xy;
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cst816s->del = del;
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/* Mutex */
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cst816s->data.lock.owner = portMUX_FREE_VAL;
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/* Save config */
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memcpy(&cst816s->config, config, sizeof(esp_lcd_touch_config_t));
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/* Prepare pin for touch interrupt */
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if (cst816s->config.int_gpio_num != GPIO_NUM_NC) {
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const gpio_config_t int_gpio_config = {
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.mode = GPIO_MODE_INPUT,
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.intr_type = (cst816s->config.levels.interrupt ? GPIO_INTR_POSEDGE : GPIO_INTR_NEGEDGE),
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.pin_bit_mask = BIT64(cst816s->config.int_gpio_num)
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};
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ESP_GOTO_ON_ERROR(gpio_config(&int_gpio_config), err, TAG, "GPIO intr config failed");
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/* Register interrupt callback */
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if (cst816s->config.interrupt_callback) {
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esp_lcd_touch_register_interrupt_callback(cst816s, cst816s->config.interrupt_callback);
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}
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}
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/* Prepare pin for touch controller reset */
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if (cst816s->config.rst_gpio_num != GPIO_NUM_NC) {
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const gpio_config_t rst_gpio_config = {
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.mode = GPIO_MODE_OUTPUT,
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.pin_bit_mask = BIT64(cst816s->config.rst_gpio_num)
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};
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ESP_GOTO_ON_ERROR(gpio_config(&rst_gpio_config), err, TAG, "GPIO reset config failed");
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}
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/* Reset controller */
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ESP_GOTO_ON_ERROR(reset(cst816s), err, TAG, "Reset failed");
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/* Read product id */
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#ifdef CONFIG_ESP_LCD_TOUCH_CST816S_DISABLE_READ_ID
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ESP_LOGI(TAG, "Read ID disabled");
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#else
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ESP_GOTO_ON_ERROR(read_id(cst816s), err, TAG, "Read ID failed");
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#endif
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*tp = cst816s;
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return ESP_OK;
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err:
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if (cst816s) {
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del(cst816s);
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}
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ESP_LOGE(TAG, "Initialization failed!");
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return ret;
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}
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static esp_err_t read_data(esp_lcd_touch_handle_t tp)
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{
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typedef struct {
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uint8_t num;
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uint8_t x_h : 4;
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uint8_t : 4;
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uint8_t x_l;
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uint8_t y_h : 4;
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uint8_t : 4;
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uint8_t y_l;
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} data_t;
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data_t point;
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ESP_RETURN_ON_ERROR(i2c_read_bytes(tp, DATA_START_REG, (uint8_t *)&point, sizeof(data_t)), TAG, "I2C read failed");
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portENTER_CRITICAL(&tp->data.lock);
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point.num = (point.num > POINT_NUM_MAX ? POINT_NUM_MAX : point.num);
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tp->data.points = point.num;
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/* Fill all coordinates */
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for (int i = 0; i < point.num; i++) {
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tp->data.coords[i].x = point.x_h << 8 | point.x_l;
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tp->data.coords[i].y = point.y_h << 8 | point.y_l;
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}
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portEXIT_CRITICAL(&tp->data.lock);
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return ESP_OK;
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}
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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)
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{
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portENTER_CRITICAL(&tp->data.lock);
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/* Count of points */
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*point_num = (tp->data.points > max_point_num ? max_point_num : tp->data.points);
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for (size_t i = 0; i < *point_num; i++) {
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x[i] = tp->data.coords[i].x;
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y[i] = tp->data.coords[i].y;
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if (strength) {
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strength[i] = tp->data.coords[i].strength;
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}
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}
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/* Invalidate */
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tp->data.points = 0;
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portEXIT_CRITICAL(&tp->data.lock);
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return (*point_num > 0);
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}
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static esp_err_t del(esp_lcd_touch_handle_t tp)
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{
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/* Reset GPIO pin settings */
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if (tp->config.int_gpio_num != GPIO_NUM_NC) {
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gpio_reset_pin(tp->config.int_gpio_num);
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if (tp->config.interrupt_callback) {
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gpio_isr_handler_remove(tp->config.int_gpio_num);
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}
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}
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if (tp->config.rst_gpio_num != GPIO_NUM_NC) {
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gpio_reset_pin(tp->config.rst_gpio_num);
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}
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/* Release memory */
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free(tp);
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return ESP_OK;
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}
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static esp_err_t reset(esp_lcd_touch_handle_t tp)
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{
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if (tp->config.rst_gpio_num != GPIO_NUM_NC) {
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ESP_RETURN_ON_ERROR(gpio_set_level(tp->config.rst_gpio_num, tp->config.levels.reset), TAG, "GPIO set level failed");
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vTaskDelay(pdMS_TO_TICKS(200));
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ESP_RETURN_ON_ERROR(gpio_set_level(tp->config.rst_gpio_num, !tp->config.levels.reset), TAG, "GPIO set level failed");
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vTaskDelay(pdMS_TO_TICKS(200));
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}
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return ESP_OK;
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}
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#ifndef CONFIG_ESP_LCD_TOUCH_CST816S_DISABLE_READ_ID
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static esp_err_t read_id(esp_lcd_touch_handle_t tp)
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{
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uint8_t id;
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ESP_RETURN_ON_ERROR(i2c_read_bytes(tp, CHIP_ID_REG, &id, 1), TAG, "I2C read failed");
|
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ESP_LOGI(TAG, "IC id: %d", id);
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return ESP_OK;
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}
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#endif
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static esp_err_t i2c_read_bytes(esp_lcd_touch_handle_t tp, uint16_t reg, uint8_t *data, uint8_t len)
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||||
{
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ESP_RETURN_ON_FALSE(data, ESP_ERR_INVALID_ARG, TAG, "Invalid data");
|
||||
|
||||
return esp_lcd_panel_io_rx_param(tp->io, reg, data, len);
|
||||
}
|
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@@ -0,0 +1,9 @@
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dependencies:
|
||||
esp_lcd_touch:
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||||
public: true
|
||||
version: ^1.0.4
|
||||
idf: '>=4.4.2'
|
||||
description: ESP LCD Touch CST816S - touch controller CST816S
|
||||
repository: git://github.com/espressif/esp-bsp.git
|
||||
url: https://github.com/espressif/esp-bsp/tree/master/components/lcd_touch/esp_lcd_touch_cst816s
|
||||
version: 1.1.0
|
||||
@@ -0,0 +1,81 @@
|
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/*
|
||||
* SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file
|
||||
* @brief ESP LCD touch: CST816S
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "esp_idf_version.h"
|
||||
#include "esp_lcd_touch.h"
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||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/**
|
||||
* @brief Create a new CST816S 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_cst816s(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 CST816S controller
|
||||
*
|
||||
*/
|
||||
#define ESP_LCD_TOUCH_IO_I2C_CST816S_ADDRESS (0x15)
|
||||
|
||||
/**
|
||||
* @brief Touch IO configuration structure
|
||||
*
|
||||
*/
|
||||
#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 2, 0)
|
||||
#define ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG() \
|
||||
{ \
|
||||
.dev_addr = ESP_LCD_TOUCH_IO_I2C_CST816S_ADDRESS, \
|
||||
.on_color_trans_done = 0, \
|
||||
.user_ctx = 0, \
|
||||
.control_phase_bytes = 1, \
|
||||
.dc_bit_offset = 0, \
|
||||
.lcd_cmd_bits = 8, \
|
||||
.lcd_param_bits = 0, \
|
||||
.flags = \
|
||||
{ \
|
||||
.dc_low_on_data = 0, \
|
||||
.disable_control_phase = 1, \
|
||||
} \
|
||||
}
|
||||
#else
|
||||
#define ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG() \
|
||||
{ \
|
||||
.dev_addr = ESP_LCD_TOUCH_IO_I2C_CST816S_ADDRESS, \
|
||||
.on_color_trans_done = 0, \
|
||||
.user_ctx = 0, \
|
||||
.control_phase_bytes = 1, \
|
||||
.dc_bit_offset = 0, \
|
||||
.lcd_cmd_bits = 8, \
|
||||
.lcd_param_bits = 0, \
|
||||
.flags = \
|
||||
{ \
|
||||
.dc_low_on_data = 0, \
|
||||
.disable_control_phase = 1, \
|
||||
}, \
|
||||
.scl_speed_hz = 100000 \
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
202
managed_components/espressif__esp_lcd_touch_cst816s/license.txt
Normal file
202
managed_components/espressif__esp_lcd_touch_cst816s/license.txt
Normal file
@@ -0,0 +1,202 @@
|
||||
|
||||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
1. Definitions.
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|
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"License" shall mean the terms and conditions for use, reproduction,
|
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|
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|
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|
||||
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|
||||
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|
||||
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|
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|
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|
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@@ -0,0 +1,6 @@
|
||||
# The following lines of boilerplate have to be in your project's CMakeLists
|
||||
# in this exact order for cmake to work correctly
|
||||
cmake_minimum_required(VERSION 3.5)
|
||||
set(EXTRA_COMPONENT_DIRS "$ENV{IDF_PATH}/tools/unit-test-app/components")
|
||||
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
|
||||
project(test_esp_lcd_touch_cst816s)
|
||||
@@ -0,0 +1 @@
|
||||
idf_component_register(SRCS "test_esp_lcd_touch_cst816s.c")
|
||||
@@ -0,0 +1,6 @@
|
||||
## IDF Component Manager Manifest File
|
||||
dependencies:
|
||||
idf: ">=4.4"
|
||||
esp_lcd_touch_cst816s:
|
||||
version: "*"
|
||||
override_path: "../../../esp_lcd_touch_cst816s"
|
||||
@@ -0,0 +1,69 @@
|
||||
/*
|
||||
* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
|
||||
*
|
||||
* SPDX-License-Identifier: CC0-1.0
|
||||
*/
|
||||
|
||||
#include <inttypes.h>
|
||||
#include "driver/i2c.h"
|
||||
#include "driver/gpio.h"
|
||||
#include "esp_log.h"
|
||||
#include "unity.h"
|
||||
#include "unity_test_runner.h"
|
||||
|
||||
#include "esp_lcd_touch_cst816s.h"
|
||||
|
||||
#define TEST_TOUCH_I2C_NUM (0)
|
||||
#define TEST_TOUCH_I2C_CLK_HZ (400000)
|
||||
|
||||
#define TEST_LCD_H_RES (240)
|
||||
#define TEST_LCD_V_RES (240)
|
||||
|
||||
/* LCD touch pins */
|
||||
#define TEST_TOUCH_I2C_SCL (GPIO_NUM_18)
|
||||
#define TEST_TOUCH_I2C_SDA (GPIO_NUM_8)
|
||||
#define TEST_TOUCH_GPIO_INT (GPIO_NUM_3)
|
||||
|
||||
TEST_CASE("test cst816s to initialize touch", "[cst816s][i2c]")
|
||||
{
|
||||
/* Initilize I2C */
|
||||
const i2c_config_t i2c_conf = {
|
||||
.mode = I2C_MODE_MASTER,
|
||||
.sda_io_num = TEST_TOUCH_I2C_SDA,
|
||||
.sda_pullup_en = GPIO_PULLUP_DISABLE,
|
||||
.scl_io_num = TEST_TOUCH_I2C_SCL,
|
||||
.scl_pullup_en = GPIO_PULLUP_DISABLE,
|
||||
.master.clk_speed = TEST_TOUCH_I2C_CLK_HZ
|
||||
};
|
||||
TEST_ESP_OK(i2c_param_config(TEST_TOUCH_I2C_NUM, &i2c_conf));
|
||||
TEST_ESP_OK(i2c_driver_install(TEST_TOUCH_I2C_NUM, i2c_conf.mode, 0, 0, 0));
|
||||
|
||||
/* Initialize touch HW */
|
||||
const esp_lcd_touch_config_t tp_cfg = {
|
||||
.x_max = TEST_LCD_H_RES,
|
||||
.y_max = TEST_LCD_V_RES,
|
||||
.rst_gpio_num = GPIO_NUM_NC, // Shared with LCD reset
|
||||
.int_gpio_num = TEST_TOUCH_GPIO_INT,
|
||||
.levels = {
|
||||
.reset = 0,
|
||||
.interrupt = 0,
|
||||
},
|
||||
.flags = {
|
||||
.swap_xy = 0,
|
||||
.mirror_x = 1,
|
||||
.mirror_y = 0,
|
||||
},
|
||||
};
|
||||
|
||||
esp_lcd_touch_handle_t touch_handle;
|
||||
esp_lcd_panel_io_handle_t tp_io_handle = NULL;
|
||||
const esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG();
|
||||
TEST_ESP_OK(esp_lcd_new_panel_io_i2c((esp_lcd_i2c_bus_handle_t)TEST_TOUCH_I2C_NUM, &tp_io_config, &tp_io_handle));
|
||||
TEST_ESP_OK(esp_lcd_touch_new_i2c_cst816s(tp_io_handle, &tp_cfg, &touch_handle));
|
||||
}
|
||||
|
||||
void app_main(void)
|
||||
{
|
||||
printf("CST816S Test\r\n");
|
||||
unity_run_menu();
|
||||
}
|
||||
@@ -0,0 +1,2 @@
|
||||
CONFIG_FREERTOS_HZ=1000
|
||||
CONFIG_ESP_TASK_WDT_EN=n
|
||||
Reference in New Issue
Block a user