124 lines
4 KiB
C
124 lines
4 KiB
C
/*
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* Copyright © 2022 Band Industries 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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#include <esp_log.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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#include "CST816.h"
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#include "lvgl_i2c/i2c_manager.h"
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#define TAG "CST816"
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uint8_t CST816_addr;
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static esp_err_t _cst816_i2c_read(uint8_t slave_addr, uint8_t register_addr, uint8_t *data_buf, uint8_t len) {
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return lvgl_i2c_read(CONFIG_LV_I2C_TOUCH_PORT, slave_addr, register_addr, data_buf, len);
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}
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// static esp_err_t _cst816_i2c_write8(uint8_t slave_addr, uint8_t register_addr, uint8_t data) {
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// return lvgl_i2c_write(CONFIG_LV_I2C_TOUCH_PORT, slave_addr, register_addr, &data, 1);
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// }
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/**
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* @brief Initialize for cst816 communication via I2C
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* @param dev_addr: Device address on communication Bus (I2C slave address of cst816).
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* @retval None
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*/
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void cst816_init(uint8_t dev_addr) {
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CST816_addr = dev_addr;
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uint8_t version;
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uint8_t versionInfo[3];
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esp_err_t ret;
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ESP_LOGI(TAG, "Initializing cst816 %d", dev_addr);
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if ((ret = _cst816_i2c_read(dev_addr, 0x15, &version, 1) != ESP_OK))
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{
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ESP_LOGE(TAG, "Error reading version from device: %s",
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esp_err_to_name(ret)); // Only show error the first time
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return;
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}
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if ((ret = _cst816_i2c_read(dev_addr, 0xA7, versionInfo, 3) != ESP_OK))
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{
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ESP_LOGE(TAG, "Error reading versionInfo from device: %s",
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esp_err_to_name(ret)); // Only show error the first time
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return;
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}
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ESP_LOGI(TAG, "CST816 version %d, versionInfo: %d.%d.%d", version, versionInfo[0], versionInfo[1], versionInfo[2]);
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}
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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 cst816_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
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uint8_t data_raw[8] ;
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_cst816_i2c_read(CST816_addr, 0x01, data_raw, 6);
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// printf("Touch data: ");
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// for(int i = 0; i < 6; i++)
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// {
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// printf("0x%02X ", data_raw[i]);
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// }
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// printf("\r\n");
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uint8_t gestureID = data_raw[0];
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uint8_t points = data_raw[1];
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uint8_t event = data_raw[2] >> 6;
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uint16_t point_x = 0;
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uint16_t point_y = 0;
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if(points == 0)
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{
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data->state = LV_INDEV_STATE_RELEASED;
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return false;
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}
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data->state = LV_INDEV_STATE_PRESSED;
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point_x = (data_raw[3] | ((data_raw[2] & 0x0F) << 8));
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point_y = (data_raw[5] | ((data_raw[4] & 0x0F) << 8));
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#if CONFIG_LV_SWAPXY_CST816
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int temp;
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temp = point_y;
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point_y = point_x;
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point_x = temp;
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#endif
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#if CONFIG_LV_INVERT_X_CST816
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point_x = CONFIG_LV_TOUCH_X_MAX_CST816 - point_x;
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#endif
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#if CONFIG_LV_INVERT_Y_CST816
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point_y = CONFIG_LV_TOUCH_Y_MAX_CST816 - point_y;
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#endif
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data->point.x = point_x;
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data->point.y = point_y;
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ESP_LOGI(TAG, "gestureID %d, points %d, event %d X=%u Y=%u", gestureID, points, event, data->point.x, data->point.y);
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return false;
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}
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