86 lines
1.6 KiB
C
86 lines
1.6 KiB
C
/**
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* @file FT81x.c
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "esp_system.h"
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#include "esp_log.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 <stddef.h>
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#include "FT81x.h"
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#include "../lvgl_tft/EVE.h"
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#include "../lvgl_tft/EVE_commands.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Get the current position and state of the touchpad
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* @param data store the read data here
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* @return false: because no more data to be read
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*/
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bool FT81x_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
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{
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static int16_t last_x = 0;
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static int16_t last_y = 0;
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bool touched = true;
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uint32_t XY = EVE_memRead32(REG_TOUCH_SCREEN_XY);
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uint16_t Y = XY & 0xffff;
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uint16_t X = XY >> 16;
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// is it not touched (or invalid because of calibration range)
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if(X == 0x8000 || Y == 0x8000 || X > LV_HOR_RES_MAX || Y > LV_VER_RES_MAX)
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{
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touched = false;
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X = last_x;
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Y = last_y;
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}
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else
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{
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last_x = X;
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last_y = Y;
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}
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data->point.x = X;
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data->point.y = Y;
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data->state = (touched == false ? LV_INDEV_STATE_REL : LV_INDEV_STATE_PR);
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return false;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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