106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-10-18 Meco Man The first version
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*/
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#include <lvgl.h>
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#include <stdbool.h>
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#include <rtdevice.h>
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#define UP_KEY 2
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#define DOWN_KEY 18
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#define LEFT_KEY 16
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#define RIGHT_KEY 20
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#define CRTL_KEY 3
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#define BUTTON0_PIN 2
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#define BUTTON1_PIN 18
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#define BUTTON2_PIN 16
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#define BUTTON_WKUP_PIN 20
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/*Test if `id` button is pressed or not*/
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static bool button_is_pressed(uint8_t id)
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{
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switch(id)
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{
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case 0:
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if(rt_pin_read(BUTTON0_PIN) == PIN_LOW)
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return true;
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break;
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case 1:
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if(rt_pin_read(BUTTON1_PIN) == PIN_LOW)
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return true;
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break;
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case 2:
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if(rt_pin_read(BUTTON2_PIN) == PIN_LOW)
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return true;
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break;
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case 3:
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if(rt_pin_read(BUTTON_WKUP_PIN) == PIN_LOW)
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return true;
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break;
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}
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return false;
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}
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static int8_t button_get_pressed_id(void)
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{
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uint8_t i;
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/*Check to buttons see which is being pressed*/
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for(i = 0; i < 4; i++)
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{
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/*Return the pressed button's ID*/
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if(button_is_pressed(i))
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{
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return i;
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}
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}
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/*No button pressed*/
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return -1;
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}
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void button_read(lv_indev_drv_t * drv, lv_indev_data_t*data)
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{
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static uint32_t last_btn = 0; /*Store the last pressed button*/
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int btn_pr = button_get_pressed_id(); /*Get the ID (0,1,2...) of the pressed button*/
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if(btn_pr >= 0)
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{ /*Is there a button press? (E.g. -1 indicated no button was pressed)*/
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last_btn = btn_pr; /*Save the ID of the pressed button*/
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data->state = LV_INDEV_STATE_PRESSED; /*Set the pressed state*/
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}
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else
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{
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data->state = LV_INDEV_STATE_RELEASED; /*Set the released state*/
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}
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data->btn_id = last_btn; /*Save the last button*/
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}
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lv_indev_t * button_indev;
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void lv_port_indev_init(void)
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{
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static lv_indev_drv_t indev_drv;
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/* Initialize the on-board buttons */
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rt_pin_mode(BUTTON0_PIN, PIN_MODE_INPUT);
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rt_pin_mode(BUTTON1_PIN, PIN_MODE_INPUT);
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rt_pin_mode(BUTTON2_PIN, PIN_MODE_INPUT);
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rt_pin_mode(BUTTON_WKUP_PIN, PIN_MODE_INPUT);
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lv_indev_drv_init(&indev_drv); /*Basic initialization*/
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indev_drv.type = LV_INDEV_TYPE_BUTTON;
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indev_drv.read_cb = button_read;
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/*Register the driver in LVGL and save the created input device object*/
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button_indev = lv_indev_drv_register(&indev_drv);
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}
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