ref: 0.12.0
src/libs/lvgl/porting/lv_port_indev_template.c
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/** * @file lv_port_indev_templ.c * */ /*Copy this file as "lv_port_indev.c" and set this value to "1" to enable content*/ #if 0 /********************* * INCLUDES *********************/ #include "lv_port_indev_template.h" /********************* * DEFINES *********************/ /********************** * TYPEDEFS **********************/ /********************** * STATIC PROTOTYPES **********************/ static void touchpad_init(void); static bool touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static bool touchpad_is_pressed(void); static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y); static void mouse_init(void); static bool mouse_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static bool mouse_is_pressed(void); static void mouse_get_xy(lv_coord_t * x, lv_coord_t * y); static void keypad_init(void); static bool keypad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static uint32_t keypad_get_key(void); static void encoder_init(void); static bool encoder_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static void encoder_handler(void); static void button_init(void); static bool button_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static int8_t button_get_pressed_id(void); static bool button_is_pressed(uint8_t id); /********************** * STATIC VARIABLES **********************/ lv_indev_t * indev_touchpad; lv_indev_t * indev_mouse; lv_indev_t * indev_keypad; lv_indev_t * indev_encoder; lv_indev_t * indev_button; static int32_t encoder_diff; static lv_indev_state_t encoder_state; /********************** * MACROS **********************/ /********************** * GLOBAL FUNCTIONS **********************/ void lv_port_indev_init(void) { /* Here you will find example implementation of input devices supported by LittelvGL: * - Touchpad * - Mouse (with cursor support) * - Keypad (supports GUI usage only with key) * - Encoder (supports GUI usage only with: left, right, push) * - Button (external buttons to press points on the screen) * * The `..._read()` function are only examples. * You should shape them according to your hardware */ lv_indev_drv_t indev_drv; /*------------------ * Touchpad * -----------------*/ /*Initialize your touchpad if you have*/ touchpad_init(); /*Register a touchpad input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.read_cb = touchpad_read; indev_touchpad = lv_indev_drv_register(&indev_drv); /*------------------ * Mouse * -----------------*/ /*Initialize your touchpad if you have*/ mouse_init(); /*Register a mouse input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.read_cb = mouse_read; indev_mouse = lv_indev_drv_register(&indev_drv); /*Set cursor. For simplicity set a HOME symbol now.*/ lv_obj_t * mouse_cursor = lv_img_create(lv_disp_get_scr_act(NULL), NULL); lv_img_set_src(mouse_cursor, LV_SYMBOL_HOME); lv_indev_set_cursor(indev_mouse, mouse_cursor); /*------------------ * Keypad * -----------------*/ /*Initialize your keypad or keyboard if you have*/ keypad_init(); /*Register a keypad input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_KEYPAD; indev_drv.read_cb = keypad_read; indev_keypad = lv_indev_drv_register(&indev_drv); /* Later you should create group(s) with `lv_group_t * group = lv_group_create()`, * add objects to the group with `lv_group_add_obj(group, obj)` * and assign this input device to group to navigate in it: * `lv_indev_set_group(indev_keypad, group);` */ /*------------------ * Encoder * -----------------*/ /*Initialize your encoder if you have*/ encoder_init(); /*Register a encoder input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_KEYPAD; indev_drv.read_cb = encoder_read; indev_encoder = lv_indev_drv_register(&indev_drv); /* Later you should create group(s) with `lv_group_t * group = lv_group_create()`, * add objects to the group with `lv_group_add_obj(group, obj)` * and assign this input device to group to navigate in it: * `lv_indev_set_group(indev_keypad, group);` */ /*------------------ * Button * -----------------*/ /*Initialize your button if you have*/ button_init(); /*Register a button input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_BUTTON; indev_drv.read_cb = button_read; indev_button = lv_indev_drv_register(&indev_drv); /*Assign buttons to points on the screen*/ static const lv_point_t btn_points[2] = { {10, 10}, /*Button 0 -> x:10; y:10*/ {40, 100}, /*Button 1 -> x:40; y:100*/ }; lv_indev_set_button_points(indev_button, btn_points); } /********************** * STATIC FUNCTIONS **********************/ /*------------------ * Touchpad * -----------------*/ /*Initialize your touchpad*/ static void touchpad_init(void) { /*Your code comes here*/ } /* Will be called by the library to read the touchpad */ static bool touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data) { static lv_coord_t last_x = 0; static lv_coord_t last_y = 0; /*Save the pressed coordinates and the state*/ if(touchpad_is_pressed()) { touchpad_get_xy(&last_x, &last_y); data->state = LV_INDEV_STATE_PR; } else { data->state = LV_INDEV_STATE_REL; } /*Set the last pressed coordinates*/ data->point.x = last_x; data->point.y = last_y; /*Return `false` because we are not buffering and no more data to read*/ return false; } /*Return true is the touchpad is pressed*/ static bool touchpad_is_pressed(void) { /*Your code comes here*/ return false; } /*Get the x and y coordinates if the touchpad is pressed*/ static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y) { /*Your code comes here*/ (*x) = 0; (*y) = 0; } /*------------------ * Mouse * -----------------*/ /* Initialize your mouse */ static void mouse_init(void) { /*Your code comes here*/ } /* Will be called by the library to read the mouse */ static bool mouse_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data) { /*Get the current x and y coordinates*/ mouse_get_xy(&data->point.x, &data->point.y); /*Get whether the mouse button is pressed or released*/ if(mouse_is_pressed()) { data->state = LV_INDEV_STATE_PR; } else { data->state = LV_INDEV_STATE_REL; } /*Return `false` because we are not buffering and no more data to read*/ return false; } /*Return true is the mouse button is pressed*/ static bool mouse_is_pressed(void) { /*Your code comes here*/ return false; } /*Get the x and y coordinates if the mouse is pressed*/ static void mouse_get_xy(lv_coord_t * x, lv_coord_t * y) { /*Your code comes here*/ (*x) = 0; (*y) = 0; } /*------------------ * Keypad * -----------------*/ /* Initialize your keypad */ static void keypad_init(void) { /*Your code comes here*/ } /* Will be called by the library to read the mouse */ static bool keypad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data) { static uint32_t last_key = 0; /*Get the current x and y coordinates*/ mouse_get_xy(&data->point.x, &data->point.y); /*Get whether the a key is pressed and save the pressed key*/ uint32_t act_key = keypad_get_key(); if(act_key != 0) { data->state = LV_INDEV_STATE_PR; /*Translate the keys to LittlevGL control characters according to your key definitions*/ switch(act_key) { case 1: act_key = LV_KEY_NEXT; break; case 2: act_key = LV_KEY_PREV; break; case 3: act_key = LV_KEY_LEFT; break; case 4: act_key = LV_KEY_RIGHT; break; case 5: act_key = LV_KEY_ENTER; break; } last_key = act_key; } else { data->state = LV_INDEV_STATE_REL; } data->key = last_key; /*Return `false` because we are not buffering and no more data to read*/ return false; } /*Get the currently being pressed key. 0 if no key is pressed*/ static uint32_t keypad_get_key(void) { /*Your code comes here*/ return 0; } /*------------------ * Encoder * -----------------*/ /* Initialize your keypad */ static void encoder_init(void) { /*Your code comes here*/ } /* Will be called by the library to read the encoder */ static bool encoder_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data) { data->enc_diff = encoder_diff; data->state = encoder_state; /*Return `false` because we are not buffering and no more data to read*/ return false; } /*Call this function in an interrupt to process encoder events (turn, press)*/ static void encoder_handler(void) { /*Your code comes here*/ encoder_diff += 0; encoder_state = LV_INDEV_STATE_REL; } /*------------------ * Button * -----------------*/ /* Initialize your buttons */ static void button_init(void) { /*Your code comes here*/ } /* Will be called by the library to read the button */ static bool button_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data) { static uint8_t last_btn = 0; /*Get the pressed button's ID*/ int8_t btn_act = button_get_pressed_id(); if(btn_act >= 0) { data->state = LV_INDEV_STATE_PR; last_btn = btn_act; } else { data->state = LV_INDEV_STATE_REL; } /*Save the last pressed button's ID*/ data->btn_id = last_btn; /*Return `false` because we are not buffering and no more data to read*/ return false; } /*Get ID (0, 1, 2 ..) of the pressed button*/ static int8_t button_get_pressed_id(void) { uint8_t i; /*Check to buttons see which is being pressed (assume there are 2 buttons)*/ for(i = 0; i < 2; i++) { /*Return the pressed button's ID*/ if(button_is_pressed(i)) { return i; } } /*No button pressed*/ return -1; } /*Test if `id` button is pressed or not*/ static bool button_is_pressed(uint8_t id) { /*Your code comes here*/ return false; } #else /* Enable this file at the top */ /* This dummy typedef exists purely to silence -Wpedantic. */ typedef int keep_pedantic_happy; #endif |