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73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Device;
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struct DeviceType;
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typedef void* UsbHidQueueHandle;
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/** Key values — numerically identical to lv_key_t so no translation is needed. */
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typedef enum {
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USB_HID_KEY_UP = 17,
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USB_HID_KEY_DOWN = 18,
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USB_HID_KEY_RIGHT = 19,
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USB_HID_KEY_LEFT = 20,
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USB_HID_KEY_ESC = 27,
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USB_HID_KEY_DEL = 127,
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USB_HID_KEY_BACKSPACE = 8,
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USB_HID_KEY_ENTER = 10,
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USB_HID_KEY_NEXT = 9,
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USB_HID_KEY_PREV = 11,
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USB_HID_KEY_HOME = 2,
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USB_HID_KEY_END = 3,
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} UsbHidKey;
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typedef enum {
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USB_HID_EVENT_KEY,
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USB_HID_EVENT_MOUSE_MOVE,
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USB_HID_EVENT_MOUSE_BTN,
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USB_HID_EVENT_SCROLL,
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USB_HID_EVENT_KEYBOARD_CONNECTED,
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USB_HID_EVENT_KEYBOARD_DISCONNECTED,
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USB_HID_EVENT_MOUSE_CONNECTED,
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USB_HID_EVENT_MOUSE_DISCONNECTED,
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} UsbHidEventType;
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typedef struct {
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UsbHidEventType type;
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union {
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struct { uint32_t key_code; bool pressed; } key;
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struct { int32_t dx; int32_t dy; } mouse_move;
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struct { bool button1; bool button2; } mouse_btn;
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struct { int32_t delta; } scroll;
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};
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} UsbHidEvent;
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struct UsbHidApi {
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bool (*is_connected)(struct Device* device);
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bool (*subscribe)(struct Device* device, UsbHidQueueHandle event_queue);
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void (*unsubscribe)(struct Device* device, UsbHidQueueHandle event_queue);
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};
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extern const struct DeviceType USB_HOST_HID_TYPE;
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/** Returns true if any HID device (keyboard or mouse) is currently connected. */
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bool usb_host_hid_is_connected(struct Device* device);
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/** Subscribe a FreeRTOS queue to receive UsbHidEvent items from the HID driver. */
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bool usb_host_hid_subscribe(struct Device* device, UsbHidQueueHandle event_queue);
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/** Unsubscribe a previously subscribed queue. */
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void usb_host_hid_unsubscribe(struct Device* device, UsbHidQueueHandle event_queue);
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#ifdef __cplusplus
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}
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#endif
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