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usb: hid: macro for report descriptor

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Added macro that generates simple report descriptor for mouse.
This improves the readability of hid-mouse sample.

Signed-off-by: Marcin Szymczyk <Marcin.Szymczyk@nordicsemi.no>
This commit is contained in:
Marcin Szymczyk 2018-12-17 14:50:27 +01:00 • committed by Anas Nashif
commit c716f9c5aa
2 changed files with 68 additions and 56 deletions
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67
include/usb/class/usb_hid.h
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@ -168,6 +168,73 @@ struct hid_ops {
#define HID_PROTOCOL_BOOT 0x00
#define HID_PROTOCOL_REPORT 0x01
/* Example HID report descriptors */
/**
* @brief Simple HID mouse report descriptor for n button mouse.
*
* @param bcnt Button count. Allowed values from 1 to 8.
*/
#define HID_MOUSE_REPORT_DESC(bcnt) { \
/* USAGE_PAGE (Generic Desktop) */ \
HID_GI_USAGE_PAGE, USAGE_GEN_DESKTOP, \
/* USAGE (Mouse) */ \
HID_LI_USAGE, USAGE_GEN_DESKTOP_MOUSE, \
/* COLLECTION (Application) */ \
HID_MI_COLLECTION, COLLECTION_APPLICATION, \
/* USAGE (Pointer) */ \
HID_LI_USAGE, USAGE_GEN_DESKTOP_POINTER, \
/* COLLECTION (Physical) */ \
HID_MI_COLLECTION, COLLECTION_PHYSICAL, \
/* Bits used for button signalling */ \
/* USAGE_PAGE (Button) */ \
HID_GI_USAGE_PAGE, USAGE_GEN_BUTTON, \
/* USAGE_MINIMUM (Button 1) */ \
HID_LI_USAGE_MIN(1), 0x01, \
/* USAGE_MAXIMUM (Button bcnt) */ \
HID_LI_USAGE_MAX(1), bcnt, \
/* LOGICAL_MINIMUM (0) */ \
HID_GI_LOGICAL_MIN(1), 0x00, \
/* LOGICAL_MAXIMUM (1) */ \
HID_GI_LOGICAL_MAX(1), 0x01, \
/* REPORT_SIZE (1) */ \
HID_GI_REPORT_SIZE, 0x01, \
/* REPORT_COUNT (bcnt) */ \
HID_GI_REPORT_COUNT, bcnt, \
/* INPUT (Data,Var,Abs) */ \
HID_MI_INPUT, 0x02, \
/* Unused bits */ \
/* REPORT_SIZE (8 - bcnt) */ \
HID_GI_REPORT_SIZE, (8 - bcnt), \
/* REPORT_COUNT (1) */ \
HID_GI_REPORT_COUNT, 0x01, \
/* INPUT (Cnst,Ary,Abs) */ \
HID_MI_INPUT, 0x01, \
/* X and Y axis, scroll */ \
/* USAGE_PAGE (Generic Desktop) */ \
HID_GI_USAGE_PAGE, USAGE_GEN_DESKTOP, \
/* USAGE (X) */ \
HID_LI_USAGE, USAGE_GEN_DESKTOP_X, \
/* USAGE (Y) */ \
HID_LI_USAGE, USAGE_GEN_DESKTOP_Y, \
/* USAGE (WHEEL) */ \
HID_LI_USAGE, USAGE_GEN_DESKTOP_WHEEL, \
/* LOGICAL_MINIMUM (-127) */ \
HID_GI_LOGICAL_MIN(1), -127, \
/* LOGICAL_MAXIMUM (127) */ \
HID_GI_LOGICAL_MAX(1), 127, \
/* REPORT_SIZE (8) */ \
HID_GI_REPORT_SIZE, 0x08, \
/* REPORT_COUNT (3) */ \
HID_GI_REPORT_COUNT, 0x03, \
/* INPUT (Data,Var,Rel) */ \
HID_MI_INPUT, 0x06, \
/* END_COLLECTION */ \
HID_MI_COLLECTION_END, \
/* END_COLLECTION */ \
HID_MI_COLLECTION_END, \
}
/* Register HID device */
void usb_hid_register_device(const u8_t *desc, size_t size,
const struct hid_ops *op);