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git.gir.st - tmk_keyboard.git/blob - pjrc/usb_keyboard.c
1 #include <avr/interrupt.h>
2 #include <avr/pgmspace.h>
3 #include "usb_keycodes.h"
4 #include "usb_keyboard.h"
11 // protocol setting from the host. We use exactly the same report
12 // either way, so this variable only stores the setting since we
13 // are required to be able to report which setting is in use.
14 uint8_t usb_keyboard_protocol
=1;
16 // the idle configuration, how often we send the report to the
17 // host (ms * 4) even when it hasn't changed
18 uint8_t usb_keyboard_idle_config
=125;
20 // count until idle timeout
21 uint8_t usb_keyboard_idle_count
=0;
23 // 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
24 volatile uint8_t usb_keyboard_leds
=0;
27 static inline int8_t send_report(report_keyboard_t
*report
, uint8_t endpoint
, uint8_t keys_start
, uint8_t keys_end
);
30 int8_t usb_keyboard_send_report(report_keyboard_t
*report
)
34 #ifdef USB_NKRO_ENABLE
36 result
= send_report(report
, KBD2_ENDPOINT
, 0, KBD2_REPORT_KEYS
);
40 if (usb_keyboard_protocol
)
41 result
= send_report(report
, KBD_ENDPOINT
, 0, KBD_REPORT_KEYS
);
43 result
= send_report(report
, KBD_ENDPOINT
, 0, 6);
46 if (result
) return result
;
47 usb_keyboard_idle_count
= 0;
48 usb_keyboard_print_report(report
);
52 void usb_keyboard_print_report(report_keyboard_t
*report
)
54 if (!debug_keyboard
) return;
56 for (int i
= 0; i
< REPORT_KEYS
; i
++) { phex(report
->keys
[i
]); print(" "); }
57 print(" mods: "); phex(report
->mods
); print("\n");
61 static inline int8_t send_report(report_keyboard_t
*report
, uint8_t endpoint
, uint8_t keys_start
, uint8_t keys_end
)
63 uint8_t intr_state
, timeout
;
65 if (!usb_configured()) return -1;
69 timeout
= UDFNUML
+ 50;
71 // are we ready to transmit?
72 if (UEINTX
& (1<<RWAL
)) break;
74 // has the USB gone offline?
75 if (!usb_configured()) return -1;
76 // have we waited too long?
77 if (UDFNUML
== timeout
) return -1;
78 // get ready to try checking again
83 UEDATX
= report
->mods
;
86 for (uint8_t i
= keys_start
; i
< keys_end
; i
++) {
87 UEDATX
= report
->keys
[i
];