mirror of
https://github.com/moparisthebest/tmk_keyboard
synced 2024-11-14 21:35:05 -05:00
34 lines
654 B
C
34 lines
654 B
C
|
#include <avr/interrupt.h>
|
||
|
|
#include "usb_extra.h"
|
||
|
|
|
||
|
|
int8_t usb_extra_send(uint8_t bits)
|
||
|
|
{
|
||
|
|
uint8_t intr_state, timeout;
|
||
|
|
|
||
|
|
if (!usb_configured()) return -1;
|
||
|
|
intr_state = SREG;
|
||
|
|
cli();
|
||
|
|
UENUM = EXTRA_ENDPOINT;
|
||
|
|
timeout = UDFNUML + 50;
|
||
|
|
while (1) {
|
||
|
|
// are we ready to transmit?
|
||
|
|
if (UEINTX & (1<<RWAL)) break;
|
||
|
|
SREG = intr_state;
|
||
|
|
// has the USB gone offline?
|
||
|
|
if (!usb_configured()) return -1;
|
||
|
|
// have we waited too long?
|
||
|
|
if (UDFNUML == timeout) return -1;
|
||
|
|
// get ready to try checking again
|
||
|
|
intr_state = SREG;
|
||
|
|
cli();
|
||
|
|
UENUM = EXTRA_ENDPOINT;
|
||
|
|
}
|
||
|
|
|
||
|
|
UEDATX = 1; // report id
|
||
|
|
UEDATX = bits;
|
||
|
|
|
||
|
|
UEINTX = 0x3A;
|
||
|
|
SREG = intr_state;
|
||
|
|
return 0;
|
||
|
|
}
|