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authortmk2010-11-17 16:06:20 +0900
committertmk2010-11-17 16:06:20 +0900
commit02d955e9fecda610e9cb7f5317262b907614bf31 (patch)
tree01a32f36bb17574f46c0d1848d87b0f750afdedc /usb_extra.c
parent8240e606d4571624c7967d6acfa562d70ff3ab97 (diff)
add audio controls from consumer page(HID)
Diffstat (limited to 'usb_extra.c')
-rw-r--r--usb_extra.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/usb_extra.c b/usb_extra.c
new file mode 100644
index 000000000..94c317d98
--- /dev/null
+++ b/usb_extra.c
@@ -0,0 +1,33 @@
+#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;
+}