+
+void usb_keyboard_set_mods(uint8_t mods)
+{
+ usb_keyboard_report->mods = mods;
+}
+
+void usb_keyboard_add_code(uint8_t code)
+{
+ if (IS_MOD(code)) {
+ usb_keyboard_add_mod(code);
+ } else {
+ usb_keyboard_add_key(code);
+ }
+}
+
+static inline void _add_key_byte(uint8_t code);
+static inline void _add_key_bit(uint8_t code);
+void usb_keyboard_add_key(uint8_t code)
+{
+#ifdef USB_NKRO_ENABLE
+ if (usb_keyboard_nkro) {
+ _add_key_bit(code);
+ return;
+ }
+#endif
+ _add_key_byte(code);
+}
+
+void usb_keyboard_add_mod(uint8_t code)
+{
+ usb_keyboard_report->mods |= MOD_BIT(code);
+}
+
+void usb_keyboard_del_code(uint8_t code)
+{
+ if (IS_MOD(code)) {
+ usb_keyboard_del_mod(code);
+ } else {
+ usb_keyboard_del_key(code);
+ }
+}
+
+void usb_keyboard_del_key(uint8_t code)
+{
+#ifdef USB_NKRO_ENABLE
+ if ((code>>3) < KEYS_MAX) {
+ usb_keyboard_keys[code>>3] &= ~(1<<(code&7));
+ }
+#else
+ for (int i = 0; i < KEYS_MAX; i++) {
+ if (usb_keyboard_report->keys[i] == code) {
+ usb_keyboard_report->keys[i] = KB_NO;
+ return;
+ }
+ }
+#endif
+}
+
+void usb_keyboard_del_mod(uint8_t code)
+{
+ usb_keyboard_report->mods &= ~MOD_BIT(code);
+}
+
+bool usb_keyboard_is_sent(void)
+{
+ return usb_keyboard_report->is_sent;
+}
+
+bool usb_keyboard_has_key(void)
+{
+ uint8_t keys = 0;
+ for (int i = 0; i < KEYS_MAX; i++) keys |= usb_keyboard_report->keys[i];
+ return keys ? true : false;
+}
+
+bool usb_keyboard_has_mod(void)
+{
+ return usb_keyboard_report->mods ? true : false;
+}
+
+uint8_t usb_keyboard_get_key(void)
+{
+#ifdef USB_NKRO_ENABLE
+ if (usb_keyboard_nkro) {
+ uint8_t i = 0;
+ for (; i < KEYS_MAX && !usb_keyboard_keys[i]; i++);
+ return i<<3 | biton(usb_keyboard_keys[i]);
+ }
+#endif
+ return usb_keyboard_keys[0];
+}
+
+void usb_keyboard_print_report(usb_keyboard_report_t *report)
+{
+ if (!debug_keyboard) return;
+ print("keys: ");
+ for (int i = 0; i < KEYS_MAX; i++) { phex(report->keys[i]); print(" "); }
+ print(" mods: "); phex(report->mods); print("\n");
+}
+
+
+static inline int8_t _send_report(usb_keyboard_report_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end)
+{
+ uint8_t intr_state, timeout;
+
+ if (!usb_configured()) return -1;
+ intr_state = SREG;
+ cli();
+ UENUM = 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 = endpoint;
+ }
+ UEDATX = report->mods;
+ if (!usb_keyboard_nkro)
+ UEDATX = 0;
+ for (uint8_t i = keys_start; i < keys_end; i++) {
+ UEDATX = report->keys[i];
+ }
+ UEINTX = 0x3A;
+ SREG = intr_state;
+ return 0;
+}
+
+static inline void _add_key_byte(uint8_t code)
+{
+ // TODO: fix ugly code
+ int8_t i = 0;
+ int8_t empty = -1;
+ for (; i < KEYS_MAX; i++) {
+ if (usb_keyboard_keys_prev[i] == code) {
+ usb_keyboard_keys[i] = code;
+ break;
+ }
+ if (empty == -1 &&
+ usb_keyboard_keys_prev[i] == 0 &&
+ usb_keyboard_keys[i] == 0) {
+ empty = i;
+ }
+ }
+ if (i == KEYS_MAX) {
+ if (empty != -1) {
+ usb_keyboard_keys[empty] = code;
+ }
+ }
+}
+
+static inline void _add_key_bit(uint8_t code)
+{
+ if ((code>>3) < KEYS_MAX) {
+ usb_keyboard_keys[code>>3] |= 1<<(code&7);
+ }
+}
+