keyboard functionality still not working

[labortage2013badge.git] / firmware / special_functions.S

diff --git a/firmware/special_functions.S b/firmware/special_functions.S
new file mode 100644 (file)
index 0000000..88ae6dc
--- /dev/null
+++ b/firmware/special_functions.S
@@ -0,0 +1,70 @@
+/* special_functions.S */
+/*
+    This file is part of the Labotage2011_Badge.
+    Copyright (C) 2011 Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/io.h>
+#include "usbconfig.h"
+
+.global exec_spm
+/* void exec_spm(uint16_t z, uint16_t r0r1, void* dest, void* src, uint8_t len); */
+exec_spm:
+       push r28
+       push r29
+       movw r30, r24
+       movw r0, r22
+       movw r28, r20
+       movw r26, r18
+       movw r24, r16
+       in r23, _SFR_IO_ADDR(SREG)
+       cli
+       tst r24
+       breq spm_cmd
+       dec r24
+       breq last_store
+copy_loop:
+       ld r22, X+
+       st Y+, r22
+       dec r24
+       brne copy_loop
+last_store:
+       ld r22, X+
+       st Y+, r22
+spm_cmd:
+       spm
+       out _SFR_IO_ADDR(SREG), r23
+       clr r1
+       pop r29
+       pop r28
+       ret
+
+.global soft_reset
+soft_reset:
+       cli
+       andi r24, 0x0F
+       cpi r24, 0x0F
+       breq 1f
+       bst r24, 3
+       bld r24, 5
+       ori r24, 0x08
+       ldi r25, 0x18
+       or r25, r24
+       sbi _SFR_IO_ADDR(PORTB), USB_CFG_DMINUS_BIT
+       out _SFR_IO_ADDR(WDTCR), r25
+       out _SFR_IO_ADDR(WDTCR), r24
+1:
+       rjmp 1b