X-Git-Url: https://git.cryptolib.org/?p=labortage2013badge.git;a=blobdiff_plain;f=firmware%2Fspecial_functions.S;fp=firmware%2Fspecial_functions.S;h=88ae6dcba8393a330bda2cce8c036c6c9fc7c488;hp=0000000000000000000000000000000000000000;hb=06016b0f48e8407fdc6000735d310b84fd1fd0bc;hpb=14a4df0d4392a668439c879c89e135d5ac345688

diff --git a/firmware/special_functions.S b/firmware/special_functions.S
new file mode 100644
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