1 files changed, 159 insertions, 0 deletions
diff --git a/protocol/iwrap/wd.h b/protocol/iwrap/wd.h
new file mode 100644
index 000000000..99058f033
--- /dev/null
+++ b/protocol/iwrap/wd.h
@@ -0,0 +1,159 @@
+/* This is from http://www.mtcnet.net/~henryvm/wdt/ */
+#ifndef _AVR_WD_H_
+#define _AVR_WD_H_
+#include <avr/io.h>
+/*
+Copyright (c) 2009, Curt Van Maanen
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+include usage-
+    #include "wd.h"             //if in same directory as project
+    #include <avr/wd.h>         //if wd.h is in avr directory
+set watchdog modes and prescale
+usage-
+    WD_SET(mode,[timeout]);     //prescale always set
+modes-
+    WD_OFF                      disabled
+    WD_RST                      normal reset mode
+    WD_IRQ                      interrupt only mode (if supported)
+    WD_RST_IRQ                  interrupt+reset mode (if supported)
+timeout-
+    WDTO_15MS                   default if no timeout provided
+    WDTO_30MS
+    WDTO_60MS
+    WDTO_120MS
+    WDTO_250MS
+    WDTO_500MS
+    WDTO_1S
+    WDTO_2S
+    WDTO_4S                     (if supported)
+    WDTO_8S                     (if supported)
+examples-
+    WD_SET(WD_RST,WDTO_1S);     //reset mode, 1s timeout
+    WD_SET(WD_OFF);             //watchdog disabled (if not fused on)
+    WD_SET(WD_RST);             //reset mode, 15ms (default timeout)
+    WD_SET(WD_IRQ,WDTO_120MS);  //interrupt only mode, 120ms timeout
+    WD_SET(WD_RST_IRQ,WDTO_2S); //interrupt+reset mode, 2S timeout
+for enhanced watchdogs, if the watchdog is not being used WDRF should be
+cleared on every power up or reset, along with disabling the watchdog-
+    WD_DISABLE();               //clear WDRF, then turn off watchdog
+*/
+//reset registers to the same name (MCUCSR)
+#if !defined(MCUCSR)
+#define MCUCSR                  MCUSR
+#endif
+//watchdog registers to the same name (WDTCSR)
+#if !defined(WDTCSR)
+#define WDTCSR                  WDTCR
+#endif
+//if enhanced watchdog, define irq values, create disable macro
+#if defined(WDIF)
+#define WD_IRQ                  0xC0
+#define WD_RST_IRQ              0xC8
+#define WD_DISABLE()            do{                       \
+                                    MCUCSR &= ~(1<<WDRF); \
+                                    WD_SET(WD_OFF);       \
+                                }while(0)
+#endif
+//all watchdogs
+#define WD_RST                  8
+#define WD_OFF                  0
+//prescale values
+#define WDTO_15MS               0
+#define WDTO_30MS               1
+#define WDTO_60MS               2
+#define WDTO_120MS              3
+#define WDTO_250MS              4
+#define WDTO_500MS              5
+#define WDTO_1S                 6
+#define WDTO_2S                 7
+//prescale values for avrs with WDP3
+#if defined(WDP3)
+#define WDTO_4S                 0x20
+#define WDTO_8S                 0x21
+#endif
+//watchdog reset
+#define WDR()                   __asm__ __volatile__("wdr")
+//avr reset using watchdog
+#define WD_AVR_RESET()          do{                              \
+                                    __asm__ __volatile__("cli"); \
+                                    WD_SET_UNSAFE(WD_RST);       \
+                                    while(1);                    \
+                                }while(0)
+/*set the watchdog-
+1. save SREG
+2. turn off irq's
+3. reset watchdog timer
+4. enable watchdog change
+5. write watchdog value
+6. restore SREG (restoring irq status)
+*/
+#define WD_SET(val,...)                                 \
+    __asm__ __volatile__(                               \
+        "in __tmp_reg__,__SREG__"           "\n\t"      \
+        "cli"                               "\n\t"      \
+        "wdr"                               "\n\t"      \
+        "sts %[wdreg],%[wden]"              "\n\t"      \
+        "sts %[wdreg],%[wdval]"             "\n\t"      \
+        "out __SREG__,__tmp_reg__"          "\n\t"      \
+        :                                               \
+        : [wdreg] "M" (&WDTCSR),                        \
+          [wden]  "r" ((uint8_t)(0x18)),                \
+          [wdval] "r" ((uint8_t)(val|(__VA_ARGS__+0)))  \
+        : "r0"                                          \
+)
+/*set the watchdog when I bit in SREG known to be clear-
+1. reset watchdog timer
+2. enable watchdog change
+5. write watchdog value
+*/
+#define WD_SET_UNSAFE(val,...)                          \
+    __asm__ __volatile__(                               \
+        "wdr"                               "\n\t"      \
+        "sts %[wdreg],%[wden]"              "\n\t"      \
+        "sts %[wdreg],%[wdval]"             "\n\t"      \
+        :                                               \
+        : [wdreg] "M" (&WDTCSR),                        \
+          [wden]  "r" ((uint8_t)(0x18)),                \
+          [wdval] "r" ((uint8_t)(val|(__VA_ARGS__+0)))  \
+)
+//for compatibility with avr/wdt.h
+#define wdt_enable(val) WD_SET(WD_RST,val)
+#define wdt_disable()   WD_SET(WD_OFF)
+#endif /* _AVR_WD_H_ */

diff --git a/protocol/iwrap/wd.h b/protocol/iwrap/wd.h new file mode 100644 index 000000000..99058f033 --- /dev/null +++ b/protocol/iwrap/wd.h
@@ -0,0 +1,159 @@
	1	/* This is from http://www.mtcnet.net/~henryvm/wdt/ */
	2	#ifndef _AVR_WD_H_
	3	#define _AVR_WD_H_
	4
	5	#include <avr/io.h>
	6
	7	/*
	8	Copyright (c) 2009, Curt Van Maanen
	9
	10	Permission to use, copy, modify, and/or distribute this software for any
	11	purpose with or without fee is hereby granted, provided that the above
	12	copyright notice and this permission notice appear in all copies.
	13
	14	THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	15	WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	16	MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	17	ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	18	WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	19	ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	20	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	21
	22
	23	include usage-
	24	#include "wd.h" //if in same directory as project
	25	#include <avr/wd.h> //if wd.h is in avr directory
	26
	27	set watchdog modes and prescale
	28
	29	usage-
	30	WD_SET(mode,[timeout]); //prescale always set
	31
	32	modes-
	33	WD_OFF disabled
	34	WD_RST normal reset mode
	35	WD_IRQ interrupt only mode (if supported)
	36	WD_RST_IRQ interrupt+reset mode (if supported)
	37
	38	timeout-
	39	WDTO_15MS default if no timeout provided
	40	WDTO_30MS
	41	WDTO_60MS
	42	WDTO_120MS
	43	WDTO_250MS
	44	WDTO_500MS
	45	WDTO_1S
	46	WDTO_2S
	47	WDTO_4S (if supported)
	48	WDTO_8S (if supported)
	49
	50	examples-
	51	WD_SET(WD_RST,WDTO_1S); //reset mode, 1s timeout
	52	WD_SET(WD_OFF); //watchdog disabled (if not fused on)
	53	WD_SET(WD_RST); //reset mode, 15ms (default timeout)
	54	WD_SET(WD_IRQ,WDTO_120MS); //interrupt only mode, 120ms timeout
	55	WD_SET(WD_RST_IRQ,WDTO_2S); //interrupt+reset mode, 2S timeout
	56
	57
	58	for enhanced watchdogs, if the watchdog is not being used WDRF should be
	59	cleared on every power up or reset, along with disabling the watchdog-
	60	WD_DISABLE(); //clear WDRF, then turn off watchdog
	61
	62	*/
	63
	64	//reset registers to the same name (MCUCSR)
	65	#if !defined(MCUCSR)
	66	#define MCUCSR MCUSR
	67	#endif
	68
	69	//watchdog registers to the same name (WDTCSR)
	70	#if !defined(WDTCSR)
	71	#define WDTCSR WDTCR
	72	#endif
	73
	74	//if enhanced watchdog, define irq values, create disable macro
	75	#if defined(WDIF)
	76	#define WD_IRQ 0xC0
	77	#define WD_RST_IRQ 0xC8
	78	#define WD_DISABLE() do{ \
	79	MCUCSR &= ~(1<<WDRF); \
	80	WD_SET(WD_OFF); \
	81	}while(0)
	82	#endif
	83
	84	//all watchdogs
	85	#define WD_RST 8
	86	#define WD_OFF 0
	87
	88	//prescale values
	89	#define WDTO_15MS 0
	90	#define WDTO_30MS 1
	91	#define WDTO_60MS 2
	92	#define WDTO_120MS 3
	93	#define WDTO_250MS 4
	94	#define WDTO_500MS 5
	95	#define WDTO_1S 6
	96	#define WDTO_2S 7
	97
	98	//prescale values for avrs with WDP3
	99	#if defined(WDP3)
	100	#define WDTO_4S 0x20
	101	#define WDTO_8S 0x21
	102	#endif
	103
	104	//watchdog reset
	105	#define WDR() __asm__ __volatile__("wdr")
	106
	107	//avr reset using watchdog
	108	#define WD_AVR_RESET() do{ \
	109	__asm__ __volatile__("cli"); \
	110	WD_SET_UNSAFE(WD_RST); \
	111	while(1); \
	112	}while(0)
	113
	114	/*set the watchdog-
	115	1. save SREG
	116	2. turn off irq's
	117	3. reset watchdog timer
	118	4. enable watchdog change
	119	5. write watchdog value
	120	6. restore SREG (restoring irq status)
	121	*/
	122	#define WD_SET(val,...) \
	123	__asm__ __volatile__( \
	124	"in __tmp_reg__,__SREG__" "\n\t" \
	125	"cli" "\n\t" \
	126	"wdr" "\n\t" \
	127	"sts %[wdreg],%[wden]" "\n\t" \
	128	"sts %[wdreg],%[wdval]" "\n\t" \
	129	"out __SREG__,__tmp_reg__" "\n\t" \
	130	: \
	131	: [wdreg] "M" (&WDTCSR), \
	132	[wden] "r" ((uint8_t)(0x18)), \
	133	[wdval] "r" ((uint8_t)(val\|(__VA_ARGS__+0))) \
	134	: "r0" \
	135	)
	136
	137	/*set the watchdog when I bit in SREG known to be clear-
	138	1. reset watchdog timer
	139	2. enable watchdog change
	140	5. write watchdog value
	141	*/
	142	#define WD_SET_UNSAFE(val,...) \
	143	__asm__ __volatile__( \
	144	"wdr" "\n\t" \
	145	"sts %[wdreg],%[wden]" "\n\t" \
	146	"sts %[wdreg],%[wdval]" "\n\t" \
	147	: \
	148	: [wdreg] "M" (&WDTCSR), \
	149	[wden] "r" ((uint8_t)(0x18)), \
	150	[wdval] "r" ((uint8_t)(val\|(__VA_ARGS__+0))) \
	151	)
	152
	153
	154	//for compatibility with avr/wdt.h
	155	#define wdt_enable(val) WD_SET(WD_RST,val)
	156	#define wdt_disable() WD_SET(WD_OFF)
	157
	158
	159	#endif /* _AVR_WD_H_ */