98:ds18b20.h     **** 
  99:ds18b20.h     **** 
 100:ds18b20.h     **** /*------------------------------------------------------- 
 101:ds18b20.h     **** *  配置(使能)AVR與DS18B20的接口 
 102:ds18b20.h     **** */ 
 103:ds18b20.h     **** void ds18b20_config(void) 
 104:ds18b20.h     **** { 
 144               	.LM8:
 145               	/* prologue: frame size=0 */
 146               	/* prologue end (size=0) */
 105:ds18b20.h     ****     DDRD  &= ~DQ_18B20;   // 輸入模式(上電時為高電平) 
 148               	.LM9:
 149 0024 8B98      		cbi 49-0x20,3
 106:ds18b20.h     ****     PORTD &= ~DQ_18B20;   // 輸出鎖存器寫0，以后不再更改 
 151               	.LM10:
 152 0026 9398      		cbi 50-0x20,3
 153               	/* epilogue: frame size=0 */
 154 0028 0895      		ret
 155               	/* epilogue end (size=1) */
 156               	/* function ds18b20_config size 3 (2) */
 158               	.Lscope2:
 160               	.global	ds18b20_reset
 162               	ds18b20_reset:
 107:ds18b20.h     **** } 
 108:ds18b20.h     **** 
 109:ds18b20.h     **** /*------------------------------------------------------- 
 110:ds18b20.h     **** *    復位1-wire總線，并探測是否有溫度芯片DS18B20(TO-92 
 111:ds18b20.h     **** *  封裝)掛在總線上，有返回SUCC，沒有返回FAIL 
 112:ds18b20.h     **** */ 
 113:ds18b20.h     **** unsigned char ds18b20_reset(void) 
 114:ds18b20.h     **** { 
 164               	.LM11:
 165               	/* prologue: frame size=0 */
 166               	/* prologue end (size=0) */
 115:ds18b20.h     ****     unsigned char bus_flag; 
 116:ds18b20.h     **** 
 117:ds18b20.h     ****     DQ_TO_0();      // 設置1-wire總線為低電平(占領總線)... 
 168               	.LM12:
 169 002a 8B9A      		sbi 49-0x20,3
 170               	.LBB2:
 172               	.Ltext3:
   1:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /* Copyright (c) 2002, Marek Michalkiewicz
   2:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    Copyright (c) 2004, Joerg Wunsch
   3:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    All rights reserved.
   4:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
   5:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    Redistribution and use in source and binary forms, with or without
   6:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    modification, are permitted provided that the following conditions are met:
   7:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
   8:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    * Redistributions of source code must retain the above copyright
   9:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      notice, this list of conditions and the following disclaimer.
  10:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  11:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    * Redistributions in binary form must reproduce the above copyright
  12:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      notice, this list of conditions and the following disclaimer in
  13:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      the documentation and/or other materials provided with the
  14:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      distribution.
  15:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  16:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    * Neither the name of the copyright holders nor the names of
  17:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      contributors may be used to endorse or promote products derived
  18:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****      from this software without specific prior written permission.
  19:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  20:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****   POSSIBILITY OF SUCH DAMAGE. */
  31:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  32:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /* $Id: delay.h,v 1.9 2004/12/22 10:16:54 joerg_wunsch Exp $ */
  33:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  34:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /*
  35:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****    avr/delay.h - loops for small accurate delays
  36:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****  */
  37:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  38:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** #ifndef _AVR_DELAY_H_
  39:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** #define _AVR_DELAY_H_ 1
  40:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  41:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** #include <inttypes.h>
  42:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  43:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /** \defgroup avr_delay Busy-wait delay loops
  44:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     \code
  45:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     #define F_CPU 1000000UL  // 1 MHz
  46:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     //#define F_CPU 14.7456E6
  47:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     #include <avr/delay.h>
  48:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     \endcode
  49:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  50:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     The functions in this header file implement simple delay loops
  51:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     that perform a busy-waiting.  They are typically used to
  52:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     facilitate short delays in the program execution.  They are
  53:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     implemented as count-down loops with a well-known CPU cycle
  54:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     count per loop iteration.  As such, no other processing can
  55:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     occur simultaneously.  It should be kept in mind that the
  56:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     functions described here do not disable interrupts.
  57:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  58:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     In general, for long delays, the use of hardware timers is
  59:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     much preferrable, as they free the CPU, and allow for
  60:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     concurrent processing of other events while the timer is
  61:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     running.  However, in particular for very short delays, the
  62:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     overhead of setting up a hardware timer is too much compared
  63:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     to the overall delay time.
  64:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  65:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Two inline functions are provided for the actual delay algorithms.
  66:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  67:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Two wrapper functions allow the specification of microsecond, and
  68:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     millisecond delays directly, using the application-supplied macro
  69:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     F_CPU as the CPU clock frequency (in Hertz).  These functions
  70:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     operate on double typed arguments, however when optimization is
  71:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     turned on, the entire floating-point calculation will be done at
  72:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     compile-time.
  73:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** */
  74:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  75:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /** \ingroup avr_delay
  76:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  77:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Delay loop using an 8-bit counter \c __count, so up to 256
  78:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     iterations are possible.  (The value 256 would have to be passed
  79:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     as 0.)  The loop executes three CPU cycles per iteration, not
  80:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     including the overhead the compiler needs to setup the counter
  81:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     register.
  82:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  83:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Thus, at a CPU speed of 1 MHz, delays of up to 768 microseconds
  84:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     can be achieved.
  85:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** */
  86:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** static __inline__ void
  87:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** _delay_loop_1(uint8_t __count)
  88:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** {
  89:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 	__asm__ volatile (
  90:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 		"1: dec %0" "\n\t"
  91:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 		"brne 1b"
  92:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 		: "=r" (__count)
  93:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 		: "0" (__count)
  94:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 	);
  95:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** }
  96:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  97:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** /** \ingroup avr_delay
  98:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
  99:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Delay loop using a 16-bit counter \c __count, so up to 65536
 100:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     iterations are possible.  (The value 65536 would have to be
 101:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     passed as 0.)  The loop executes four CPU cycles per iteration,
 102:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     not including the overhead the compiler requires to setup the
 103:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     counter register pair.
 104:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 
 105:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     Thus, at a CPU speed of 1 MHz, delays of up to about 262.1
 106:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****     milliseconds can be achieved.
 107:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h ****  */
 108:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** static __inline__ void
 109:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** _delay_loop_2(uint16_t __count)
 110:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** {
 174               	.LM13:
 175 002c 83E7      		ldi r24,lo8(1907)
 176 002e 97E0      		ldi r25,hi8(1907)
 177               	.LBB3:
 111:d:/WinAVR/bin/../lib/gcc/avr/3.4.3/../../../../avr/include/avr/delay.h **** 	__asm__ volatile (
 179               	.LM14:
 180               	/* #APP */
 181 0030 0197      		1: sbiw r24,1
 182 0032 F1F7      		brne 1b
 183               	/* #NOAPP */
 184               	.LBE3:
 185               	.LBE2:
 187               	.Ltext4:
 118:ds18b20.h     **** 
 119:ds18b20.h     ****     /* 現在延遲480us~960us, 與硬件密切相關，但應盡可能選小值(480us)， 
 120:ds18b20.h     ****        把抖動留給系統(比如在延遲期間發生中斷導致延遲變長)。 
 121:ds18b20.h     ****      */ 
 122:ds18b20.h     ****     wait_us(690);   // 490us 
 123:ds18b20.h     **** 
 124:ds18b20.h     ****     cli();          // 下面這段時間要求比較嚴格，為保險起見，關中斷 
 189               	.LM15:
 190               	/* #APP */
 191 0034 F894      		cli
 125:ds18b20.h     ****     DQ_TO_1();      // 設置1-wire總線為高電平(釋放總線) 
 193               	.LM16:
 194               	/* #NOAPP */
 195 0036 8B98      		cbi 49-0x20,3
 196               	.LBB4:
 198               	.Ltext5:
 200               	.LM17:
 201 0038 81EF      		ldi r24,lo8(241)
 202 003a 90E0      		ldi r25,hi8(241)
 203               	.LBB5:
 205               	.LM18:
 206               	/* #APP */
 207 003c 0197      		1: sbiw r24,1
 208 003e F1F7      		brne 1b
 209               	/* #NOAPP */
 210               	.LBE5:
 211               	.LBE4:
 213               	.Ltext6:
 126:ds18b20.h     ****      
 127:ds18b20.h     ****     /* 這個浮點數是由編譯器計算好的，而不是由你的MCU在運行時臨時計算的， 
 128:ds18b20.h     ****        所以不會占用用戶MCU的時間，不必擔心(看看前面的宏你就可以確定了) 
 129:ds18b20.h     ****      */ 
 130:ds18b20.h     ****     wait_us(87.5);  // 最佳時間: 60us+7.5us!(忙延時，只是一種策略) 
 131:ds18b20.h     ****      
 132:ds18b20.h     ****     // 探測總線上是否有器件     
 133:ds18b20.h     ****     if(DQ_status()) bus_flag=FAIL;   // 復位單總線但沒有發現有器件在線 
 215               	.LM19:
 216 0040 839B      		sbis 48-0x20,3
 217 0042 02C0      		rjmp .L38
 219               	.LM20:
 220 0044 20E0      		ldi r18,lo8(0)
 221 0046 01C0      		rjmp .L39
 222               	.L38:
 134:ds18b20.h     ****     else bus_flag=SUCC;              // 復位單總線并發現有器件在線 
 224               	.LM21:
 225 0048 21E0      		ldi r18,lo8(1)
 226               	.L39:
 135:ds18b20.h     ****      
 136:ds18b20.h     ****     sei();          // 退出臨界代碼區(開中斷) 
 228               	.LM22:
 229               	/* #APP */
 230 004a 7894      		sei
 231               	/* #NOAPP */
 232               	.LBB6:
 234               	.Ltext7:
 236               	.LM23:
 237 004c 81E8      		ldi r24,lo8(1665)
 238 004e 96E0      		ldi r25,hi8(1665)
 239               	.LBB7:
 241               	.LM24:
 242               	/* #APP */
 243 0050 0197      		1: sbiw r24,1
 244 0052 F1F7      		brne 1b
 245               	/* #NOAPP */
 246               	.LBE7:
 247               	.LBE6:
 249               	.Ltext8:
 137:ds18b20.h     **** 
 138:ds18b20.h     ****     /* 保證Master釋放總線的時間(不是說總線處于高電平的時間)不小于 
 139:ds18b20.h     ****        480us即可，這一時間從讀總線狀態之前就開始了，所以這里把這個 
 140:ds18b20.h     ****        時間計算在內。在Master釋放總線的前半段，也是被動器件聲明它 
 141:ds18b20.h     ****        們在線之時。 
 142:ds18b20.h     ****      */ 
 143:ds18b20.h     ****     wait_us(690-87.5);   // 490-67.5us 
 144:ds18b20.h     **** 
 145:ds18b20.h     ****     return(bus_flag); 
 146:ds18b20.h     **** } 
 251               	.LM25:
 252 0054 822F      		mov r24,r18