?? owiswbitfunctions.lst
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##############################################################################
# #
# IAR Atmel AVR C/EC++ Compiler V3.20A/W32 19/Aug/2004 16:08:04 #
# Copyright 1996-2004 IAR Systems. All rights reserved. #
# #
# Source file = Z:\qvcs\AVR318 Dallas 1-wire Communication #
# Interface\Source Code\IAR\polled\OWISWBitFunctions.c #
# Command line = --cpu=m32 -ms -o "Z:\qvcs\AVR318 Dallas 1-wire #
# Communication Interface\Source #
# Code\IAR\polled\Debug\Obj\" -lC "Z:\qvcs\AVR318 Dallas #
# 1-wire Communication Interface\Source #
# Code\IAR\polled\Debug\List\" -lA "Z:\qvcs\AVR318 #
# Dallas 1-wire Communication Interface\Source #
# Code\IAR\polled\Debug\List\" --initializers_in_flash #
# --root_variables -z2 --no_cse --no_inline #
# --no_code_motion --no_cross_call --no_clustering #
# --debug -DENABLE_BIT_DEFINITIONS -e -I "C:\Program #
# Files\IAR Systems\Embedded Workbench 3.2\avr\INC\" -I #
# "C:\Program Files\IAR Systems\Embedded Workbench #
# 3.2\avr\INC\CLIB\" --eeprom_size 1024 "Z:\qvcs\AVR318 #
# Dallas 1-wire Communication Interface\Source #
# Code\IAR\polled\OWISWBitFunctions.c" #
# List file = Z:\qvcs\AVR318 Dallas 1-wire Communication #
# Interface\Source Code\IAR\polled\Debug\List\OWISWBitFun #
# ctions.lst #
# Object file = Z:\qvcs\AVR318 Dallas 1-wire Communication #
# Interface\Source Code\IAR\polled\Debug\Obj\OWISWBitFunc #
# tions.r90 #
# #
# #
##############################################################################
Z:\qvcs\AVR318 Dallas 1-wire Communication Interface\Source Code\IAR\polled\OWISWBitFunctions.c
1 // This file has been prepared for Doxygen automatic documentation generation.
2 /*! \file ********************************************************************
3 *
4 * Atmel Corporation
5 *
6 * \li File: OWISWBitFunctions.c
7 * \li Compiler: IAR EWAAVR 3.20a
8 * \li Support mail: avr@atmel.com
9 *
10 * \li Supported devices: All AVRs.
11 *
12 * \li Application Note: AVR318 - Dallas 1-Wire(R) master.
13 *
14 *
15 * \li Description: Polled software only implementation of the basic
16 * bit-level signalling in the 1-Wire(R) protocol.
17 *
18 * $Revision: 1.6 $
19 * $Date: Thursday, August 19, 2004 09:02:02 UTC $
20 ****************************************************************************/
21
22 #include "OWIPolled.h"
23
24 #ifdef OWI_SOFTWARE_DRIVER
25
26 #include <ioavr.h>
27 #include <inavr.h>
28
29 #include "OWIBitFunctions.h"
30
31
32 /*! \brief Initialization of the one wire bus(es). (Software only driver)
33 *
34 * This function initializes the 1-Wire bus(es) by releasing it and
35 * waiting until any presence sinals are finished.
36 *
37 * \param pins A bitmask of the buses to initialize.
38 */
\ In segment CODE, align 2, keep-with-next
39 void OWI_Init(unsigned char pins)
\ OWI_Init:
40 {
41 OWI_RELEASE_BUS(pins);
\ 00000000 2F10 MOV R17,R16
\ 00000002 9510 COM R17
\ 00000004 B321 IN R18,0x11
\ 00000006 2321 AND R18,R17
\ 00000008 BB21 OUT 0x11,R18
\ 0000000A B312 IN R17,0x12
\ 0000000C 2B10 OR R17,R16
\ 0000000E BB12 OUT 0x12,R17
42 // The first rising edge can be interpreted by a slave as the end of a
43 // Reset pulse. Delay for the required reset recovery time (H) to be
44 // sure that the real reset is interpreted correctly.
45 __delay_cycles(OWI_DELAY_H_STD_MODE);
\ 00000010 EB2C LDI R18,188
\ 00000012 E033 LDI R19,3
\ 00000014 5021 SUBI R18,1
\ 00000016 4030 SBCI R19,0
\ 00000018 F7E9 BRNE $-4
\ 0000001A C000 RJMP $+2
46 }
\ 0000001C 9508 RET
47
48
49 /*! \brief Write a '1' bit to the bus(es). (Software only driver)
50 *
51 * Generates the waveform for transmission of a '1' bit on the 1-Wire
52 * bus.
53 *
54 * \param pins A bitmask of the buses to write to.
55 */
\ In segment CODE, align 2, keep-with-next
56 void OWI_WriteBit1(unsigned char pins)
\ OWI_WriteBit1:
57 {
58 unsigned char intState;
59
60 // Disable interrupts.
61 intState = __save_interrupt();
\ 00000000 B72F IN R18,0x3F
\ 00000002 2F12 MOV R17,R18
62 __disable_interrupt();
\ 00000004 94F8 CLI
63
64 // Drive bus low and delay.
65 OWI_PULL_BUS_LOW(pins);
\ 00000006 B321 IN R18,0x11
\ 00000008 2B20 OR R18,R16
\ 0000000A BB21 OUT 0x11,R18
\ 0000000C 2F20 MOV R18,R16
\ 0000000E 9520 COM R18
\ 00000010 B332 IN R19,0x12
\ 00000012 2332 AND R19,R18
\ 00000014 BB32 OUT 0x12,R19
66 __delay_cycles(OWI_DELAY_A_STD_MODE);
\ 00000016 E02B LDI R18,11
\ 00000018 952A DEC R18
\ 0000001A F7F1 BRNE $-2
\ 0000001C C000 RJMP $+2
67
68 // Release bus and delay.
69 OWI_RELEASE_BUS(pins);
\ 0000001E 2F20 MOV R18,R16
\ 00000020 9520 COM R18
\ 00000022 B331 IN R19,0x11
\ 00000024 2332 AND R19,R18
\ 00000026 BB31 OUT 0x11,R19
\ 00000028 B322 IN R18,0x12
\ 0000002A 2B20 OR R18,R16
\ 0000002C BB22 OUT 0x12,R18
70 __delay_cycles(OWI_DELAY_B_STD_MODE);
\ 0000002E EA26 LDI R18,166
\ 00000030 952A DEC R18
\ 00000032 F7F1 BRNE $-2
\ 00000034 0000 NOP
71
72 // Restore interrupts.
73 __restore_interrupt(intState);
\ 00000036 BF1F OUT 0x3F,R17
74 }
\ 00000038 9508 RET
75
76
77 /*! \brief Write a '0' to the bus(es). (Software only driver)
78 *
79 * Generates the waveform for transmission of a '0' bit on the 1-Wire(R)
80 * bus.
81 *
82 * \param pins A bitmask of the buses to write to.
83 */
\ In segment CODE, align 2, keep-with-next
84 void OWI_WriteBit0(unsigned char pins)
\ OWI_WriteBit0:
85 {
86 unsigned char intState;
87
88 // Disable interrupts.
89 intState = __save_interrupt();
\ 00000000 B72F IN R18,0x3F
\ 00000002 2F12 MOV R17,R18
90 __disable_interrupt();
\ 00000004 94F8 CLI
91
92 // Drive bus low and delay.
93 OWI_PULL_BUS_LOW(pins);
\ 00000006 B321 IN R18,0x11
\ 00000008 2B20 OR R18,R16
\ 0000000A BB21 OUT 0x11,R18
\ 0000000C 2F20 MOV R18,R16
\ 0000000E 9520 COM R18
\ 00000010 B332 IN R19,0x12
\ 00000012 2332 AND R19,R18
\ 00000014 BB32 OUT 0x12,R19
94 __delay_cycles(OWI_DELAY_C_STD_MODE);
\ 00000016 E92B LDI R18,155
\ 00000018 952A DEC R18
\ 0000001A F7F1 BRNE $-2
\ 0000001C C000 RJMP $+2
95
96 // Release bus and delay.
97 OWI_RELEASE_BUS(pins);
\ 0000001E 2F20 MOV R18,R16
\ 00000020 9520 COM R18
\ 00000022 B331 IN R19,0x11
\ 00000024 2332 AND R19,R18
\ 00000026 BB31 OUT 0x11,R19
\ 00000028 B322 IN R18,0x12
\ 0000002A 2B20 OR R18,R16
\ 0000002C BB22 OUT 0x12,R18
98 __delay_cycles(OWI_DELAY_D_STD_MODE);
\ 0000002E E126 LDI R18,22
\ 00000030 952A DEC R18
\ 00000032 F7F1 BRNE $-2
\ 00000034 0000 NOP
99
100 // Restore interrupts.
101 __restore_interrupt(intState);
\ 00000036 BF1F OUT 0x3F,R17
102 }
\ 00000038 9508 RET
103
104
105 /*! \brief Read a bit from the bus(es). (Software only driver)
106 *
107 * Generates the waveform for reception of a bit on the 1-Wire(R) bus(es).
108 *
109 * \param pins A bitmask of the bus(es) to read from.
110 *
111 * \return A bitmask of the buses where a '1' was read.
112 */
\ In segment CODE, align 2, keep-with-next
113 unsigned char OWI_ReadBit(unsigned char pins)
\ OWI_ReadBit:
114 {
\ 00000000 2F10 MOV R17,R16
115 unsigned char intState;
116 unsigned char bitsRead;
117
118 // Disable interrupts.
119 intState = __save_interrupt();
\ 00000002 B73F IN R19,0x3F
\ 00000004 2F23 MOV R18,R19
120 __disable_interrupt();
\ 00000006 94F8 CLI
121
122 // Drive bus low and delay.
123 OWI_PULL_BUS_LOW(pins);
\ 00000008 B331 IN R19,0x11
\ 0000000A 2B31 OR R19,R17
\ 0000000C BB31 OUT 0x11,R19
\ 0000000E 2F31 MOV R19,R17
\ 00000010 9530 COM R19
\ 00000012 B342 IN R20,0x12
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