?? main.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\main.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\main.c" #
# List file = Z:\qvcs\AVR318 Dallas 1-wire Communication #
# Interface\Source Code\IAR\polled\Debug\List\main.lst #
# Object file = Z:\qvcs\AVR318 Dallas 1-wire Communication #
# Interface\Source Code\IAR\polled\Debug\Obj\main.r90 #
# #
# #
##############################################################################
Z:\qvcs\AVR318 Dallas 1-wire Communication Interface\Source Code\IAR\polled\main.c
1 // This file has been prepared for Doxygen automatic documentation generation.
2 /*! \file ********************************************************************
3 *
4 * Atmel Corporation
5 *
6 * \li File: main.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: Example on how to use the 1-Wire(R) interface
16 * master.
17 *
18 * $Revision: 1.6 $
19 * $Date: Thursday, August 19, 2004 09:02:02 UTC $
20 ****************************************************************************/
21
22 #include <ioavr.h>
23 #include <inavr.h>
24
25 #include "OWIPolled.h"
26 #include "OWIHighLevelFunctions.h"
27 #include "OWIBitFunctions.h"
28 #include "..\common_files\OWIcrc.h"
29
30 #include <string.h> // Used for memcpy.
31
32
33 // Defines used only in code example.
34 #define DS1820_FAMILY_ID 0x10
35 #define DS1820_START_CONVERSION 0x44
36 #define DS1820_READ_SCRATCHPAD 0xbe
37 #define DS1820_ERROR -1000 // Return code. Outside temperature range.
38
39 #define DS2890_FAMILY_ID 0x2c
40 #define DS2890_WRITE_CONTROL_REGISTER 0X55
41 #define DS2890_RELEASE_CODE 0x96
42 #define DS2890_WRITE_POSITION 0x0f
43
44 #define SEARCH_SUCCESSFUL 0x00
45 #define SEARCH_CRC_ERROR 0x01
46
47 #define FALSE 0
48 #define TRUE 1
49
50 #define MAX_DEVICES 8 //!< Max number of devices to search for.
51
52 #define BUSES (OWI_PIN_0 | OWI_PIN_1) //!< Buses to search.
53
54
55 /*! \brief Data type used to hold information about slave devices.
56 *
57 * The OWI_device data type holds information about what bus each device
58 * is connected to, and its 64 bit identifier.
59 */
60 typedef struct
61 {
62 unsigned char bus; //!< A bitmask of the bus the device is connected to.
63 unsigned char id[8]; //!< The 64 bit identifier.
64 } OWI_device;
65
66
67 // Prototypes of functions used in exemples.
68 unsigned char SearchBuses(OWI_device * devices, unsigned char len, unsigned char buses);
69 OWI_device * FindFamily(unsigned char familyID, OWI_device * devices, unsigned char size);
70 signed int DS1820_ReadTemperature(unsigned char bus, unsigned char * id);
71 void DS2890_SetWiperPosition(unsigned char position, unsigned char bus, unsigned char * id);
72
73
74 /*! \brief Example application for the polled drivers.
75 *
76 * Example application for the software only and polled UART driver.
77 * This example application will find all devices (upper bounded by MAX_DEVICES)
78 * on the buses defined by BUSES. It then tries to find either a DS1820 or DS2890
79 * device on a bus, and communicate with them to read temperature (DS1820) or
80 * set wiper position (DS2890).
81 * This example is not written in a very optimal way. It is merely intended to show
82 * how the polled 1-Wire(R) driver can be used.
83 */
\ In segment CODE, align 2, keep-with-next
84 void main(void)
\ main:
85 {
\ 00000000 ........ CALL ?PROLOGUE7_L09
\ 00000004 REQUIRE ?Register_R4_is_cg_reg
\ 00000004 REQUIRE ?Register_R5_is_cg_reg
\ 00000004 REQUIRE ?Register_R6_is_cg_reg
86 static OWI_device devices[MAX_DEVICES];
87 OWI_device * ds1820;
88 OWI_device * ds2890;
89 signed int temperature = 0;
\ 00000004 2444 CLR R4
\ 00000006 2455 CLR R5
90 unsigned char wiperPos = 0;
\ 00000008 2466 CLR R6
91
92 // Initialize PORTB as output. Can be used to display values on
93 // the LEDs on a STK500 development board.
94 DDRB = 0xff;
\ 0000000A EF0F LDI R16,255
\ 0000000C BB07 OUT 0x17,R16
95
96 OWI_Init(BUSES);
\ 0000000E E003 LDI R16,3
\ 00000010 ........ CALL OWI_Init
97
98 // Do the bus search until all ids are read without crc error.
99 while(SearchBuses(devices, MAX_DEVICES, BUSES) != SEARCH_SUCCESSFUL)
\ ??main_0:
\ 00000014 E033 LDI R19,3
\ 00000016 E028 LDI R18,8
\ 00000018 .... LDI R16,LOW(??devices)
\ 0000001A .... LDI R17,(??devices) >> 8
\ 0000001C .... RCALL SearchBuses
\ 0000001E 2300 TST R16
\ 00000020 F7C9 BRNE ??main_0
100 {
101
102 }
103
104 // See if there is a DS1820 or DS2890 on a bus.
105 ds1820 = FindFamily(DS1820_FAMILY_ID, devices, MAX_DEVICES);
\ 00000022 E018 LDI R17,8
\ 00000024 .... LDI R18,LOW(??devices)
\ 00000026 .... LDI R19,(??devices) >> 8
\ 00000028 E100 LDI R16,16
\ 0000002A .... RCALL FindFamily
\ 0000002C 01C8 MOVW R25 : R24,R17 : R16
106 ds2890 = FindFamily(DS2890_FAMILY_ID, devices, MAX_DEVICES);
\ 0000002E E018 LDI R17,8
\ 00000030 .... LDI R18,LOW(??devices)
\ 00000032 .... LDI R19,(??devices) >> 8
\ 00000034 E20C LDI R16,44
\ 00000036 .... RCALL FindFamily
\ 00000038 01D8 MOVW R27 : R26,R17 : R16
107
108 // Do something useful with the slave devices in an eternal loop.
109 for (;;)
110 {
111 // If there is a DS1820 temperature sensor on a bus, read the
112 // temperature.
113 // The DS1820 must have Vdd pin connected for this code to work.
114 if (ds1820 != NULL)
\ ??main_1:
\ 0000003A 2F08 MOV R16,R24
\ 0000003C 2B09 OR R16,R25
\ 0000003E F039 BREQ ??main_2
115 {
116 temperature = DS1820_ReadTemperature((*ds1820).bus, (*ds1820).id);
\ 00000040 019C MOVW R19 : R18,R25 : R24
\ 00000042 5F2F SUBI R18,255
\ 00000044 4F3F SBCI R19,255
\ 00000046 01FC MOVW R31 : R30,R25 : R24
\ 00000048 8100 LD R16,Z
\ 0000004A .... RCALL DS1820_ReadTemperature
\ 0000004C 0128 MOVW R5 : R4,R17 : R16
117 }
118 // If there is a DS2890 digital potentiometer, increment the
119 // wiper value.
120 if (ds2890 != NULL)
\ ??main_2:
\ 0000004E 2F0A MOV R16,R26
\ 00000050 2B0B OR R16,R27
\ 00000052 F039 BREQ ??main_3
121 {
122 DS2890_SetWiperPosition(wiperPos++, (*ds2890).bus, (*ds2890).id);
\ 00000054 019D MOVW R19 : R18,R27 : R26
\ 00000056 5F2F SUBI R18,255
\ 00000058 4F3F SBCI R19,255
\ 0000005A 911C LD R17,X
\ 0000005C 2D06 MOV R16,R6
\ 0000005E .... RCALL DS2890_SetWiperPosition
\ 00000060 9463 INC R6
123 }
124
125 // Discard lsb of temperature and output to PORTB.
126 PORTB = ~(temperature >> 1);
\ ??main_3:
\ 00000062 0182 MOVW R17 : R16,R5 : R4
\ 00000064 9515 ASR R17
\ 00000066 9507 ROR R16
\ 00000068 9500 COM R16
\ 0000006A BB08 OUT 0x18,R16
\ 0000006C CFE6 RJMP ??main_1
127 }
128 }
\ In segment NEAR_Z, align 1, keep-with-next, root
\ 00000000 REQUIRE `?<Segment init: NEAR_Z>`
\ ??devices:
\ 00000000 DS 72
129
130
131 /*! \brief Perform a 1-Wire search
132 *
133 * This function shows how the OWI_SearchRom function can be used to
134 * discover all slaves on the bus. It will also CRC check the 64 bit
135 * identifiers.
136 *
137 * \param devices Pointer to an array of type OWI_device. The discovered
138 * devices will be placed from the beginning of this array.
139 *
140 * \param len The length of the device array. (Max. number of elements).
141 *
142 * \param buses Bitmask of the buses to perform search on.
143 *
144 * \retval SEARCH_SUCCESSFUL Search completed successfully.
145 * \retval SEARCH_CRC_ERROR A CRC error occured. Probably because of noise
146 * during transmission.
147 */
\ In segment CODE, align 2, keep-with-next
148 unsigned char SearchBuses(OWI_device * devices, unsigned char len, unsigned char buses)
\ SearchBuses:
149 {
\ 00000000 ........ CALL ?PROLOGUE15_L09
\ 00000004 REQUIRE ?Register_R4_is_cg_reg
\ 00000004 REQUIRE ?Register_R5_is_cg_reg
\ 00000004 REQUIRE ?Register_R6_is_cg_reg
\ 00000004 REQUIRE ?Register_R7_is_cg_reg
\ 00000004 REQUIRE ?Register_R8_is_cg_reg
\ 00000004 REQUIRE ?Register_R9_is_cg_reg
\ 00000004 REQUIRE ?Register_R10_is_cg_reg
\ 00000004 REQUIRE ?Register_R11_is_cg_reg
\ 00000004 REQUIRE ?Register_R12_is_cg_reg
\ 00000004 REQUIRE ?Register_R13_is_cg_reg
\ 00000004 REQUIRE ?Register_R14_is_cg_reg
\ 00000004 01C8 MOVW R25 : R24,R17 : R16
\ 00000006 2ED2 MOV R13,R18
150 unsigned char i, j;
151 unsigned char presence;
152 unsigned char * newID;
153 unsigned char * currentID;
154 unsigned char currentBus;
155 unsigned char lastDeviation;
156 unsigned char numDevices;
157
158 // Initialize all addresses as zero, on bus 0 (does not exist).
159 // Do a search on the bus to discover all addresses.
160 for (i = 0; i < len; i++)
\ 00000008 E0B0 LDI R27,0
\ ??SearchBuses_0:
\ 0000000A 15BD CP R27,R13
\ 0000000C F520 BRCC ??SearchBuses_1
161 {
162 devices[i].bus = 0x00;
\ 0000000E E000 LDI R16,0
\ 00000010 2E90 MOV R9,R16
\ 00000012 2F4B MOV R20,R27
\ 00000014 E050 LDI R21,0
\ 00000016 E009 LDI R16,9
\ 00000018 E010 LDI R17,0
\ 0000001A ........ CALL ?S_EC_MUL_L02
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