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===BusReset===
===BusReset===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''BusReset'''
| width="90%" class="mtx-class-macrohead" | '''BusReset'''
|-
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| colspan="2" | Issue a 'ping' on the bus. If there is at least one sensor on the bus then it will generate a presence pulse.  Returns 0 if a presense pulse was detected Returns 1 no device was detected 
| colspan="2" | Issue a 'ping' on the bus. If there is at least one sensor on the bus then it will generate a presence pulse.  Returns 0 if a presense pulse was detected Returns 1 no device was detected 
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===GetDeviceCount===
===GetDeviceCount===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''GetDeviceCount'''
| width="90%" class="mtx-class-macrohead" | '''GetDeviceCount'''
|-
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| colspan="2" | Returns the number of devices found by the last ScanBus operation. 
| colspan="2" | Returns the number of devices found by the last ScanBus operation. 
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===GetIDByte===
===GetIDByte===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''GetIDByte'''
| width="90%" class="mtx-class-macrohead" | '''GetIDByte'''
|-
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| colspan="2" | Returns byte ectet of the 64-Bit lasered ROM code, 255 on error 
| colspan="2" | Returns byte ectet of the 64-Bit lasered ROM code, 255 on error 
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===Initialise===
===Initialise===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
| width="90%" class="mtx-class-macrohead" | '''Initialise'''
|-
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| colspan="2" |  
| colspan="2" |  
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===MatchROM===
===MatchROM===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''MatchROM'''
| width="90%" class="mtx-class-macrohead" | '''MatchROM'''
|-
|-
| colspan="2" | Performs a reset followed by the MatchROM code and then the 8-bit ROM code. 
| colspan="2" | Performs a reset followed by the MatchROM code and then the 8-bit ROM code. 
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===ReceiveByte===
===ReceiveByte===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReceiveByte'''
| width="90%" class="mtx-class-macrohead" | '''ReceiveByte'''
|-
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| colspan="2" | Receives a byte from the one wire bus a bit at a time 
| colspan="2" | Receives a byte from the one wire bus a bit at a time 
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===ScanBus===
===ScanBus===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ScanBus'''
| width="90%" class="mtx-class-macrohead" | '''ScanBus'''
|-
|-
| colspan="2" | Scans the one wire bus to detect all connected devices. Returns the number of one wire devices found. 
| colspan="2" | Scans the one wire bus to detect all connected devices. Returns the number of one wire devices found. 
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===SkipROM===
===SkipROM===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''SkipROM'''
| width="90%" class="mtx-class-macrohead" | '''SkipROM'''
|-
|-
| colspan="2" | Performs a bus reset and the sends the SkipROM command byte 
| colspan="2" | Performs a bus reset and the sends the SkipROM command byte 
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===TransmitByte===
===TransmitByte===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''TransmitByte'''
| width="90%" class="mtx-class-macrohead" | '''TransmitByte'''
|-
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| colspan="2" | Transmit a byte to the one wire bus a bit at a time 
| colspan="2" | Transmit a byte to the one wire bus a bit at a time 
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==Property reference==
==Property reference==


{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
{| class="mtx-class-macrotable wikitable"
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| width="10%" align="center" style="background-color:#D8C9D8;" | [[File:Fc9-prop-icon.png]]
| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-prop-icon.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties'''  
| width="90%" class="mtx-class-macrohead" | '''Properties'''  
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| colspan="2" | Controls the maximum number of devices that can be detected during a ScanBus. For each additional device we require 8 bytes to store the ROM ID. Default: 8 = 64 Bytes of RAM 
| colspan="2" | Controls the maximum number of devices that can be detected during a ScanBus. For each additional device we require 8 bytes to store the ROM ID. Default: 8 = 64 Bytes of RAM 
|-
|-
| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | I2C Properties
| width="90%" class="mtx-class-propfolder" | I2C Properties
|-
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|-
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| colspan="2" |  
| colspan="2" |  
|-
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| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Connections
| width="90%" class="mtx-class-propfolder" | Connections
|-
|-
|-
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| colspan="2" | Pin used for SCL (clock signal) 
| colspan="2" | Pin used for SCL (clock signal) 
|-
|-
| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Options
| width="90%" class="mtx-class-propfolder" | Options
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|-
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| colspan="2" | Baud rate to be used 
| colspan="2" | Baud rate to be used 
|-
|-
| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Simulation
| width="90%" class="mtx-class-propfolder" | Simulation
|-
|-
|-
|-

Latest revision as of 14:36, 13 July 2026

Author MatrixTSL
Version 1.0
Category Comms: Interface


One Wire (DS2482) component

A One Wire master transciever controlled using I2C comms. Useful for microcontroller devices where One Wire communications timings are too tight to do reliably.

Component Source Code

Please click here to download the component source project: FC_Comp_Source_One_Wire_DS2482_I2C.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_One_Wire_DS2482_I2C.fcfx

Detailed description

No detailed description exists yet for this component

Examples

No additional examples






Macro reference

BusReset

BusReset
Issue a 'ping' on the bus. If there is at least one sensor on the bus then it will generate a presence pulse. Returns 0 if a presense pulse was detected Returns 1 no device was detected 
- BOOL Return


GetDeviceCount

GetDeviceCount
Returns the number of devices found by the last ScanBus operation. 
- BYTE Return


GetIDByte

GetIDByte
Returns byte ectet of the 64-Bit lasered ROM code, 255 on error 
- BYTE Device
Device ID - Range: 0 - NumDevices - 1 
- BYTE ByteIndex
Index of the data byte. 0=FamilyCode, 1-6=Serial, 7=CRC 
- BYTE Return


Initialise

Initialise
 
- VOID Return


MatchROM

MatchROM
Performs a reset followed by the MatchROM code and then the 8-bit ROM code. 
- BYTE FamilyCode
 
- BYTE SerialNumber
 
- VOID Return


ReceiveByte

ReceiveByte
Receives a byte from the one wire bus a bit at a time 
- BYTE Return


ScanBus

ScanBus
Scans the one wire bus to detect all connected devices. Returns the number of one wire devices found. 
- BYTE Return


SkipROM

SkipROM
Performs a bus reset and the sends the SkipROM command byte 
- VOID Return


TransmitByte

TransmitByte
Transmit a byte to the one wire bus a bit at a time 
- BYTE Command
 
- VOID Return


Property reference

Properties
Max Devices
Controls the maximum number of devices that can be detected during a ScanBus. For each additional device we require 8 bytes to store the ROM ID. Default: 8 = 64 Bytes of RAM 
I2C Properties
Device Address
 
Connections
Channel
Channel selection 
SDA
Pin used for SDA (data signal) 
SCL
Pin used for SCL (clock signal) 
Options
Stop Delay
On older microcontroller devices there is a potential for the I2C hardware channel to lock up if there is not a 10ms delay between an I2C stop event and the next I2C start event. Most modern microcontrollers will not have a problem so this property can be disabled to speed up the I2C communications.  
Baud Select
Baud rate option selector 
Baud Rate
Baud rate to be used 
Simulation
Simulate Comms
 
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