Component: One Wire (DS2482) (Comms: Interface): Difference between revisions
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| width="90%" | | 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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| width="90%" | | 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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| width="90%" | | 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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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Initialise''' | ||
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| colspan="2" | | | colspan="2" | | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''MatchROM''' | ||
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| 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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| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | 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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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''ScanBus''' | ||
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| 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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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''SkipROM''' | ||
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| 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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| width="90%" | | 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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| width="90%" | | 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 | ||
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| width="10%" align="center" | | width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]] | ||
| width="90%" | | width="90%" class="mtx-class-propfolder" | I2C Properties | ||
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| colspan="2" | | | colspan="2" | | ||
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| width="10%" align="center" | | width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]] | ||
| width="90%" | | 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) | ||
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| width="10%" align="center" | | width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]] | ||
| width="90%" | | width="90%" class="mtx-class-propfolder" | Options | ||
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| colspan="2" | Baud rate to be used | | colspan="2" | Baud rate to be used | ||
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| width="10%" align="center" | | width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]] | ||
| width="90%" | | width="90%" class="mtx-class-propfolder" | Simulation | ||
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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 |