Component: Digital Potentiometer (MCP44XX) (Analog Output): Difference between revisions
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| colspan="2" | 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. | | colspan="2" | 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. | ||
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Latest revision as of 14:36, 13 July 2026
| Author | Matrix TSL |
| Version | 1.0 |
| Category | Analog Output |
Digital Potentiometer (MCP44XX) component
The MCP44XX device range supports 4 digital potentiometers or rheostat outputs. 129 or 257 possible output resistance values for each channel.
Component Source Code
Please click here to download the component source project: FC_Comp_Source_MCP44xx_Digital_Pot.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_MCP44xx_Digital_Pot.fcfx
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Macro reference
DecrementWiper
|
DecrementWiper |
| Decrements a single volatile wiper value | |
 - BYTE
|
Index |
| Range: 0-3 | |
 - VOID
|
Return |
IncrementWiper
|
|
IncrementWiper |
| Increments a single volatile wiper value | |
| - BYTE
|
Index |
| Range: 0-3 | |
| - VOID
|
Return |
Initialise
|
|
Initialise |
| Startup the I2C peripheral ready for communications. | |
| - VOID
|
Return |
ReadAddress
|
|
ReadAddress |
| Reads a value from one of the registers on the device | |
| - BYTE
|
Address |
| Range: 0-15 | |
 - UINT
|
Return |
SetWiper
|
|
SetWiper |
| Sets the value of a single wiper | |
| - BYTE
|
Index |
| Range: 0-3 | |
| - UINT
|
Value |
| 129 Taps Range: 0-128 / 257 Taps Range: 0-256 | |
 - BOOL
|
MemoryType |
| 0=Volatile, 1=Nonvolatile | |
| - VOID
|
Return |
WriteAddress
|
|
WriteAddress |
| Writes a value to one of the registers on the device | |
| - BYTE
|
Address |
| Range: 0-15 | |
| - UINT
|
Value |
| Range: 0-256 | |
| - VOID
|
Return |
Property reference
|
Properties |
|
I2C Properties |
|
Channel |
| Channel selection | |
|
SDA |
| Pin used for SDA (data signal) | |
|
|
SCL |
| Pin used for SCL (clock signal) | |
|
|
Baud Select |
| Baud rate option selector | |
|
Baud Rate |
| Baud rate to be used | |
|
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. | |
|
|
Device Properties |
|
|
Number of Taps |
|
|
Address Bits |
|
|
Simulation |
|
|
Simulate Comms |