Component: Digital Potentiometer (MCP44XX) (Analog Output): Difference between revisions

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

@@ Line 17: / Line 17: @@
 ==Component Source Code==
-Please click here for the component source code: [https://www.flowcode.co.uk/wikicopy/componentsource/FC_Comp_Source_MCP44xx_Digital_Pot.fcfx FC_Comp_Source_MCP44xx_Digital_Pot.fcfx]
+Please click here to download the component source project: [https://www.flowcode.co.uk/wiki/componentsource/FC_Comp_Source_MCP44xx_Digital_Pot.fcfx FC_Comp_Source_MCP44xx_Digital_Pot.fcfx]
+Please click here to view the component source code (Beta): [https://www.flowcode.co.uk/FlowchartView/?wfile=componentsource/FC_Comp_Source_MCP44xx_Digital_Pot.fcfx FC_Comp_Source_MCP44xx_Digital_Pot.fcfx]
 ==Detailed description==
@@ Line 38: / Line 50: @@
 ==Examples==
@@ Line 57: / Line 79: @@
-==Downloadable macro reference==
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+==Macro reference==
+===DecrementWiper===
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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;" | '''IncrementWiper'''
+| width="90%" class="mtx-class-macrohead" | '''DecrementWiper'''
 |-
-| colspan="2" | Increments a single volatile wiper value&nbsp;
+| colspan="2" | Decrements a single volatile wiper value&nbsp;
 |-
 |-
@@ Line 77: / Line 110: @@
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+===IncrementWiper===
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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;" | '''DecrementWiper'''
+| width="90%" class="mtx-class-macrohead" | '''IncrementWiper'''
 |-
-| colspan="2" | Decrements a single volatile wiper value&nbsp;
+| colspan="2" | Increments a single volatile wiper value&nbsp;
 |-
 |-
@@ Line 95: / Line 129: @@
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+===Initialise===
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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;" | '''SetWiper'''
+| width="90%" class="mtx-class-macrohead" | '''Initialise'''
 |-
-| colspan="2" | Sets the value of a single wiper&nbsp;
+| colspan="2" | Startup the I2C peripheral ready for communications.&nbsp;
 |-
-|-
-| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
-| width="90%" | Index
-|-
-| colspan="2" | Range: 0-3&nbsp;
-|-
-| width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
-| width="90%" | Value
-|-
-| colspan="2" | 129 Taps Range: 0-128 / 257 Taps Range: 0-256&nbsp;
-|-
-| width="10%" align="center" | [[File:Fc9-bool-icon.png]] - BOOL
-| width="90%" | MemoryType
-|-
-| colspan="2" | 0=Volatile, 1=Nonvolatile&nbsp;
 |-
 | width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
@@ Line 123: / Line 143: @@
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+===ReadAddress===
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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;" | '''ReadAddress'''
+| width="90%" class="mtx-class-macrohead" | '''ReadAddress'''
 |-
 | colspan="2" | Reads a value from one of the registers on the device&nbsp;
@@ Line 141: / Line 162: @@
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+===SetWiper===
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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;" | '''WriteAddress'''
+| width="90%" class="mtx-class-macrohead" | '''SetWiper'''
 |-
-| colspan="2" | Writes a value to one of the registers on the device&nbsp;
+| colspan="2" | Sets the value of a single wiper&nbsp;
 |-
 |-
 | width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
-| width="90%" | Address
+| width="90%" | Index
 |-
-| colspan="2" | Range: 0-15&nbsp;
+| colspan="2" | Range: 0-3&nbsp;
 |-
 | width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
 | width="90%" | Value
 |-
-| colspan="2" | Range: 0-256&nbsp;
+| colspan="2" | 129 Taps Range: 0-128 / 257 Taps Range: 0-256&nbsp;
+|-
+| width="10%" align="center" | [[File:Fc9-bool-icon.png]] - BOOL
+| width="90%" | MemoryType
+|-
+| colspan="2" | 0=Volatile, 1=Nonvolatile&nbsp;
 |-
 | width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
@@ Line 164: / Line 191: @@
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+===WriteAddress===
+{| class="mtx-class-macrotable wikitable"
+|-
+| width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]]
+| width="90%" class="mtx-class-macrohead" | '''WriteAddress'''
 |-
-| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
+| colspan="2" | Writes a value to one of the registers on the device&nbsp;
-| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 |-
-| colspan="2" | Startup the I2C peripheral ready for communications.&nbsp;
 |-
+| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
+| width="90%" | Address
+|-
+| colspan="2" | Range: 0-15&nbsp;
+|-
+| width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
+| width="90%" | Value
+|-
+| colspan="2" | Range: 0-256&nbsp;
 |-
 | width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 | width="90%" style="border-top: 2px solid #000;" | ''Return''
 |}
 ==Property reference==
-{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
+{| class="mtx-class-macrotable wikitable"
 |-
-| 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'''
 |-
 |-
-| 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
 |-
 |-
@@ Line 221: / Line 257: @@
 | 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. &nbsp;
 |-
-| 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;" | Device Properties
+| width="90%" class="mtx-class-propfolder" | Device Properties
 |-
 |-
@@ Line 235: / Line 271: @@
 | colspan="2" | &nbsp;
 |-
-| 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
 |-
 |-

SteveT (talk | contribs)