Difference between revisions of "Component: IO Expander (PCF8575) (Comms: System)"

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{| style="width:50%"
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{| width="50%"
 
 
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| width="20%" style="color: gray;" | Author
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| width="20%" style="color:gray;" | Author
 
| Matrix TSL
 
| Matrix TSL
 
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|-
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| width="20%" style="color: gray;" | Version
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| width="20%" style="color:gray;" | Version
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| 1.0 (Release)
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| 1.0
 
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|-
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| width="20%" style="color: gray;" | Category
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| width="20%" style="color:gray;" | Category
 
| Comms: System
 
| Comms: System
 
|}
 
|}
  
  
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==IO Expander component==
 +
Provides 16 digital input/output pins arranged into 8-bit ports using a I2C bus connection. Up to eight expanders can be connected to the same I2C peripheral by means of three address pins. Supports the PCF8575 device allowing up to 8 expanders to be connected to the same I2C bus.
  
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==[[File:Component Icon 4616b658_531f_4c5e_981a_4d9fc04f9a36.png|Image]] IO Expander (PCF8575) component==
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==Component Pack==
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Provides 16 digital input/output pins arranged into 8-bit ports using a I2C bus connection.
 
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Up to eight expanders can be connected to the same I2C peripheral by means of three address pins.
 
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Supports the PCF8575 device allowing up to 8 expanders to be connected to the same I2C bus.
 
  
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==Examples==
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COMMSA
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''<span style="color:red;">No additional examples</span>''
 
  
 +
==Detailed description==
  
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==Downloadable macro reference==
 
  
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===<span style="font-weight: normal;"><u><tt>ReadPort</tt></u></span>===
 
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Reads the current input value of the I/O pins.
 
  
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'''Parameters'''
 
  
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:''This macro has no parameters''
 
  
  
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'''Return value'''
 
  
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:[[Variable Types|UINT]]
 
  
  
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===<span style="font-weight: normal;"><u><tt>WritePort</tt></u></span>===
 
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Writes an output value to the IO pins
 
  
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'''Parameters'''
 
  
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:[[Variable Types|UINT]] ''Value''
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''No detailed description exists yet for this component''
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::Value to write. Range 0-65535
 
  
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==Examples==
  
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'''Return value'''
 
  
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:''This call does not return a value''
 
  
  
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===<span style="font-weight: normal;"><u><tt>Initialise</tt></u></span>===
 
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''<span style="color:red;">No additional information</span>''
 
  
  
  
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'''Parameters'''
 
  
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:''This macro has no parameters''
 
  
  
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'''Return value'''
 
  
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:''This call does not return a value''
 
  
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''<span style="color:red;">No additional examples</span>''
  
  
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==Simulation macro reference==
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==Downloadable macro reference==
  
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''This component does not contain any simulation macros''
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{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
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|-
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadPort'''
 +
|-
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| colspan="2" | Reads the current input value of the I/O pins.&nbsp;
 +
|-
 +
|-
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| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u16-icon.png]] - UINT
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| width="90%" style="border-top: 2px solid #000;" | ''Return''
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|}
  
  
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==Property reference==
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{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
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<span style="font-weight: normal;"><u>Device Type</u></span>
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|-
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WritePort'''
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|-
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| colspan="2" | Writes an output value to the IO pins&nbsp;
 +
|-
 +
|-
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| width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
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| width="90%" | Value
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|-
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| colspan="2" | Value to write. Range 0-65535&nbsp;
 +
|-
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| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
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| width="90%" style="border-top: 2px solid #000;" | ''Return''
 +
|}
  
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This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''DeviceType''.
 
  
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''<span style="color:red;">No additional information</span>''
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{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 +
|-
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| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
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|-
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| colspan="2" | &nbsp;
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|-
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|-
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| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
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| width="90%" style="border-top: 2px solid #000;" | ''Return''
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|}
  
  
  
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<span style="font-weight: normal;"><u>External Address</u></span>
 
  
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This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''ExtAddress''.
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==Property reference==
  
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Selects the value of the three address pins for the MCP23S17.
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{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
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|-
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<span style="font-weight: normal;"><u>Channel</u></span>
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| width="10%" align="center" style="background-color:#D8C9D8;" | [[File:Fc9-prop-icon.png]]
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties'''  
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This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''cal_i2c1::CHANNEL''.
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|-
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|-
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Channel selection
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| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
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| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | I²C Communications
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<span style="font-weight: normal;"><u>Stop Delay</u></span>
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|-
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|-
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This property is of type ''True or false'' and can be referenced with the variable name ''cal_i2c1::StopDel''.
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | Device Type
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On older microcontroller devices there is a potential for the I2C hardware channel to lock up if there is not  
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|-
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| colspan="2" | &nbsp;
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a 10ms delay between an I2C stop event and the next I2C start event.
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|-
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | External Address
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|-
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Most modern microcontrollers will not have a problem so this property can be disabled to speed up the  
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| colspan="2" | Selects the value of the three address pins for the MCP23S17.&nbsp;
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|-
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I2C communications.
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | Channel
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<span style="font-weight: normal;"><u>Baud Select</u></span>
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|-
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| colspan="2" | Channel selection&nbsp;
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This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''cal_i2c1::BAUD_LIST''.
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|-
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| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
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Baud rate option selector
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| width="90%" | Stop Delay
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|-
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<span style="font-weight: normal;"><u>Baud Rate</u></span>
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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. &nbsp;
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|-
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This property is of type ''Signed integer'' and can be referenced with the variable name ''cal_i2c1::BAUD''.
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | Baud Select
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Baud rate to be used
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|-
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| colspan="2" | Baud rate option selector&nbsp;
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<span style="font-weight: normal;"><u>SDA</u></span>
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|-
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| width="10%" align="center" | [[File:Fc9-type-14-icon.png]]
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This property is of type ''Single digital pin'' and can be referenced with the variable name ''cal_i2c1::SDA''.
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| width="90%" | Baud Rate
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|-
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Pin used for SDA (data signal)
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| colspan="2" | Baud rate to be used&nbsp;
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|-
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<span style="font-weight: normal;"><u>SCL</u></span>
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| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
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| width="90%" | SDA
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This property is of type ''Single digital pin'' and can be referenced with the variable name ''cal_i2c1::SCL''.
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|-
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| colspan="2" | Pin used for SDA (data signal)&nbsp;
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Pin used for SCL (clock signal)
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|-
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| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
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<span style="font-weight: normal;"><u>Label</u></span>
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| width="90%" | SCL
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|-
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This property is of type ''Line of text'' and can be referenced with the variable name ''label''.
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| colspan="2" | Pin used for SCL (clock signal)&nbsp;
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|-
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''<span style="color:red;">No additional information</span>''
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| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
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| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Simulation
−
 
+
|-
−
 
+
|-
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<span style="font-weight: normal;"><u>Scope Traces</u></span>
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| width="10%" align="center" | [[File:Fc9-type-10-icon.png]]
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| width="90%" | Label
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This property is of type ''True or false'' and can be referenced with the variable name ''cal_i2c1::ScopeTraces''.
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|-
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| colspan="2" | &nbsp;
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Selects if the scope traces are automatically generated or not
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|-
−
 
+
| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
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<span style="font-weight: normal;"><u>Console Data</u></span>
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| width="90%" | Scope Traces
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+
|-
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This property is of type ''True or false'' and can be referenced with the variable name ''cal_i2c1::ConsoleData''.
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| colspan="2" | Selects if the scope traces are automatically generated or not&nbsp;
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|-
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Selects if the console data is automatically generated or not
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| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
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| width="90%" | Console Data
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<span style="font-weight: normal;"><u>Injector</u></span>
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|-
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| colspan="2" | Selects if the console data is automatically generated or not&nbsp;
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This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''cal_i2c1::Injector''.
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|-
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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''<span style="color:red;">No additional information</span>''
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| width="90%" | API
 +
|-
 +
| colspan="2" | &nbsp;
 +
|}

Latest revision as of 17:20, 9 November 2022

Author Matrix TSL
Version 1.0
Category Comms: System


IO Expander component

Provides 16 digital input/output pins arranged into 8-bit ports using a I2C bus connection. Up to eight expanders can be connected to the same I2C peripheral by means of three address pins. Supports the PCF8575 device allowing up to 8 expanders to be connected to the same I2C bus.

Component Pack

COMMSA

Detailed description

No detailed description exists yet for this component

Examples

No additional examples


Downloadable macro reference

Fc9-comp-macro.png ReadPort
Reads the current input value of the I/O pins. 
Fc9-u16-icon.png - UINT Return


Fc9-comp-macro.png WritePort
Writes an output value to the IO pins 
Fc9-u16-icon.png - UINT Value
Value to write. Range 0-65535 
Fc9-void-icon.png - VOID Return


Fc9-comp-macro.png Initialise
 
Fc9-void-icon.png - VOID Return



Property reference

Fc9-prop-icon.png Properties
Fc9-conn-icon.png I²C Communications
Fc9-type-16-icon.png Device Type
 
Fc9-type-16-icon.png External Address
Selects the value of the three address pins for the MCP23S17. 
Fc9-type-16-icon.png Channel
Channel selection 
Fc9-type-7-icon.png 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.  
Fc9-type-16-icon.png Baud Select
Baud rate option selector 
Fc9-type-14-icon.png Baud Rate
Baud rate to be used 
Fc9-type-5-icon.png SDA
Pin used for SDA (data signal) 
Fc9-type-5-icon.png SCL
Pin used for SCL (clock signal) 
Fc9-conn-icon.png Simulation
Fc9-type-10-icon.png Label
 
Fc9-type-7-icon.png Scope Traces
Selects if the scope traces are automatically generated or not 
Fc9-type-7-icon.png Console Data
Selects if the console data is automatically generated or not 
Fc9-type-16-icon.png API
 
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