Difference between revisions of "Component: IO Expander (PCF8574) (Comms: System)"

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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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| 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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| 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 8 digital input/output pins arranged into an 8-bit port 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 PCF8574 and PCF8574A devices allowing up to 16 expanders to be connected to the same I2C bus ( 8 x PCF8574 + 8 x PCF8574A ).
  
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==[[File:Component Icon d43a1c1f_8ad6_4271_9f62_20e1bdf529f0.png|Image]] IO Expander (PCF8574) component==
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==Component Pack==
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Provides 8 digital input/output pins arranged into an 8-bit port 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 PCF8574 and PCF8574A devices allowing up to 16 expanders to be connected to the same I2C bus ( 8 x PCF8574 + 8 x PCF8574A ).
 
  
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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 a value to one of the ports with a mask.
 
  
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Configures the masked bits to be inputs before reading the input value.
 
  
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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|BYTE]]
 
  
  
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===<span style="font-weight: normal;"><u><tt>WritePort</tt></u></span>===
 
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Writes a value to one of the ports with a mask.
 
  
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Configures the masked bits to be outputs before writing the output value.
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''No detailed description exists yet for this component''
  
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'''Parameters'''
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==Examples==
  
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:[[Variable Types|BYTE]] ''Value''
 
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::Value to write. Range 0-255
 
  
  
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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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''<span style="color:red;">No additional examples</span>''
  
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:''This call does not return a value''
 
  
 +
==Downloadable macro reference==
  
 +
{| 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;" | '''ReadPort'''
 +
|-
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| colspan="2" | Reads the value of the IO pins.&nbsp;
 +
|-
 +
|-
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| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
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| width="90%" style="border-top: 2px solid #000;" | ''Return''
 +
|}
  
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==Simulation 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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| 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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| colspan="2" | Writes a value to the IO pins.&nbsp;
 +
|-
 +
|-
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| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
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| width="90%" | Value
 +
|-
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| colspan="2" | Value to write. Range 0-255&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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==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;" | '''Initialise'''
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|-
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| colspan="2" | &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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|}
  
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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>''
 
  
  
 +
==Property reference==
  
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<span style="font-weight: normal;"><u>External Address</u></span>
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{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
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|-
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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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| 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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Selects the value of the three address pins for the MCP23S17.
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|-
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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:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
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| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | I²C Communications
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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" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | Device Type
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<span style="font-weight: normal;"><u>Stop Delay</u></span>
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|-
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| colspan="2" | &nbsp;
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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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|-
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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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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| width="90%" | External Address
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|-
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a 10ms delay between an I2C stop event and the next I2C start event.
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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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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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| width="90%" | Channel
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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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|-
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| colspan="2" | Channel selection&nbsp;
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I2C communications.
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|-
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| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
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<span style="font-weight: normal;"><u>Baud Select</u></span>
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| width="90%" | Stop Delay
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|-
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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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| 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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Baud rate option selector
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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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<span style="font-weight: normal;"><u>Baud Rate</u></span>
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|-
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| colspan="2" | Baud rate option selector&nbsp;
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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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|-
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| width="10%" align="center" | [[File:Fc9-type-14-icon.png]]
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Baud rate to be used
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| width="90%" | Baud Rate
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|-
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<span style="font-weight: normal;"><u>SDA</u></span>
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| colspan="2" | Baud rate to be used&nbsp;
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|-
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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="10%" align="center" | [[File:Fc9-type-5-icon.png]]
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| width="90%" | SDA
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Pin used for SDA (data signal)
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|-
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| colspan="2" | Pin used for SDA (data signal)&nbsp;
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<span style="font-weight: normal;"><u>SCL</u></span>
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|-
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| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
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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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| width="90%" | SCL
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|-
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Pin used for SCL (clock signal)
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| colspan="2" | Pin used for SCL (clock signal)&nbsp;
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|-
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<span style="font-weight: normal;"><u>Label</u></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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This property is of type ''Line of text'' and can be referenced with the variable name ''label''.
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|-
−
 
+
|-
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''<span style="color:red;">No additional information</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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+
|-
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| colspan="2" | &nbsp;
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<span style="font-weight: normal;"><u>Scope Traces</u></span>
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|-
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| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
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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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| width="90%" | Scope Traces
−
 
+
|-
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Selects if the scope traces are automatically generated or not
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| colspan="2" | Selects if the scope traces are automatically generated or not&nbsp;
−
 
+
|-
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<span style="font-weight: normal;"><u>Console Data</u></span>
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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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This property is of type ''True or false'' and can be referenced with the variable name ''cal_i2c1::ConsoleData''.
+
|-
−
 
+
| colspan="2" | Selects if the console data is automatically generated or not&nbsp;
−
Selects if the console data is automatically generated or not
+
|-
−
 
+
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
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<span style="font-weight: normal;"><u>Injector</u></span>
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| width="90%" | API
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+
|-
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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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| colspan="2" | &nbsp;
−
 
+
|}
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''<span style="color:red;">No additional information</span>''
 

Latest revision as of 17:20, 9 November 2022

Author Matrix TSL
Version 1.0
Category Comms: System


IO Expander component

Provides 8 digital input/output pins arranged into an 8-bit port 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 PCF8574 and PCF8574A devices allowing up to 16 expanders to be connected to the same I2C bus ( 8 x PCF8574 + 8 x PCF8574A ).

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 value of the IO pins. 
Fc9-u8-icon.png - BYTE Return


Fc9-comp-macro.png WritePort
Writes a value to the IO pins. 
Fc9-u8-icon.png - BYTE Value
Value to write. Range 0-255 
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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