Difference between revisions of "Component: IO Expander (PCF8574) (PCF8574) (General Input)"
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''<span style="color:red;">No additional examples</span>'' | ''<span style="color:red;">No additional examples</span>'' | ||
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==Macro reference== | ==Macro reference== | ||
| + | ===Initialise=== | ||
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| + | | width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]] | ||
| + | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise''' | ||
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| + | | colspan="2" | | ||
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| + | | 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'' | ||
| + | |} | ||
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| + | ===ReadPort=== | ||
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| + | ===WritePort=== | ||
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Latest revision as of 13:11, 7 February 2023
| Author | Matrix TSL |
| Version | 1.0 |
| Category | General Input |
Contents
IO Expander (PCF8574) 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 Source Code
Please click here to download the component source project: FC_Comp_Source_IOEXP_PCF8574.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_IOEXP_PCF8574.fcfx
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Macro reference
Initialise
|
Initialise |
 - VOID
|
Return |
ReadPort
|
|
ReadPort |
| Reads the value of the IO pins. | |
 - BYTE
|
Return |
WritePort
|
|
WritePort |
| Writes a value to the IO pins. | |
| - BYTE
|
Value |
| Value to write. Range 0-255 | |
| - VOID
|
Return |
Property reference
|
Properties |
|
I²C Communications |
|
Device Type |
|
|
External Address |
| Selects the value of the three address pins for the MCP23S17. | |
|
|
Channel |
| Channel selection | |
|
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 | |
|
SDA |
| Pin used for SDA (data signal) | |
|
|
SCL |
| Pin used for SCL (clock signal) | |
|
|
Simulation |
|
Label |
|
|
Scope Traces |
| Selects if the scope traces are automatically generated or not | |
|
|
Console Data |
| Selects if the console data is automatically generated or not | |
|
|
API |
