Component: IO Expander (PCF8575) (PCF8575) (General Input)
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Jump to navigationJump to search| Author | Matrix TSL |
| Version | 1.0 |
| Category | General Input |
Contents
IO Expander (PCF8575) 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 Source Code
Please click here to download the component source project: FC_Comp_Source_IOEXP_PCF8575.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_IOEXP_PCF8575.fcfx
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Macro reference
|
ReadPort |
| Reads the current input value of the I/O pins. | |
 - UINT
|
Return |
|
|
WritePort |
| Writes an output value to the IO pins | |
| - UINT
|
Value |
| Value to write. Range 0-65535 | |
 - VOID
|
Return |
|
|
Initialise |
| - 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 |
==Macro reference==
|
|
ReadPort |
| Reads the current input value of the I/O pins. | |
| - UINT
|
Return |
|
|
WritePort |
| Writes an output value to the IO pins | |
| - UINT
|
Value |
| Value to write. Range 0-65535 | |
| - VOID
|
Return |
|
|
Initialise |
| - 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 |
==Macro reference==
|
|
ReadPort |
| Reads the current input value of the I/O pins. | |
| - UINT
|
Return |
|
|
WritePort |
| Writes an output value to the IO pins | |
| - UINT
|
Value |
| Value to write. Range 0-65535 | |
| - VOID
|
Return |
|
|
Initialise |
| - 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 |
==Macro reference==
|
|
ReadPort |
| Reads the current input value of the I/O pins. | |
| - UINT
|
Return |
|
|
WritePort |
| Writes an output value to the IO pins | |
| - UINT
|
Value |
| Value to write. Range 0-65535 | |
| - VOID
|
Return |
|
|
Initialise |
| - 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 |
