Component: I2C Multiplexer (TCA9548A) (Comms: System)
(Redirected from Component: ID 5915b437 6925 4d90 a0f8 f91702837bdb)
| Author | MatrixTSL |
| Version | 1.0 |
| Category | Comms: System |
I2C Multiplexer (TCA9548A) component
An I2C multiplexing IC allowing up to 8 different I2C busses to be connected to a single I2C channel on your target microcontroller.
Component Source Code
Please click here to download the component source project: FC_Comp_Source_I2C_Multiplexer_TCA9548A.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_I2C_Multiplexer_TCA9548A.fcfx
Detailed description
No detailed description exists yet for this component
Examples
Here we have a simple example showing how to use the multiplexer to connect multiple of the same I2C sensor IC to the microcontroller.
The multiplexer IC is connected directly to the microcontroller I2C pins and up to 8 temp/humidity sensors are connected to the CH0-CH7 I2C pins of the multiplexer.
Macro reference
Initialise
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Initialise |
| Startup the I2C bus ready for communications. | |
 - VOID
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Return |
SelectChannel
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SelectChannel |
| Selects a single output channel to multiplex the I2C output to (0-7). | |
 - BYTE
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Channel |
| Range: 0-7 | |
| - VOID
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Return |
SetChannelMask
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SetChannelMask |
| Allows a user determined number of channels to be connected to the I2C bus. | |
| - BYTE
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Mask |
| Range: 0-255 / Bit0=CH0 EN / Bit1 = CH1 EN etc | |
| - VOID
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Return |
Property reference
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Properties |
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Multiplexer Properties |
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Address Bits |
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I2C Properties |
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Connections |
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Channel |
| Channel selection | |
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SDA |
| Pin used for SDA (data signal) | |
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SCL |
| Pin used for SCL (clock signal) | |
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Options |
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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. | |
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Baud Select |
| Baud rate option selector | |
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Baud Rate |
| Baud rate to be used | |
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Simulation |
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Simulate Comms |