44 lines
1.3 KiB
Markdown
44 lines
1.3 KiB
Markdown
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# spi Pins
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Set the Serial Peripheral Interface (SPI) signalling pins
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```sig
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pins.spiPins(DigitalPin.P0, DigitalPin.P1, DigitalPin.P2);
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```
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To configure the @boardname@ to write to an external device using a SPI connection, each SPI signal line is assigned to unique a pin. A SPI connection uses 3 signalling lines called **MOSI**, **MISO**, and **SCK**.
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### ~ hint
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**Simulator**: This function needs real hardware to work with. It's not supported in the simulator.
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### ~
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If you don't set the pins for the SPI connection, the default pin assignments are used:
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* **P15** = **MOSI**, @boardname@ SPI data output pin
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* **P14** = **MISO**, @boardname@ SPI data input pin
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* **P13** = **SCK**, @boardname@ SPI serial clock output pin
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## Parameters
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* **mosi**: the pin for SPI data output, the **MOSI** signal pin.
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* **miso**: the pin for SPI data input, the **MISO** signal pin.
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* **sck**: the pin for SPI serial clock output, the **SCK** signal pin.
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## Example
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Set the pin assignments for a SPI connection to the default pins.
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```blocks
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pins.spiPins(DigitalPin.P15, DigitalPin.P14, DigitalPin.P13);
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```
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## See also
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[spi write](/reference/pins/spi-write),
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[spi frequency](/reference/pins/spi-frequency),
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[spi format](/reference/pins/spi-format)
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[SPI Programming](https://developer.mbed.org/handbook/SPI)
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