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SPI
The SPI Interface provides a "Serial Peripheral Interface" Master.
This interface can be used for communication with SPI slave devices, such as FLASH memory, LCD screens and other modules or integrated circuits.
Hello World!¶
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API¶
Import librarymbed
Details¶
The SPI Interface can be used on mbed pins p5/p6/p7 and p11/p12/p13
The default settings of the SPI interface are 1MHz, 8-bit, Mode 0
The SPI Interface can be used to write data words out of the SPI port, returning the data received back from the SPI slave. The SPI clock frequency and format can also be configured. The format is set to data word length 8 to 16 bits, and the mode as per the table below:
| Mode | Polarity | Phase |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 0 | 1 |
| 2 | 1 | 0 |
| 3 | 1 | 1 |
The SPI master generates a clock to synchronously drive a serial bit stream slave. The slave returns a bit stream, also synchronous to the clock.