pxt-calliope/docs/reference/pins/spi-frequency.md

SPI Frequency

Set the SPI clock frequency.

pins.spiFrequency(1000000);

Parameters

• frequency: a number to set as the frequency for SPI bus clock. This value is the number of clock changes per second (Hz).

Example

Read the value of the WHOAMI register from the device connected to the SPI bus. The chip select line is connected to pin 0 and the SPI signals use pins 13, 14, and 15.

pins.digitalWritePin(DigitalPin.P0, 1);
pins.spiPins(DigitalPin.P15, DigitalPin.P14, DigitalPin.P13);
pins.spiFormat(8, 3);
pins.spiFrequency(1000000);
pins.digitalWritePin(DigitalPin.P0, 0);
let command = pins.spiWrite(143);
let whoami = pins.spiWrite(0);
pins.digitalWritePin(DigitalPin.P0, 1);
basic.showNumber(whoami);
serial.writeLine("WHOAMI register value: " + whoami)

See also

SPI