918af4f3ac
* change simulator svg * change radio image * Remove google fonts cdn * change color of 'advanced' button * font fix * font fix 2 * display fix * change fullsceen simulator bg * Continuous servo * handle continuous state * adding shims * update rendering for continuous servos * fixing sim * fix sig * typo * fix sim * bump pxt * bump pxt * rerun travis * Input blocks revision - add Button and Pin event types - merge onPinPressed & onPinReleased in new onPinEvent function - create new onButtonEvent function * update input blocks in docs and tests * remove device_pin_release block * Hide DAL.x behind Enum * bring back deprecated blocks, but hide them * shims and locales files * fix input.input. typing * remove buildpr * bump V3 * update simulator aspect ratio * add Loudness Block * revoke loudness block * Adds soundLevel To be replaced by pxt-common-packages when DAL is updated. * Remove P0 & P3 from AnalogPin Co-authored-by: Juri <gitkraken@juriwolf.de>
1.6 KiB
1.6 KiB
spi Write
Write a data value to the SPI slave device and return its response.
pins.spiWrite(0);
Data values are written to a SPI slave device connected to the @boardname@ by the SPI pins. The data value might be either a command for the connected device or some value for its use. If the write operation causes the connected device to send a value back to the @boardname@, this will be the return value for the spiWrite function.
~ hint
Simulator: This function needs real hardware to work with. It's not supported in the simulator.
~
Parameters
value: a number which is the data value to send to the SPI slave device.
Returns
- a number value which is the response from the SPI slave device.
Example
Send the command to 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 P13, P14, and P15.
pins.digitalWritePin(DigitalPin.P0, 1);
pins.spiPins(DigitalPin.C15, DigitalPin.C14, DigitalPin.C13);
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)