topic Re: K64 SPI - what are the function to read and write single byte or short? in Kinetis Design Studio

K64 SPI - what are the function to read and write single byte or short?

eliar — Mon, 10 Oct 2016 18:26:35 GMT

In the SPI demo for k64 there are examples that show how to transfer block of data from master to slave.

but suppose i have an external hardware that connect to k64 as a SPI slave device.

this device can be any kind of device that's its interface has SPI where we need to write and read single register

they can be byte or short.

So what are the single atomic functions to read and write for the master

are they?

DSP_ReadData for reading

and

DSPI_MasterWriteCommandDataBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, data);

for writing?

Thanks!

Re: K64 SPI - what are the function to read and write single byte or short?

Alice_Yang — Tue, 11 Oct 2016 03:25:00 GMT

Hello Eli,

The function of "DSPI_MasterTransferNonBlocking()" can used as both receive and send .

The butter and size is configured in a structure like the demo :

If you want send one byte , set the dataSize to 1 : slaveXfer.dataSize =1;

Hope it helps

Have a great day,
Alice

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Re: K64 SPI - what are the function to read and write single byte or short?

eliar — Tue, 11 Oct 2016 03:28:04 GMT

And if want just writing and then reading?

Should I set it to zero read?

Can I use function just for read and write?

And not the API that do transfer?

Eli

Re: K64 SPI - what are the function to read and write single byte or short?

Alice_Yang — Tue, 11 Oct 2016 03:54:42 GMT

Hello Eli,

I checked the code of "DSPI_ReadData" and "DSPI_MasterWriteCommandDataBlocking" ,

i think yes , you can use it to read and write .

Alice