topic Re: SPI_WriteData in LPC Microcontrollers

SPI_WriteData

_Ferrari_ — Mon, 19 Sep 2022 16:22:35 GMT

dear all,

I'm using SPI interface and I set 100000 as baudrate / 16 data bit. I'm using SPI_WriteData to transfer the data to a periferal and it works.

I inserted a delay function SDK_DelayAtLeastUs(160U, SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY); to avoid any overload error.

Instead of inserting a delay I would like to test a bit of the SPI periphery that indicates that the data transmission is completed

// now I'm using the following code SPI_WriteData(FLEXCOMM4_PERIPHERAL, data, configFlags); SDK_DelayAtLeastUs(160U, SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY); // but I would like to use the following procedure SPI_WriteData(FLEXCOMM4_PERIPHERAL, data, configFlags); while(SPI_checkTransmittedFlag(FLEXCOMM4_PERIPHERAL)) {}

Is there any SPI_chekTransmittedFlag that do that ?

Thank you very much for your help and cooperation

regards

Re: SPI_WriteData

Alice_Yang — Tue, 20 Sep 2022 08:38:52 GMT

Hello,

What about the part number of your mcu?

Alice

Re: SPI_WriteData

_Ferrari_ — Tue, 20 Sep 2022 09:46:14 GMT

Dear Alice,

I'm using LPC55S28 assembled in LPC55S28 -EVK board

regards

Re: SPI_WriteData

Alice_Yang — Wed, 21 Sep 2022 03:22:24 GMT

Hello,

Yes, you can check the register FIFOSTAT,

You can also use transmit interrupt:

Recommend you refer to SPI demo under SDK, it includes polling and interrupt mode.

Alice

Re: SPI_WriteData

_Ferrari_ — Tue, 27 Sep 2022 17:35:11 GMT

Solved!!