S32KのトピックRe: SPI on S32K148

SPI on S32K148

RishikeshB — Thu, 15 Sep 2022 01:34:32 GMT

Hello NXP

I am working on S32K148 for SPI

How to configure SPI in master mode only and how to check the output result

I don't have any slave Device.

Is there any sample code?

Re: SPI on S32K148

Senlent — Thu, 15 Sep 2022 03:17:16 GMT

Hi@RishikeshB

please take a try the demo:lpspi_transfer_s32k148

The application uses two on board instances of LPSPI, one in master configuration and the other one is slave to communicate data via the SPI bus. Data will be gathered periodically from the ADC input and will be sent to the master device which transforms it into a PWM signal. In this way the potentiometer controls the LED intensity.

I have tested this routine and the waveforms tested by the oscilloscope are all working fine！

Re: SPI on S32K148

RishikeshB — Mon, 19 Sep 2022 07:31:58 GMT

What data are we actually sending in this

Re: SPI on S32K148

Senlent — Mon, 19 Sep 2022 08:02:23 GMT

an 8-bit data：

uint8_t slaveDataSend;

slaveDataSend = (uint8_t)adcRead;
LPSPI_DRV_SlaveTransfer(RECEIVE, &slaveDataSend, &slaveDataReceive, BUFFER_SIZE);