Problem With SPI on S32K148

RishikeshB — Thu, 15 Sep 2022 10:21:49 GMT

Hello NXP,

I am using below code but not able to see the waveforms on oscilloscope correctly

can you please check with the code and if any changes are required please let me know

Waiting for your reply

#include "S32K148.h"
#include "device_registers.h"
#include "LPSPI.h"
#include "clocks_and_modes.h"

uint16_t tx_16bits = 0xFD00;
uint16_t LPSPI1_16bits_read;

void WDOG_disable (void)
{
WDOG->CNT=0xD928C520; /* Unlock watchdog */
WDOG->TOVAL=0x0000FFFF; /* Maximum timeout value */
WDOG->CS = 0x00002100; /* Disable watchdog */
}

void PORT_init (void)
{
/*!
* Pins definitions
* ===================================================
*
* Pin number | Function
* ----------------- |------------------
* PTA26 | LPSPI1_PCS0
* PTA27 | LPSPI1_SOUT
* PTA28 | LPSPI1_SCK
* PTA29 | LPSPI1_SIN
*/
PCC->PCCn[PCC_PORTA_INDEX ]|=PCC_PCCn_CGC_MASK; /* Enable clock for PORTB */
PORTA->PCR[26]|=PORT_PCR_MUX(3); /* Port B14: MUX = ALT3, LPSPI1_PCS0 */
PORTA->PCR[27]|=PORT_PCR_MUX(3); /* Port B15: MUX = ALT3, LPSPI1_SOUT */
PORTA->PCR[28]|=PORT_PCR_MUX(3); /* Port B16: MUX = ALT3, LPSPI1_SCK */
PORTA->PCR[29]|=PORT_PCR_MUX(3); /* Port B17: MUX = ALT3, LPSPI1_SIN */
}

int main(void)
{

/*!
* Initialization:
* =======================
*/
WDOG_disable(); /* Disable WDOG */
SOSC_init_8MHz(); /* Initialize system oscillator for 8 MHz xtal */
SPLL_init_160MHz(); /* Initialize SPLL to 160 MHz with 8 MHz SOSC */
NormalRUNmode_80MHz(); /* Init clocks: 80 MHz sysclk & core, 40 MHz bus, 20 MHz flash */
LPSPI1_init_master(); /* Initialize LPSPI 1 as master */
PORT_init(); /* Configure ports */

while(1)
{
uint8_t counter = 0;

LPSPI1_transmit_16bits(tx_16bits); /* Transmit half word (16 bits) on LPSPI1 */
counter++;
LPSPI1_16bits_read = LPSPI1_receive_16bits(); /* Receive half word on LSPI1 */

}

Re: Problem With SPI on S32K148

Robin_Shen — Mon, 19 Sep 2022 06:35:44 GMT

Hi RishikeshB,

This question seems same as Problem with Chip Select S32K. I will answer the question there.

Best Regards,
Robin
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