SPI on MKV58F1M0VLQ24

john71 — Wed, 18 Nov 2020 15:58:45 GMT

On MK10FN1M0VLQ12 I did this way

uint32_t SPI_TransferByte(uint32_t spi_num, uint8_t tx_data, uint8_t *rx_data) { uint32_t timeout; SPIx[spi_num]->PUSHR = SPI_PUSHR_CTAS(0) | SPI_PUSHR_TXDATA((uint32_t)tx_data); timeout = 0; while (!( SPIx[spi_num]->SR & SPI_SR_TCF_MASK)) { if (timeout++ > SPI_TIMEOUT) { SPIx[spi_num]->SR = SPI_SR_TCF_MASK; return SPI_TIMEOUT_ERROR; } } timeout = 0; while (!(SPIx[spi_num]->SR & SPI_SR_RFDF_MASK)) { if (timeout++ > SPI_TIMEOUT) { SPIx[spi_num]->SR = SPI_SR_RFDF_MASK; return SPI_TIMEOUT_ERROR; } } *rx_data = (uint8_t)SPIx[spi_num]->POPR; SPIx[spi_num]->SR = SPI_SR_TCF_MASK | SPI_SR_RFDF_MASK; return 0; }

And it work very good.

So I did the same on MKV58F1M0VLQ24

uint8_t SPI_TransferByte(SPI_Type *base, uint8_t tx_data) { uint32_t timeout = 0; base->PUSHR = SPI_PUSHR_CTAS(0) | SPI_PUSHR_TXDATA((uint32_t)tx_data); while ((base->SR & SPI_SR_TCF_MASK) == 0) { if (timeout++ > 100000) { base->SR |= SPI_SR_TCF_MASK; break; } } base->SR |= SPI_SR_TCF_MASK; timeout = 0; while ((base->SR & SPI_SR_RFDF_MASK)==0) { if (timeout++ > 100000) { base->SR |= SPI_SR_RFDF_MASK; break; } } base->SR |= SPI_SR_RFDF_MASK; return (uint8_t)(base->POPR); }

And I stay in

while ((base->SR & SPI_SR_TCF_MASK) == 0)

the flag always low.

What I did wrong?

Re: SPI on MKV58F1M0VLQ24

Omar_Anguiano — Mon, 23 Nov 2020 20:47:27 GMT

Hello

Before writing data to PUSHR you need to clear the MCR[HALT] field to start the transmission, also please check if the module is enabled, otherwise writing to PUSHR has no effect.

The code stays in "while ((base->SR & SPI_SR_TCF_MASK) == 0)" while the transfer is still in progress.

I suggest you refer to the SDK examples, there you can functions that will help you with this.

Let me know if this is helpful, if you have more questions do not hesitate to ask me.

Best regards,

Omar

topic Re: SPI on MKV58F1M0VLQ24 in Kinetis Microcontrollers

SPI on MKV58F1M0VLQ24

Re: SPI on MKV58F1M0VLQ24