Porting SPI Driver to Keil RL-ARM System: RecBuf

tfrauenrath — Wed, 03 Jul 2013 14:01:13 GMT

My task is to port a NXP SPI driver delivered with Keil RL-ARM to my Kinetis K60 system. Finlay I want to talk to SD cards in SPI mode. I do this step by step. My next task is the Send routine.

RL-ARM User's Guide: spi.RecBuf Library Routine

This is the original NXP Send:

/* Receive SPI data to buffer. */
static BOOL RecBuf (U8 *buf, U32 sz) {
  U32 i;

  for (i = 0; i < sz; i++) {
  SSPDR = 0xFF;
  while (!(SSPSR & RNE)); /* Wait while Rx FIFO is empty. */
  buf[i] = SSPDR;
  }
  return (__TRUE);
}

This my first trial for the Kinetis RecBuf

/*--------------------------- RecBuf ----------------------------------------*/
/* Receive SPI data to buffer. */
static BOOL RecBuf (U8 *buf, U32 sz) {
  U32 i;
  for (i = 0; i < sz; i++)   buf[i] = SPI2->POPR;
  return (__TRUE);
  }

Do you think this is applicable for SD card access via SPI?

I will discuss the other routines in other threads because of a better overview. I will post the final driver, because Keil provides only samples for SDHC mode for memory cards for the Kinetis system.

Thank you

topic Porting SPI Driver to Keil RL-ARM System: RecBuf in Kinetis Microcontrollers

Porting SPI Driver to Keil RL-ARM System: RecBuf