spi.SendBuf

#include <file_config.h>

BOOL SendBuf  (
     U8* buf,    /* buffer containing the data */
     U32 sz);    /* buffer size in bytes       */

The function SendBuf transmits data to the SPI interface. The parameter buf is a pointer to the buffer containing the data. The parameter sz specifies the buffer size.

The function is part of the SPI Driver. The prototype is defined in the file File_Config.h. Developers must customize the function.

• __TRUE - on success.
• __FALSE - on failure.

spi.BusSpeed, spi.CheckMedia, spi.Init, spi.RecBuf, spi.Send, spi.SetSS, spi.UnInit

/* SPI Device Driver Control Block */
SPI_DRV spi0_drv = {
  Init,
  UnInit,
  Send,
  SendBuf,
  RecBuf,
  BusSpeed,
  SetSS,
  CheckMedia                          /* Can be NULL if not existing */
};

static BOOL SendBuf (U8 *buf, U32 sz) {
  /* Send buffer to SPI interface. */
  U32 i;

  for (i = 0; i < sz; i++) {
    SSPDR = buf[i];
    /* Wait if Tx FIFO is full. */
    while (!(SSPSR & TNF));
    SSPDR;
  }
  /* Wait until Tx finished, drain Rx FIFO. */
  while (SSPSR & (BSY | RNE)) {
    SSPDR;
  }
  return (__TRUE);
}