spi.SetSS

#include <file_config.h>

BOOL SetSS  (
     U32 ss);    /* Enable/Disable SPI Slave Select */

The function SetSS enables or disables Slave Select on the SPI interface. The parameter ss specifies the state of the Slave Select signal.

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.SendBuf, spi.UnInit

/* SPI Device Driver Control Block */
SPI_DRV spi0_drv = {
  Init,
  UnInit,
  Send,
  SendBuf,
  RecBuf,
  BusSpeed,
  SetSS,
  CheckMedia
};

/* Enable/Disable SPI Chip Select (drive it high or low). */
static BOOL SetSS (U32 ss) {

  if (ss) {
    IOSET0 = 1<<20;             /* SSEL is GPIO, output set to high. */
  }
  else {
    IOCLR0 = 1<<20;             /* SSEL is GPIO, output set to low. */
  }
  return (__TRUE);
}