Delay after SPI.transfer befor setting SS pin high?

Projects Programming
1

Do I need to delay after doing an SPI.transfer to allow the byte to clock out before setting the SS pin high.

void SpiRAM::writeByte(long address, byte data_byte){
  // Write 24bit address, write byte
  digitalWrite(_ss_Pin, LOW);
  SPI.transfer(WRITE);
  SPI.transfer((byte)(address >> 16));
  SPI.transfer((byte)(address >> 8));
  SPI.transfer((byte)address);
  SPI.transfer(data_byte);
  delay(10);    // <=- Do I need this & what is a sensible delay value if I do.
  digitalWrite(_ss_Pin, HIGH);
}
2

Not normally. I have used delayMicroseconds(1) after taking the SS LOW to wait for a slow SPI device to get ready before starting a transfer, but not after the transfers. SPI.transfer doesn't return until the transfer is complete.

3

What do these do?

(byte)(address >> 16 )
(byte)(address >> 8 )
(byte)(address)

I've not seen that format before.

Delay before taking SS high is not needed.

4

CrossRoads:
What do these do?

(byte)(address >> 16 )
(byte)(address >> 8 )
(byte)(address)

The SRAM chip (23LC1024) uses 24 bit addresses so I'm splitting a long into it's lower 3 bytes. Maybe there is a better/more elegant way to do it.

5

SurferTim:
Not normally. I have used delayMicroseconds(1) after taking the SS LOW to wait for a slow SPI device to get ready before starting a transfer, but not after the transfers. SPI.transfer doesn't return until the transfer is complete.

Thanks, The chips CS setup time is 25ns so no problems there.