/* Detemine USI-SPI Receive FIFO is empty or not.  */
u32 USI_SSI_Readable(USI_TypeDef *usi_dev)
/* Detemine USI-SPI Receive FIFO is empty or not.  */
u32 USI_SSI_Readable(USI_TypeDef *usi_dev)
{
	u32 Status = USI_SSI_GetRxFIFOStatus(usi_dev);
	u32 Readable = (((Status & USI_RXFIFO_EMPTY) == 0) ? 1 : 0);
	return Readable;
}