CY_SPI_DATA_BUF_SIZE
CY_SPI_DATA_BUF_SIZE * 2);
u8 *rd_buf = &xfer_buf[CY_SPI_DATA_BUF_SIZE];
memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE);
memset(rd_buf, 0, CY_SPI_DATA_BUF_SIZE);