CY_SPI_CMD_BYTES
for (i = 0; i < CY_SPI_CMD_BYTES; i++)
#define CY_SPI_DATA_BUF_SIZE (CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
xfer[0].len = length + CY_SPI_CMD_BYTES;
xfer[0].len = CY_SPI_CMD_BYTES;