AX_SPI_CR1
new_ctrl_reg = ax_spi_read(xspi, AX_SPI_CR1);
ax_spi_write(xspi, AX_SPI_CR1, new_ctrl_reg);
ax_spi_write(xspi, AX_SPI_CR1, 0x03);
reg_value = ax_spi_read(xspi, AX_SPI_CR1);
ax_spi_write(xspi, AX_SPI_CR1, reg_value);
reg_value = ax_spi_read(xspi, AX_SPI_CR1);
ax_spi_write(xspi, AX_SPI_CR1, reg_value);
ax_spi_write(xspi, AX_SPI_CR1, AX_SPI_CR1_CLR);
reg_value = ax_spi_read(xspi, AX_SPI_CR1);
ax_spi_write(xspi, AX_SPI_CR1, reg_value);