View source for iMX6 Rex Basic Updating SPI Bootloader

[[Category:iMX6 Rex Development kit]]
[[Category:iMX6 Rex Basic]]
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iMX6 Rex Module contains SPI Flash memory which is used as a default bootloader storage. This guide shows how to flash u-boot and configure it for SPI memory.<br /><br /> 

''''' Recommended HW: '''''
* PC with USB port
* Voipac iMX6 Rex Development kit in Ultra configuration
* USB to Micro-USB cable
* Ethernet cable

''''' Recommended SW: '''''
* Serial line terminal
* [http://downloads.voipac.com/files/iMX6_Rex_Development_kit/module/software/uboot/binaries/u-boot-imx6-rexbasic-2.4.imx Appropriate binary file]
* TFTP server with the image file stored

== Procedure ==
''''' Note: ''''' In case of booting malfunction, follow [[iMX6 Rex USB Booting|USB Booting steps]] first to load the firmware from PC.<br /><br />

Stop autoboot in serial line terminal. Copy and paste commands separately to download appropriate bootloader file from TFTP server:
<syntaxhighlight lang="bash">
setenv ipaddr 192.168.1.150
setenv serverip 192.168.1.75
mw.b 0x10800000 0xFF 0x80000
mw.b 0x10800000 0xFF 0x80000;tftp 0x10800000 u-boot-imx6-rexbasic-2.4.imx; sf probe
2:2;sf erase 0x0 0x80000;sf write 0x10800000 0x400 0x7fc00
</syntaxhighlight>
[[image:iMX6_Rex_Development_kit-SPI_bootloader_write.jpg|600px]]<br /><br />

The bootloader is written to SPI Flash after automatic download from the TFTP Server:<br />
[[image:iMX6_Rex_Development_kit-SPI_bootloader_written.jpg|600px]]<br /><br />

Reset the board. iMX6 Rex Module will start booting from SPI Flash. The bootloader will start to download Image from TFTP server by default:<br />
[[image:iMX6_Rex_Development_kit-SPI_bootloader_loaded.jpg|600px]]<br /><br />

To change bootloader environment, stop autoboot:<br />
[[image:iMX6_Rex_Development_kit-SPI_bootloader_loaded_stopped.jpg|600px]]