Embedded Files
Here is the final & complete PCB stackup document based on what the iMX6 Rex module was build:
This is how the impedance test report looks like (results from the measuring the real PCB):
iMX6-Rex-Module-V1I1-PCB-Impedance-measuring-results.xlsThanks to Exception PCB, the iMX6 Rex PCB V1I1 manufacturer, for providing these documents.
You can see the full specification and download 3D PDF of the iMX6 Rex Development baseboard here >>
The iMX6 Rex PCB is placed into panels of two.
… and here are some picture from PCB manufacturing at Exception PCB. I use them for all prototypes and I am very happy with their work.
Everything you need is uBoot, serial port, kernel and ram disk. Watch the module booting here:
We do not have baseboard yet, but I was really interested to test the module – especially run memory test. Also, we can prepare software and configure all the interfaces & pins based on our hardware without any baseboard. Once the baseboards come in we can immediately test it.
This is a great video from assembling the first prototypes of iMX6 modules. A big thank you to our assembly house AMSET.
We would like to share the happy moments with you (specially, see the end of the video) I have put all the individual steps with a short description into one of my posts on my blog: 9 Steps to Bring up a Freescale i.MX6 Board to Life
Posted on October 21, 2013 by Robert Feranec
During i.MX6 Rex PCB Layout Martin took screenshot of every layer in 20 minute intervals. Then we made this video which shows weeks of work in 1 minute and 43 seconds.
Posted on October 21, 2013 by Robert Feranec
The first pictures of the module
1) We have got the very first prototype of i.MX6 Rex module just Today
2) We have successfully booted it up to Linux – Today
3) We have recorded the process of bringing the module up and we will share it with you soon …
4) Pictures are coming soon …
Here is the first console output:
-Boot 2009.08 (Apr 25 2013 - 03:48:11)
CPU: Freescale i.MX6 family TO1.2 at 792 MHz
Thermal sensor with ratio = 181
Temperature: 35 C, calibration data 0x5774f169
mx6q pll1: 792MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock : 66000000Hz
ipg per clock : 66000000Hz
uart clock : 80000000Hz
cspi clock : 60000000Hz
ahb clock : 132000000Hz
axi clock : 264000000Hz
emi_slow clock: 132000000Hz
ddr clock : 528000000Hz
usdhc1 clock : 198000000Hz
usdhc2 clock : 198000000Hz
usdhc3 clock : 198000000Hz
usdhc4 clock : 198000000Hz
nfc clock : 24000000Hz
Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ]
Boot Device: NOR
I2C: ready
DRAM: 1 GB
MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3
Using default environment
In: serial
Out: serial
Err: serial
Net: got MAC address from IIM: 00:00:00:00:00:00
FEC0 [PRIME]
Hit any key to stop autoboot: 0
## Booting kernel from Legacy Image at 10800000 ...
Image Name: Linux-3.0.35-2508-g54750ff
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3161728 Bytes = 3 MB
Load Address: 10008000
Entry Point: 10008000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 10c00000 ...
Image Name: uboot initramfs rootfs
Image Type: ARM Linux RAMDisk Image (gzip compressed)
Data Size: 4545835 Bytes = 4.3 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
Linux version 3.0.35-2508-g54750ff (r65388@shlinux3) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #1 SMP PREEMPT Thu Apr 25 03:42:37 CST 2013
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
.... and it continues ....
Linux machine for source code compilation
If you are planning to compile your own i.MX6 uBoot & Linux, you will need to setup a Linux host. Follow these steps to prepare one: https://github.com/FEDEVEL/imx6rex-u-boot-2009.08/wiki
(Note: Later I will upload my virtual machine, so you dont have to install everything by yourself.)
uBoot Source code
The initial version of iMX6 Rex uBoot source code can be found at: https://github.com/FEDEVEL/imx6rex-u-boot-2009.08
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