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by MrBool
Sat Mar 24, 2018 12:26 pm
Forum: General discussion
Topic: Boot delay
Replies: 5
Views: 1441

Re: Boot delay

In config.txt I have only:

ignore_lcd=1
force_eeprom_read=0
hdmi_ignore_edid=0xa5000080
by MrBool
Fri Mar 23, 2018 3:45 pm
Forum: General discussion
Topic: Boot delay
Replies: 5
Views: 1441

Boot delay

I use the latest image of Raspbian on the Compute Module. I noticed that after power on the first message on UART "Booting Linux on physical CPU 0x0" is after 5-6 seconds. Is possible make this delay shorter? I don't need HDMI and in the previous images I used in config: ignore_lcd=1 force_eeprom_re...
by MrBool
Fri Mar 23, 2018 2:33 pm
Forum: Compute Module
Topic: Two different config files
Replies: 0
Views: 438

Two different config files

Is possible to define two different config files? I want to create one image for two different devices based on CM. Depending on the device I want to use suitable config.
by MrBool
Thu Mar 15, 2018 7:43 am
Forum: Advanced users
Topic: Particular subversion of kernel
Replies: 0
Views: 602

Particular subversion of kernel

How can I download particular subversion of the kernel? For example: git clone --depth=1 -b rpi-4.9.y https://github.com/raspberrypi/linux.git cd linux head Makefile -n 3 give me 4.9.80 version. I want to apply RT preempt patch and there are no patches for 4.9.80: https://mirrors.edge.kernel.org/pub...
by MrBool
Tue Nov 07, 2017 5:55 pm
Forum: Compute Module
Topic: Flashing the Compute Module issue
Replies: 1
Views: 654

Flashing the Compute Module issue

During flashing the 250 pieces of Compute Modules I noticed that in two cases CM does not pop up under Windows as a disk. Rpiboot messages are the same as for others CMs (without any errors). Do you have any advice?
by MrBool
Sun Oct 22, 2017 4:33 pm
Forum: General discussion
Topic: Expand Filesystem - command line
Replies: 4
Views: 40488

Re: Expand Filesystem - command line

I have found solution:

Code: Select all

raspi-config --expand-rootfs
by MrBool
Sat Oct 21, 2017 1:02 pm
Forum: General discussion
Topic: Expand Filesystem - command line
Replies: 4
Views: 40488

Expand Filesystem - command line

Raspi-config has option "Expand Filesystem". Is possible to run this command from command line?
by MrBool
Tue May 23, 2017 10:46 am
Forum: General discussion
Topic: Kernel build - two different model
Replies: 1
Views: 415

Kernel build - two different model

I have to prepare one image for two different model od Raspberry with custom build kernel. First device is RASPBERRY PI 1 so I have to use bcmrpi_defconfig, second device is RASPBERRY PI 3, in this case I have to use bcm2709_defconfig. First kernel file is kernel.img and for second is kernel7.img. D...
by MrBool
Tue Apr 18, 2017 3:32 pm
Forum: Compute Module
Topic: CM3 ACT LED no longer blinking with mmc activity?
Replies: 26
Views: 8270

Re: CM3 ACT LED no longer blinking with mmc activity?

1) The activity LED isn't (directly) attached to GPIO47 - instead it is on an I2C-addressed GPIO expander. Thank you PhilE for your reply. I checked schematic of CM3 and I see that EMMC_EN_N_1V8 signal which control ACT LED is connected to FXL6408UMX (I2C GPIO expander). Now all is clear. So I conf...
by MrBool
Tue Apr 18, 2017 2:24 pm
Forum: Compute Module
Topic: CM3 ACT LED no longer blinking with mmc activity?
Replies: 26
Views: 8270

Re: CM3 ACT LED no longer blinking with mmc activity?

I tested ACT LED on CM and CM3 with Raspbian image from March. On CM everything works fine. On CM3 I noticed strange behavior. By default trigger is setup as heartbeat and it works fine. I can also control ACT LED by /sys/class/leds/led0/brightness. But when I want to control ACT LED by "gpio write ...
by MrBool
Fri Jun 24, 2016 2:52 pm
Forum: Troubleshooting
Topic: Watchdog kernel 4.4
Replies: 0
Views: 350

Watchdog kernel 4.4

I noticed strange behaviour of bcm2835_wtd driver. When I compile this driver as kernel module everything is fine. But when I compile kernel with built-in options for this driver, boot process stop after "Uncompressing Linux... done, booting the kernel". Setup "dtparam=watchdog" to "off" or "on" in ...
by MrBool
Sat Apr 02, 2016 7:58 am
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 5391

Re: Compute module boot time

mbuchmann wrote:Might be same problem as this: viewtopic.php?f=98&t=115095
Thanks a lot mbuchmann! Adding hdmi_edid_file=1 to the config.txt fixed the boot delay for me also.

BTW. Is there a documentation available for configuration with all available options?
by MrBool
Thu Mar 31, 2016 8:02 am
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 5391

Re: Compute module boot time

Hi, did you try to connect the RUN pin directly to 3.3V ? For me that fixed the boot delay. It's strange, but I had to connect it without any pull-up resistor. Even more strange is, that the RUN pin has 3.3V if you left it unconnected, but the CM has a big boot delay. This is really strange, becaus...
by MrBool
Wed Mar 30, 2016 5:50 pm
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 5391

Re: Compute module boot time

I had similar problem
viewtopic.php?f=98&t=127503&p=852959#p852959
I could not find solution.
by MrBool
Tue Dec 15, 2015 9:52 am
Forum: General discussion
Topic: Watchdog and reboot
Replies: 0
Views: 378

Watchdog and reboot

After reboot command I receive:

Code: Select all

wdt: WDT device closed unexpectedly.  WDT will not stop!
is it normal ? Do I have to stop watchdog before restart?
by MrBool
Mon Nov 30, 2015 1:20 pm
Forum: Compute Module
Topic: Raspbian Jessie Lite slow start
Replies: 0
Views: 1692

Raspbian Jessie Lite slow start

I use fresh Raspbian Jessie Lite image on Compute Module and time from power on to first text on serial port console ("Uncompressing Linux... done, booting the kernel.") is about 13 seconds. Why so much? Does bootloader wait for something?
by MrBool
Sat Oct 10, 2015 8:03 am
Forum: Raspberry Pi OS
Topic: (New) Official nightly full and cutdown/headless images
Replies: 83
Views: 47241

Re: (New) Official nightly full and cutdown/headless images

Marlor wrote:
ShiftPlusOne wrote:No nightlies yet, but here is an untested noX image:
https://repo.xecdesign.com/tmp/2015-09- ... ie-noX.zip
An apt-get update error on a cleen Image:
I use the same image and apt-get update works well.
by MrBool
Thu Oct 08, 2015 8:49 am
Forum: Raspberry Pi OS
Topic: (New) Official nightly full and cutdown/headless images
Replies: 83
Views: 47241

Re: (New) Official nightly full and cutdown/headless images

ShiftPlusOne wrote:No nightlies yet, but here is an untested noX image:
https://repo.xecdesign.com/tmp/2015-09- ... ie-noX.zip
I use this image and I noticed that DHCP for IPv4 is not working by default.
by MrBool
Sat Sep 26, 2015 12:40 pm
Forum: Compute Module
Topic: GPIO polarity change during boot
Replies: 0
Views: 763

GPIO polarity change during boot

How can I change polarity of GPIO during boot? dt-blob.bin does not change polarity. Function option works. For example I have in dt-blob: pin@p12 { function = "input"; termination = "no_pulling"; polarity = "active_low"; }; After boot: echo "12" > /sys/class/gpio/export cat /sys/class/gpio/gpio12/a...
by MrBool
Tue Jun 23, 2015 3:21 pm
Forum: Compute Module
Topic: Serial ports -- using both
Replies: 61
Views: 32236

Re: Serial ports -- using both

In the new kernel device tree (version 4) file are two uarts. I did not test it but it looks promising.
by MrBool
Wed Jun 10, 2015 11:02 am
Forum: Compute Module
Topic: Machine model
Replies: 3
Views: 780

Re: Machine model

I created my device tree file but it looks like kernel don't care about model node in dtb file.
by MrBool
Wed Jun 10, 2015 9:57 am
Forum: Compute Module
Topic: MAC address and OTP memory
Replies: 5
Views: 3192

Re: MAC address and OTP memory

I know that I can change MAC via cmdline.txt or ip link set but this is not good solution for me. When my customers update system thay always have to change this settings. I want to store MAC in OTP memory because it is independent of system image and customer can't change it (it is also identificat...
by MrBool
Wed Jun 10, 2015 9:50 am
Forum: Compute Module
Topic: MAC address and OTP memory
Replies: 5
Views: 3192

Re: MAC address and OTP memory

where do you see there is a lot of space ? root@raspberrypi:~# vcgencmd otp_dump 08:00000000 09:00000000 10:00000000 11:00000000 12:00000000 13:00000000 14:00000000 15:00000000 16:00280000 17:1020000a 18:1020000a 19:ffffffff 20:ffffffff 21:ffffffff 22:ffffffff 23:ffffffff 24:ffffffff 25:ffffffff 26...
by MrBool
Wed Jun 10, 2015 9:34 am
Forum: Compute Module
Topic: MAC address and OTP memory
Replies: 5
Views: 3192

MAC address and OTP memory

I noticed that MAC address is partialy taken from serial number. root@raspberrypi:~# cat /proc/cpuinfo processor : 0 model name : ARMv6-compatible processor rev 7 (v6l) BogoMIPS : 2.00 Features : half thumb fastmult vfp edsp java tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU p...

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