https://support.tq-group.com/ 2026-06-08T21:17:36+00:00 https://support.tq-group.com/ https://support.tq-group.com/_media/logo.png text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/boot_process?rev=1738063030&do=diff Boot process (suggestion) FIXME Overview Errors during flashing or faulty kernel or root filesystem (RFS) images usually result in an unusable (“bricked”) system. To avoid this, two versions of the kernel and RFS are stored in the flash memory. One kernel and one RFS belong together and are referred to as text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/build?rev=1738063030&do=diff The build environment After completing the Installation of the build environment U-Boot, Linux kernel, individual programs or an archive of a complete profile for the MFG tool can be built. The top level directory of the build environment is called $TOPDIR. MFG profiles MFG profile archives can be built from the top level directory of the build environment by executing text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/configuring_uboot?rev=1738063030&do=diff Configuring U-Boot Default settings IP address 172.16.135.170 Netmask 255.255.255.0 Default gateway 172.16.135.254 MAC address 02:00:01:00:00:01 IP-Mode kernel static LC display FG0700K5DSSWBG01 root password root The TCP/IP parameters can be changed in U-Boot. Therefore a serial connection to the MBa28 board is required. Interrupt the boot process by pressing any key. Set new values for the corresponding variables and save the environment: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/dip_switches?rev=1738063030&do=diff DIP switch settings Location of the DIP switches S4 and S5 on the MBa28 Rescue mode Rescue mode DIP OFF ON S4 1 X S4 2 X S4 3 X S4 4 X S5 1 X S5 2 N/A S5 3 N/A S5 4 N/A Boot from eMMC Boot from eMMC text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/downloads?rev=1738063030&do=diff Download URLs ELDK toolchain <http://repository.reccoware.de/stuff/tq0412/arm-2008-11-24.iso> Debian Root-Filesystem Archive * <http://repository.reccoware.de/stuff/tq0412/rootfs-squeeze-20110911-01.tgz> [CURRENT] This archive contains a debian tree which can be mounted as the root filesystem by the TQMa28. MFG Profile Linux Installation * <http://repository.reccoware.de/stuff/tq0412/tqma28-mfg-linux-update-20110911-01.zip> [CURRENT] Profile for installing the bootlets, U-Boot, kerne… text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/faq?rev=1738063030&do=diff FAQ U-Boot: "set read bl len failed" on access to SD card => After being plugged in the sd card must be initialised prior to any access. The command mmc rescan 1 does that. U-Boot: Usage messages for the command "setenv" U-Boot prints the following error message at boot time: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/features?rev=1738063030&do=diff TQMa28: Supported features Linux Kernel Component Status Remarks Boot + from eMMC and SD card; via TFTP using U-Boot Ethernet + eMMC + no DDR ext. SD + Display + Touch + USB + Sound +/? EEPROM + CAN + DUART + text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/install-sd?rev=1738063030&do=diff Install an OS image using the TQ-SD Card From now (March 2012) on, all starterkits will include an TQ SD card, which allows installing either Linux or Windows onto the onboard eMMC flash. Preparations * Insert TQ SD card into SD slot. * Set DIP switches to text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/installimage?rev=1738063030&do=diff Installation of system software on the eMMC flash ATTENTION: The following modifications must be applied to the MBa28 prototype board: * Fix pull-ups boot mode * Fix PHY addresses * Fix pull-downs TFT display Installation of the MFG-Tool First of all the MFG-Toolkit from text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/k2635?rev=1738063030&do=diff First steps in TQMa28 BSP (Kernel version 2.6.35.13) Current builddates * U-Boot 2009.08 : Sep 24 2012 - 10:58:05 * Kernel 2.6.35.13: Sep 24 11:06:44 CEST 2012 Previous builddates * U-Boot 2009.08 : <initial release> * Kernel 2.6.35.13: <initial release> text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/known_issues?rev=1738063030&do=diff Known issues Flickering / jumping display contents on USB connect Symptom Display contents flickers or gets (either temporarily or permanently) shifted sideways when connecting an USB device. Reason Calls to blank_panel() in mxsfb.c apparently confuse the i.MX28 display controller. text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/konfiguration_uboot?rev=1738063030&do=diff Configuring U-Boot Default settings IP-Address 172.16.135.170 Netmask 255.255.255.0 Default-Gateway 172.16.135.254 MAC-Address 02:00:01:00:00:01 IP-Mode Kernel static LC-Display FG0700K5DSSWBG01 root password root The TCP/IP parameters can be changed in U-Boot. Therefore a serial connection to the MBa28 board is required. Interrupt the boot process by pressing any key. Set new values for the corresponding variables and save the environment: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/qtdemo?rev=1738063030&do=diff Qt-Embedded demo application The custom rootfs image contains a Qt-Embedded demonstration. To launch the demo you need to pass rundemo=QT to the kernel as a kernel parameter during boot. To accomplish this issue the following command at the U-Boot prompt: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/rescue_mode_ohne_dip?rev=1738063030&do=diff Rescue mode without DIP switches In case a complete new firmware image (U-Boot, linux kernel, root filesystem) is to be installed, but the the rescue mode cannot be enabled because the DIP switches are not accessible, a workaround is to invalidate the master boot record (MBR) of the eMMC flash: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/rescue_mode_without_dip?rev=1738063030&do=diff Firmware reset In case a complete new firmware image (U-Boot, linux kernel, root filesystem) is to be installed, but the the rescue mode cannot be enabled because the DIP switches are not accessible, a workaround is to invalidate the master boot record (MBR) of the eMMC flash: text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/update_linux_kernel_running?rev=1738063030&do=diff Update of the linux kernel via network The linux kernel can be updated while the system is still operational. For this the kernel image is copied to the target system using SCP (Linux scp-command or WinSCP for Windows), for example to “/tmp/uImage”. Afterwards the following command has to be executed text/html 2025-01-28T11:17:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://support.tq-group.com/en/tqma28/vm?rev=1738063030&do=diff TQ Ubuntu VMware Virtual Machine (VM) image Used versions * VMware player 3.0.0 build-203739 * Host system: Windows XP Professional SP3 32 bit Download VMware player To download the VMware player you first have to register at the download page. The VM images were created with version 3.0.0.