Android Image Flashing / Burning
Boot options
Boot options of the Android:
1. Directly from SD card
2. U-Boot boots from NAND flash, and the rest of the Android images from on-SOM eMMC (when available)
After successfull build, the image are generated as per build
Images created by the Android build for Variscite MX6 system
Path: out/target/product/var_mx6/
Image |
Description |
---|---|
system.img | Android system image file. SOM agnostics. |
u-boot-var-imx6-nand.img | U-Boot for nand used in eMMC boot. SOM agnostics. |
u-boot-var-imx6-sd.img | U-Boot for SD card boot. SOM agnostics. |
boot-<name>-<touch>.img recovery-<name>-<touch>.img |
|
<name> is one of: | som-mx6q - Supports VAR-SOM-MX6Q and VAR-SOM-MX6D som-mx6dl - Supports VAR-SOM-MX6DL and VAR-SOM-MX6S som-solo - Supports VAR-SOM-SOLO and VAR-SOM-DUAL |
<touch> - is "r" or "c" | r = resistive touch display c = capacitive touch dispaly |
Setup Name |
Images Names |
SOM type |
Carrier Board type |
LCD Type |
Evaluation Kit name |
---|---|---|---|---|---|
som-mx6qp-c | boot-som-mx6qp-c.img, recovery-som-mx6qp-c.img |
VAR-SOM-MX6_V2 (Quad Plus) | VAR-MX6CustomBoard | Capacitive touch | VAR-DVK-MX6_V2-PRO, VAR-STK-MX6_V2 |
som-mx6qp-r | boot-som-mx6qp-r.img, recovery-som-mx6qp-r.img |
VAR-SOM-MX6_V2 (Quad Plus) | VAR-MX6CustomBoard | Resistive touch | VAR-DVK-MX6_V2, VAR-STK-MX6_V2 |
som-mx6qp-vsc | boot-som-mx6qp-vsc.img, recovery-som-mx6qp-vsc.img |
VAR-SOM-MX6_V2 (Quad Plus) | VAR-SOLOCustomBoard | Capacitive LVDS touch | N/A |
som-mx6q-c | boot-som-mx6q-c.img, recovery-som-mx6q-c.img |
VAR-SOM-MX6_V2 (Quad / Dual) | VAR-MX6CustomBoard | Capacitive touch | VAR-DVK-MX6_V2-PRO, VAR-STK-MX6_V2 |
som-mx6q-r | boot-som-mx6q-r.img, recovery-som-mx6q-r.img |
VAR-SOM-MX6_V2 (Quad / Dual) | VAR-MX6CustomBoard | Resistive touch | VAR-DVK-MX6_V2, VAR-STK-MX6_V2 |
som-mx6q-vsc | boot-som-mx6q-vsc.img, recovery-som-mx6q-vsc.img |
VAR-SOM-MX6_V2 (Quad / Dual) | VAR-SOLOCustomBoard | Capacitive LVDS touch | N/A |
som-mx6dl-c | boot-som-mx6dl-c.img, recovery-som-mx6dl-c.img |
VAR-SOM-MX6_V2 (DualLite/ Solo) | VAR-MX6CustomBoard | Capacitive touch | N/A |
som-mx6dl-r | boot-som-mx6dl-r.img, recovery-som-mx6dl-r.img |
VAR-SOM-MX6_V2 (DualLite/ Solo) | VAR-MX6CustomBoard | Resistive touch | N/A |
som-solo-vsc | boot-som-solo-vsc.img, recovery-som-solo-vsc.img |
VAR-SOM-SOLO / VAR-SOM-DUAL | VAR-SOLOCustomBoard | Capacitive LVDS touch | VAR-DVK-SOLO/DUAL, VAR-STK-SOLO/DUAL |
som-solo-c | boot-som-solo-c.img, recovery-som-solo-c.img |
VAR-SOM-SOLO / VAR-SOM-DUAL | VAR-MX6CustomBoard | Capacitive touch | N/A |
imx6q-var-dart | boot-imx6q-var-dart.img, recovery-imx6q-var-dart.img |
DART-MX6 | VAR-DT6CustomBoard | Capacitive touch | VAR-STK-DT6, VAR-DVK-DT6 |
Flash and boot Android from SD card
Create a bootable SD card
Partition and format SD card, and copy all images
$ sudo ./var-mksdcard.sh -f SETUP_NAME /dev/sdX;sync
- Replace SETUP_NAME with the actual desired setup name accrding to the second table in the "images created" section.
- Replace /dev/sdX with your true device, You can identify it with dmesg.
Boot From SD card
- Power-off the board.
- Insert the SD card into the SD card slot of the carrier board (DVK)
- Make sure the Boot Mode is set to SD card: see Setting the Boot Mode section
- Power up the board - it will boot into Linux from the SD card
Flash and boot Android from eMMC
eMMC based system consist of:
- SPL and U-Boot on NAND flash
- Rest of Android images in eMMC
Preparing images
All Android built images but system.img are ready for flashing out of the default build.
The default system.img format is suitable for flashing using fastboot, and must be modified for flashing using 'dd'.
$ cd out/target/product/var_mx6 $ simg2img system.img system_raw.img
Flashing Android from Linux shell (when the primary installation android)
An example of flashing eMMC, can be found here.
Follow the following steps instructions above:
1. Preparing a rescue SD card;
2. Flash from command line (use the install_android.sh script)
Further, follow the steps described in paragraph "Flashing Android with USB Fastboot"
Flashing Android with USB Fastboot
Install tools on host
$ sudo apt-get install android-tools-adb android-tools-fastboot
Note: Make sure you built Android for eMMC
Connect the target with host PC at fastboot mode:
- Connect a USB OTG cable from the target board OTG port to a your host machine USB HOST port.
- Power up the board and hit return/space to stop the boot at U-Boot.
- type fastboot usb0 in the U-Boot command line.
On the Host PC:
$ sudo `which fastboot` flash boot out/target/product/var_mx6/boot-SETUP_NAME.img $ sudo `which fastboot` flash recovery out/target/product/var_mx6/recovery-SETUP_NAME.img $ sudo `which fastboot` flash system out/target/product/var_mx6/system.img $ sudo `which fastboot` reboot
Replace SETUP_NAME with the actual desired setup name accrding to the second table in the "images created" section.
Android recovery mode
Enter board in Android Recovery mode
Turn on the device by holding down the "back" button must be held until the end of the boot and logged in "Android Recovery" mode.
- To switch between menu items, use a short press of any button (except RESET) or a short touch touchscreen;
- To select an item, use long press any button (except RESET) or long touch the touchscreen;
Update Android firmware
Generate OTA packages For generating "OTA" packages, use the following commands:
$ cd /
# if Android for SD card $ make -j4 BUILD_TARGET_DEVICE=sd otapackage 2>&1 | tee build1-1.log # if Android for eMMC $ make -j4 BUILD_TARGET_DEVICE=emmc otapackage 2>&1 | tee build1-1.log
Install OTA package to device
- Enter to Android Recovery mode
- Select menu item "apply update from ADB"
- To the host system, perform the following command:
$ out/host/linux-x86/bin/adb sideload out/target/product/var_mx6/var_mx6-ota-<data>-<image-id>.zip
- reboot this device
Note: Real example name for OTA package: out/target/product/var_mx6/var_mx6-ota-20160331-som-mx6q-c.zip