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en:c1_tips [2015/02/23 11:05]
charles.park [How to change U-boot configuration by BOOT.INI]
en:c1_tips [2016/01/12 16:20]
joy.cho [How to change the value of hdmimode]
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 +====== Tips for ODROID-C1 ======
 +This page introduce you an useful tips to use **ODROID-C1**.
 +----
 +====== How to change HDMI output resolution ======
 +**ODROID-C1** can support various resolution on HDMI output, you can select one of supported resolutions for your display (LCD monitor or TV).
 +<WRAP left round tip 70%>
 +Please make sure the resolution you select can be supported by your display before you start. Otherwise you would be hard to recover the resolution again.
 +</​WRAP>​
 +<WRAP center round box 60%>
 +Supported resolutions at this moment (2014-12-15)
 +  - 1920x1200 (WUXGA)
 +  - 1920x1080 (1080p)
 +  - 1280x720 (720p)
 +  - 720x480 (480p)
 +  - 720x576 (576p)
 +  - 1280x800 (800p for ODROID-VU)
 +  - 1280x1024 (SXGA)
 +  - 800x480 (WVGA)
 +  - 640x480 (VGA)
 +</​WRAP>​
  
 +
 +
 +===== Android =====
 +We provide you a simple but useful application,​ **ODROID Utility**. This helps you to change the resolution by menu as below and you can select one of them for your display. Once you select one, click the button **Apply and Reboot**. Then your **ODROID-C1** will restart with new resolution.
 +{{:​en:​utility_resolution.png?​600|}}
 +===== Linux / Ubuntu =====
 +Coming soon...
 +===== Lowlevel Change =====
 +This section introduce you to change the resolution by manual, this would be helpful if you are failure to change the resolution and not able to sett the face of **ODROID-C1**.
 +
 +The fact what initiate the resolution is from **U-boot** and the environment key is **hdmimode**. Probably your U-boot would have the one like this by default.
 +<​code>​
 +odroidc#​print hdmimode
 +hdmimode=720p
 +</​code>​
 +This will be passed to Linux kernel by **bootargs** just before Linux kernel is started. Here is the default value of **bootcmd** which starts Linux kernel. As you see, **hdmimode** is passing as boot argument.
 +<​code>​
 +odroidc#​print bootcmd
 +bootcmd=cfgload;​setenv bootargs root=/​dev/​mmcblk0p2 rw console=ttyS0,​115200n8 no_console_suspend vd
 +accfg=${vdac_config} logo=osd1,​loaded,​${fb_addr},​${outputmode},​full hdmimode=${hdmimode} cvbsmode=$
 +{cvbsmode} hdmitx=${cecconfig} androidboot.serialno=${fbt_id#​};​ movi read boot 0 0x12000000;​movi re
 +ad dtb 0 0x12800000;​bootm 0x12000000 - 0x12800000
 +</​code>​
 +==== How to change the value of hdmimode ====
 +There are three ways to change **hdmimode** to change the resolution, you can replace **1080p** with the other resolution you wish to change for your display.
 +=== U-boot ===
 +If you are able to get into U-boot, this is simply possible with 3 commands below. This will change the resolution value and restart the board.
 +<​code>​
 +setenv hdmimode 1080p
 +saveenv
 +reset
 +</​code>​
 +=== Android shell ===
 +If you are able to use **adb shell**, then you can do these command to change **hdmimode**. This will change the resolution value and restart the board as well.
 +This scheme is only available when booting with '​boot.ini'​ is not used.
 +<​code>​
 +# fw_setenv hdmimode 1080p
 +# reboot
 +</​code>​
 +=== Boot.ini ===
 +You also can boot with **boot.ini** without changing U-boot environment values permanently. If **boot.ini** is existed in FAT partition **ODROID-C1** does boot with it first, unless boot with default setting stored in U-boot environment. You can download the file below and copy into your FAT partition.
 +<file ini boot.ini>​
 +ODROIDC-UBOOT-CONFIG
 +
 +setenv hdmimode 1080p
 +setenv bootargs "​root=/​dev/​mmcblk0p2 rw console=ttyS0,​115200n8 no_console_suspend vdaccfg=${vdac_config} logo=osd1,​loaded,​${fb_addr},​${outputmode},​full hdmimode=${hdmimode} cvbsmode=${cvbsmode} hdmitx=${cecconfig} androidboot.serialno=${fbt_id#​}"​
 +setenv bootcmd "movi read boot 0 0x12000000; movi read dtb 0 0x12800000; bootm 0x12000000 - 0x12800000"​
 +run bootcmd
 +</​file>​
 +====== How to change U-boot configuration by BOOT.INI ======
 +----
 +In order to support easy boot loader setup, ODROID-C1 also support **boot.ini** as well as previous ODROID boards. So you can easily list up the commands what you want to executed in U-boot rather than the default. Here is the example to boot Ubuntu.
 +
 +=== Android boot.ini example ===
 +<file ini boot.ini>​
 +ODROIDC-UBOOT-CONFIG
 +
 +# Possible screen resolutions
 +# Uncomment only a single Line! The line with setenv written.
 +# At least one mode must be selected.
 +
 +# setenv m "​vga" ​          # VGA 640x480
 +# setenv m "​480p" ​         # 480p 720x480
 +# setenv m "​576p" ​         # 576p 720x576
 +# setenv m "​800x480p60hz" ​ # WVGA 800x480
 +# setenv m "​720p" ​         # 720p 1280x720
 +# setenv m "​800p" ​         # 800p(WXGA) 1280x800
 +# setenv m "​1024x768p60hz"​ # XGA 1024x768
 +# setenv m "​sxga" ​         # SXGA 1280x1024
 +setenv m "​1080p" ​        # 1080P 1920x1080
 +# setenv m "​1920x1200" ​    # 1920x1200
 +
 +# HDMI/DVI Mode Configuration
 +setenv vout_mode "​hdmi"​
 +# setenv vout_mode "​dvi"​
 +
 +# UHS Card Configuration
 +# Uncomment the line below to __DISABLE__ UHS-1 MicroSD support
 +# This might break boot for some brand/​models of cards.
 +setenv disableuhs "​disableuhs"​
 +
 +setenv bootargs "​root=/​dev/​mmcblk0p2 rw console=ttyS0,​115200n8 no_console_suspend vdaccfg=${vdac_config} logo=osd1,​loaded,​${fb_addr},​${outputmode},​full hdmimode=${m} cvbsmode=${cvbsmode} hdmitx=${cecconfig} vout=${vout_mode} ${disableuhs} androidboot.serialno=${fbt_id#​}"​
 +setenv bootcmd "movi read boot 0 0x12000000; movi read dtb 0 0x12800000; bootm 0x12000000 - 0x12800000"​
 +run bootcmd
 +</​file>​
 +
 +=== Linux boot.ini example ===
 +<file ini boot.ini>​
 +ODROIDC-UBOOT-CONFIG
 +
 +# Possible screen resolutions
 +# Uncomment only a single Line! The line with setenv written.
 +# At least one mode must be selected.
 +
 +# setenv m "​vga" ​         # VGA 640x480
 +# setenv m "​480p" ​        # 480p 720x480
 +# setenv m "​576p" ​        # 576p 720x576
 +# setenv m "​800x480p60hz"​ # WVGA 800x480
 +# setenv m "​720p" ​        # 720p 1280x720
 +# setenv m "​800p" ​        # 800p(WXGA) 1280x800
 +# setenv m "​sxga" ​        # SXGA 1280x1024
 +setenv m "​1080p" ​       # 1080P 1920x1080
 +# setenv m "​1920x1200" ​   # 1920x1200
 +
 +# HDMI/DVI Mode Configuration
 +setenv vout_mode "​hdmi"​
 +# setenv vout_mode "​dvi"​
 +
 +# HDMI BPP Mode
 +setenv m_bpp "​32"​
 +# setenv m_bpp "​16"​
 +
 +# UHS Card Configuration
 +# Uncomment the line below to __DISABLE__ UHS-1 MicroSD support
 +# This might break boot for some brand/​models of cards.
 +setenv disableuhs "​disableuhs"​
 +
 +setenv bootargs "​console=ttyS0,​115200n8 root=UUID=e139ce78-9841-40fe-8823-96a304a09859 rootwait ro no_console_suspend vdaccfg=0xa000 logo=osd1,​loaded,​0x7900000,​720p,​full dmfc=3 cvbsmode=576cvbs hdmimode=${m} m_bpp=${m_bpp} vout=${vout_mode} ${disableuhs}"​
 +setenv bootcmd "​fatload mmc 0:1 0x21000000 uImage; fatload mmc 0:1 0x22000000 uInitrd; fatload mmc 0:1 0x21800000 meson8b_odroidc.dtb;​ bootm 0x21000000 0x22000000 0x21800000"​
 +run bootcmd
 +</​file>​
 +===== Board Identifier =====
 +This is the keyword to identify the correct **BOOT.INI** as per board. For **ODROID-C1**,​ any **BOOT.INI** must contain **ODROIDC-UBOOT-CONFIG** and other commands must be below this.
 +===== U-boot commands =====
 +You can describe multiple commands of U-boot from the next line of **ODROIDC-UBOOT-CONFIG**. The commands are only restricted within the commands enabled by the running U-boot.
 +====== How to replace booting logo ======
 +**ODROID-C1** can shows booting logo to the display till target O/S is started.
 +===== LOGO file format =====
 +Currently, we support **24-bit Windows BMP image** only and default size is **1280x720**. You can display any other size of logo file, but it will be showen at the left-top corner.
 +===== Using BOOT.INI =====
 +You can add the commands to your **boot.ini** before **bootcmd** is executed. Note that you can replace the logo file name **hardkernel-720.bmp** with yours and it must be in FAT (BOOT) partition.
 +<​code>​
 +logo size ${outputmode}
 +video open
 +video clear
 +video dev open ${outputmode}
 +fatload mmc 0 ${loadaddr_logo} hardkernel-720.bmp
 +bmp display ${loadaddr_logo}
 +bmp scale
 +</​code>​
 +===== Using FASTBOOT =====
 +The logo partition is internally assigned in **U-boot** itself, please refer [[http://​odroid.com/​dokuwiki/​doku.php?​id=en:​c1_partition_table#​android_partition_table|this]] for detail. This works just for **Android Users** since Linux/​Ubuntu uses the logo sectors for **BOOT** partition.
 +
 +Firstly, you must get into your **U-boot** command line while pressing any key when your **ODROID-C1** is powered up. And execute **fastboot** command from **U-boot** and connect with your desktop using USB cable.
 +<​code>​
 +odroidc#​fastboot
 +</​code>​
 +Next, run **fastboot** command from your desktop.
 +<​code>​
 +$ fastboot flash logo hardkernel-720.bmp
 +</​code>​
en/c1_tips.txt ยท Last modified: 2017/11/14 10:48 by codewalker
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