Make Hackable:1 the default boot

In order to boot your sd card by default, we need to chang a few things in u-boot.

To do that you need to connect to the bootloader prompt via USB or via serial console (with Debug Board).

We will do it via USB.

first you need to prepare the FR to receive order for uboot via usb :

press the power button
press and hold the AUX button
keep power and AUX pressed until menu is up
choose the third entry with AUX button and press power

(Just to precise, when you do that you see the NAND memory, the one we will change, to access NOR or NAND see http://wiki.openmoko.org/wiki/Booting_the_Neo_FreeRunner#Log_into_U-Boot_in_the_NAND_Flash)

second you need to prepare your linux. To connect to the bootloader prompt you need a terminal. cu is often used. But with cu you won't be able to perform copy/paste. Werner Almesberger's "neocon" serial console utility supports rate limiting of the data sent to the device, allowing copy/paste.

We will use it.

svn co http://svn.openmoko.org/developers/werner/neocon/
cd neocon
make

Now boot the Neo on NAND menu (like the previous time) It will declare a new tty device called /dev/ttyACM0.

To connect :

./neocon -t 30 /dev/ttyACM0

and here we go. You've got the bootloader prompt.

If you type :

 GTA02v5 # printenv

It'll answer :

 boot_menu_timeout=60
 bootargs_base=rootfstype=jffs2 root=/dev/mtdblock6 console=ttySAC2,115200 console=tty0 loglevel=4 regular_boot
 bootcmd=setenv bootargs ${bootargs_base} ${mtdparts}; nand read.e 0x32000000 kernel 0x200000; bootm 0x32000000
 bootdelay=5
 menu_1=Boot from microSD (FAT+ext2): setenv bootargs ${bootargs_base} rootfstype=ext2 root=/dev/mmcblk0p2 rootdelay=5 ${mtdparts} ro; mmcinit; fatload mmc 1 0x32000000 ${sd_image_name}; bootm 0x32000000
 menu_4=Set console to USB: setenv stdin usbtty; setenv stdout usbtty; setenv stderr usbtty
 menu_5=Set console to serial: setenv stdin serial; setenv stdout serial; setenv stderr serial
 menu_6=Reboot: reset
 menu_8=Power off: neo1973 power-off
 sd_image_name=uImage.bin
 stderr=usbtty
 stdin=usbtty
 stdout=usbtty
 usbtty=cdc_acm
 mtdids=nor0=physmap-flash,nand0=neo1973-nand
 pcb_rev=0x000
 pcf50633_int1=0x80
 pcf50633_int2=0x02
 mtdparts=mtdparts=physmap-flash:-(nor);neo1973-nand:0x00040000(u-boot),0x00040000(u-boot_env),0x00800000(kernel),0x000a0000(splash),0x00040000(factory),0x0f6a0000(rootfs)
 partition=nor0,0
 mtddevnum=0
 mtddevname=nor
 Environment size: 1093/262140 bytes

What interest us is to change bootcmd which is the default boot command. to do that we type (if you use neocon I recomand to copy/paste):

 GTA02v5 # setenv bootcmd setenv bootargs ${bootargs_base} rootfstype=ext2 root=/dev/mmcblk0p2 rootdelay=5 ro\; mmcinit\; fatload mmc 1 0x32000000 ${sd_image_name}\; bootm 0x32000000

now we add a entry to be able to boot our flash memory (just in case) .

 GTA02v5 # setenv menu_1 Boot from flash memory : setenv bootargs ${bootargs_base} ${mtdparts}\; nand read.e 0x32000000 kernel 0x200000\; bootm 0x32000000

Verify that everything is all right with :

 GTA02v5 # printenv

and now save the nand memory :

 GTA02v5 # saveenv

You can now shutdown your FR and boot normaly, it should be H:1 !

Remember, the NOR bootlorder was not touched. So if your NAND bootloader is harmed, you can use the NOR one.