View source for UBoot recovery for am335 via xmodem

For the programming of the AM335x we take use of the X-Modem, so there is no use of external Hardware except a PC with a com-port.
You also need a Linux distribution for example the [[Virtual Machine for Application Development]] with Debian Jessie

# '''Installation'''
#*installing the Debian package lrzsz
#**<code>sudo apt-get install lrzsz</code>
#*Standard password for VM is '''devel'''
# '''Programing'''
#*'''Download required files here:'''
#*The MLO.byteswap and the uBoot.img are normal uBoot files
#*If you use the Virtual Machine, then don’t import the serial Port because this can cause issues 
#*[[File:Am335 serialport.png]]
#*check which ttyUSBX port is needed for programing <code>$ cd /dev && ls</code>
#*Please change the '''ttyUSBX''' in the following code to the one you need
#*Navigate into the folder where the programing files are located
#*Power on the board and check if it prints "C" on the serial monitor
#**<code>sx -kb u-boot-spl.bin < /dev/ttyUSBX > /dev/ttyUSBX</code>
#*Wait for the message "Trying to boot from UART" on the serial monitor
#**<code>sx -kb u-boot.img < /dev/ttyUSBX > /dev/ttyUSBX</code>
#*Wait for uBoot to boot, if the output stops with "**No partition table - mmc 1 **" you can go on (can take a while)
#**<code>echo 'loady ${loadaddr}' > /dev/ttyUSBX</code>
#*Wait for the message "Ready for binary (ymodem) download to 0x82000000 at 115200 bps..." on the serial monitor
#**<code>sx MLO.byteswap < /dev/ttyUSBX > /dev/ttyUSBX</code>
#*Wait untill the Serial Monitor confirms that the data is sent
#**<code>echo 'sf probe; sf erase 0x0 0x20000; sf write ${loadaddr} 0x0 ${filesize};' > /dev/ttyUSBX</code>
#*Wait for the acknowledge“
#***SF: Detected S25FL216K with page size 256 Bytes, erase size 4 KiB, total 16 MiB
#***SF: 131072 bytes @ 0x0 Erased: OK
#***device 0 offset 0x0, size 0x6794
#***SF: 26516 bytes @ 0x0 Written: OK “
#**<code>echo 'loady ${loadaddr}' > /dev/ttyUSBX</code>
#*Ready for binary (ymode) download to 0x82000000 at 115200 bps...
#**<code>sx u-boot.img < /dev/ttyUSBX > /dev/ttyUSBX</code>
#*Wait till the '''Serial Monitor''' not the programing terminal confirms that the data is sent
#**<code>echo 'sf probe; sf erase 0x20000 0xA0000; sf write ${loadaddr} 0x20000 ${filesize};' > /dev/ttyUSBX</code>
#*Wait for the acknowledge “
#***SF probe; sf erase 0x20000 0xA0000; sf write ${loadaddr} 0x20000 ${filesize};
#***SF: Detected S25FL216K with page size 256 Bytes, erase size 4 KiB, total 16 MiB
#***SF: 655360 bytes @ 0x20000 Erased: OK
#***device 0 offset 0x20000, size 0x60eec
#***SF: 397036 bytes @ 0x20000 Written: OK
#**<code>echo "reset" > /dev/ttyUSBX</code>