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add more info to README.md

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Jaroslav Kysela 2015-03-27 14:56:26 +01:00
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@ -5,3 +5,26 @@ Requirements:
- git, python
- STLinux 2.4 (all-sh4-glibc) - http://www.stlinux.com - installed to /opt/STM/STLinux-2.4/
- fakeroot package/tools
Compilation:
- just type 'make'
- kernel with rootfs is in kernel/arch/sh/boot/uImage.gz
Booting uImage.gz on Inverto IDL-400s/Grundig GSS.BOX/Inverto IDL-400S from USB:
- connect TTL USB serial adapter to J3 connector (4 pins at the power supply)
- pin 1 = 3.6V (do not use), pin 2 = GND, pin 3 = RXD (STM CPU), pin 4 = TXD (STM CPU)
- parameters: 115200,8N1
- press 'Enter' when you turn on the box (you have only one second) to get 'idl4k> ' prompt
- modify bootargs (optional - for original firmware)
set bootargs=console=ttyAS0,115200
- set debugfw environment variable
set debugfw "debugfw=usb start;usb start;fatload usb 0 0x84000000 uimage.gz;set bootargs console=ttyAS0,115200 bigphysarea=20000 initrd=/sbin/init;bootm 0x84000000"
- you may type 'save' to store this settings permanently
- to execute the debugfw type 'run debugfw'
- note that the USB stick should be in the first (upper) USB connector