Hello! I wonder if someone have some recomandation for me when selecting a bootlader who have the abilety to load and boot Linux or WinCE? The target is a PXA270 with only USB. So I have to load the image on USB.
Amund
"Amund Glomsås" schrieb im Newsbeitrag news:4212fc8d$ snipped-for-privacy@news.wineasy.se...
I would guess that if you need a boot loader which prepares CPU, Memory and whatever peripheral configuration needs to be enabled suitable for both operating systems you'll have to write your own. May be you can start with some linux code and - at an appropriate point - run windows CE which should come with a boot loader (not opensource though) for the platform. these are frequently located in the BSP (board support package). /Roland
and
though)
Why not run two boot loaders? Reset into one of the boot loaders, and if you need the other O/S load the other bootloader. The AT91RM9200 can boot either from a parallel flash, a serial flash or an EEPROM. If you have a micro emulating the EEPROM, then the micro can supply either boot 1, or boot 2 from the internal flash. If you want to switch, then send a message from boot 1 to the micro which will set an internal EEPROM byte, and after a reset, the micro will deliver the iother boot.
On the AT91RM9200EK Evaluation Kit, you have a jumper. If you set the jumper in one position, it boots Linux, if you set it in another position, you boot WinCE.
This is accomplished using the boot mode select (BMS) input. Set "low", the CPU boots Linux from a parallel flash. Set "high", the CPU boots from the internal boot ROM allowing loading in a second level boot from a serial memory.
-- Best Regards, Ulf Samuelsson ulf@a-t-m-e-l.com This message is intended to be my own personal view and it may or may not be shared by my employer Atmel Nordic AB
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.