PowerQUICC Processors中的主题 Re: 8548 booting or start up

8548 booting or start up

ravindrakulkarn — Mon, 12 Nov 2012 10:28:08 GMT

Can I get guidelines on how to start the 8548 processor. For example I am expecting something like a sequence in which I should init the peripherals,

This is not having any OS, just the bare bone application.Although it has flash,DDR PCI DUART needed.

Re: 8548 booting or start up

Wei — Tue, 13 Nov 2012 03:31:19 GMT

uboot?

Re: 8548 booting or start up

ravindrakulkarn — Tue, 13 Nov 2012 15:56:30 GMT

u_boot assumes that the hardware is working. This is new design/board (not

standard eval board), then in what sequence do I go to initialize the

various blocks/peripherals?

Re: 8548 booting or start up

TomE — Wed, 21 Nov 2012 01:12:22 GMT

U-Boot is totally in charge of starting up the hardware.

The parts of U-Boot specific to a particular CPU "knows" how to start it up. It usually only enables the things needed to get the Operating System loaded. If you have ADCs and PWM controllers, then they're the problem of the OS Drivers if they're not essential for booting.

If you have custom hardware on your board that needs to be initialised before the OS comes up, then that's 100% your responsibility to design a proper startup sequence, and to add that to the "Board Support" part of the U-Boot sources for your board.

Tom

Re: 8548 booting or start up

ravindrakulkarn — Wed, 21 Nov 2012 04:38:15 GMT

Thanks for your help Tom

Just a question,

Is it possible to load the bootloader code in Codewarrior and be able to

debug it/single step with USB TAP?

Is it possible to compile the source code of uboot using CW tools ( on

Linux or windows)

Thanks a lot for your help.