Re: [U-Boot] Want to study U-Boot code
My thanks for your saying, Javier. I will be starting from reading the README and begin search through the code. When I get further question, I will come back here. Thahks again. -woody On Sat, Jan 26, 2013 at 03:11:29PM +0100, Javier Martinez Canillas wrote: > On Sat, Jan 26, 2013 at 2:07 PM, Woody Wu wrote: > > ??? 2013-1-26 AM5:27???"Robert P. J. Day" ? > >> > >> On Fri, 25 Jan 2013, Wolfgang Denk wrote: > >> > >> > Dear Woody Wu, > >> > > >> > In message > c5y...@mail.gmail.com> you wrote: > >> > > > >> > > I want to firstly get a picture to basically understand how u-boot > >> > > work, especially on an ARM9 based board. I think not everyone who > >> > > want to understand u-boot has to read the full code. Thank. > >> > > >> > This depends on your definition of "understanding". On a highlevel, > >> > you might start with reaing and digesting the manual, eventually > >> > trying out how U-Boot works on some (real or emulated) board. > >> > >> if i can jump in, a good way to start playing is to configure and > >> build for the "sandbox" architecture so you can run it on your x86 > >> system. for the benefit of a couple friends, i whipped together a > >> wiki page for that here: > >> > >> http://www.crashcourse.ca/wiki/index.php/U-Boot_sandbox > >> > >> very simple but enough to get you started, and you can match up > >> running the commands with the underlying code. > >> > >> rday > > > > Sandbox looks amazing! Thanks share me with this info. But i still > > wondering that if u-boot doesnt have any book or document explaining how it > > work and how it organized, how pepople can join its development? > > > > Hello Woody, > > I recommend you to start with the README file since it gives you a high level > overview of U-Boot and some very good specifics too. > > Since you are asking about U-Boot source code organization specifically, > you can take a look at the "Directory Hierarchy" section of the README file. > > But as others stated before, you should first narrow your search to an area > that > interests you. I found that "scratching your own itch" is the best way to > learn. > > There is no documentation that can replace the source code itself, remember > that a good documentation shouldn't say how thinks are made (for that > you have the code) > but why things were made in a certain way and the design decisions behind > that. > > Finally, if you think that the documentation is not enough, feel free to send > patches to improve that :-) > > As Confusios said "I heard and I forget. I see and I remember. I do > and I understand" > > Hope it helps, > Javier -- woody I can't go back to yesterday - because I was a different person then. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
Dear Javier Martinez Canillas, In message you wrote: > > There is no documentation that can replace the source code itself, remember > that a good documentation shouldn't say how thinks are made (for that > you have the code) > but why things were made in a certain way and the design decisions behind > that. ...and at least the most important design rules are documented on the U-Boot web page... Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de The average woman would rather have beauty than brains, because the average man can see better than he can think. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
On Sat, Jan 26, 2013 at 2:07 PM, Woody Wu wrote: > 在 2013-1-26 AM5:27，"Robert P. J. Day" 写道： >> >> On Fri, 25 Jan 2013, Wolfgang Denk wrote: >> >> > Dear Woody Wu, >> > >> > In message c5y...@mail.gmail.com> you wrote: >> > > >> > > I want to firstly get a picture to basically understand how u-boot >> > > work, especially on an ARM9 based board. I think not everyone who >> > > want to understand u-boot has to read the full code. Thank. >> > >> > This depends on your definition of "understanding". On a highlevel, >> > you might start with reaing and digesting the manual, eventually >> > trying out how U-Boot works on some (real or emulated) board. >> >> if i can jump in, a good way to start playing is to configure and >> build for the "sandbox" architecture so you can run it on your x86 >> system. for the benefit of a couple friends, i whipped together a >> wiki page for that here: >> >> http://www.crashcourse.ca/wiki/index.php/U-Boot_sandbox >> >> very simple but enough to get you started, and you can match up >> running the commands with the underlying code. >> >> rday > > Sandbox looks amazing! Thanks share me with this info. But i still > wondering that if u-boot doesnt have any book or document explaining how it > work and how it organized, how pepople can join its development? > Hello Woody, I recommend you to start with the README file since it gives you a high level overview of U-Boot and some very good specifics too. Since you are asking about U-Boot source code organization specifically, you can take a look at the "Directory Hierarchy" section of the README file. But as others stated before, you should first narrow your search to an area that interests you. I found that "scratching your own itch" is the best way to learn. There is no documentation that can replace the source code itself, remember that a good documentation shouldn't say how thinks are made (for that you have the code) but why things were made in a certain way and the design decisions behind that. Finally, if you think that the documentation is not enough, feel free to send patches to improve that :-) As Confusios said "I heard and I forget. I see and I remember. I do and I understand" Hope it helps, Javier ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
在 2013-1-26 AM5:27，"Robert P. J. Day" 写道： > > On Fri, 25 Jan 2013, Wolfgang Denk wrote: > > > Dear Woody Wu, > > > > In message you wrote: > > > > > > I want to firstly get a picture to basically understand how u-boot > > > work, especially on an ARM9 based board. I think not everyone who > > > want to understand u-boot has to read the full code. Thank. > > > > This depends on your definition of "understanding". On a highlevel, > > you might start with reaing and digesting the manual, eventually > > trying out how U-Boot works on some (real or emulated) board. > > if i can jump in, a good way to start playing is to configure and > build for the "sandbox" architecture so you can run it on your x86 > system. for the benefit of a couple friends, i whipped together a > wiki page for that here: > > http://www.crashcourse.ca/wiki/index.php/U-Boot_sandbox > > very simple but enough to get you started, and you can match up > running the commands with the underlying code. > > rday Sandbox looks amazing! Thanks share me with this info. But i still wondering that if u-boot doesnt have any book or document explaining how it work and how it organized, how pepople can join its development? > > -- > > > Robert P. J. Day Ottawa, Ontario, CANADA > http://crashcourse.ca > > Twitter: http://twitter.com/rpjday > LinkedIn: http://ca.linkedin.com/in/rpjday > ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
On Fri, 25 Jan 2013, Wolfgang Denk wrote: > Dear Woody Wu, > > In message > you > wrote: > > > > I want to firstly get a picture to basically understand how u-boot > > work, especially on an ARM9 based board. I think not everyone who > > want to understand u-boot has to read the full code. Thank. > > This depends on your definition of "understanding". On a highlevel, > you might start with reaing and digesting the manual, eventually > trying out how U-Boot works on some (real or emulated) board. if i can jump in, a good way to start playing is to configure and build for the "sandbox" architecture so you can run it on your x86 system. for the benefit of a couple friends, i whipped together a wiki page for that here: http://www.crashcourse.ca/wiki/index.php/U-Boot_sandbox very simple but enough to get you started, and you can match up running the commands with the underlying code. rday -- Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
Dear Woody Wu, In message you wrote: > > I want to firstly get a picture to basically understand how u-boot work, > especially on an ARM9 based board. I think not everyone who want to > understand u-boot has to read the full code. Thank. This depends on your definition of "understanding". On a highlevel, you might start with reaing and digesting the manual, eventually trying out how U-Boot works on some (real or emulated) board. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Fascinating is a word I use for the unexpected. -- Spock, "The Squire of Gothos", stardate 2124.5 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
在 2013-1-25 PM7:35，"Marek Vasut" 写道： > > Dear Woody Wu, > > > On Fri, Jan 25, 2013 at 12:30:43AM +0100, Marek Vasut wrote: > > > Dear Woody Wu, > > > > > > > Hi, List > > > > > > > > Is there a book or web document to help start to understand how U-Boot > > > > works? > > > > > > There's a doc/ directory in the u-boot sourcecode. > > > > Is there a guide/suggestion to the reading order of these docs? You > > know, there is not a index file. Thanks. > > The question is -- what do you want to do? If "Study u-boot code" is the answer, > just dive in ;-) > > Best regards, > Marek Vasut I want to firstly get a picture to basically understand how u-boot work, especially on an ARM9 based board. I think not everyone who want to understand u-boot has to read the full code. Thank. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
Dear Woody Wu, > On Fri, Jan 25, 2013 at 12:30:43AM +0100, Marek Vasut wrote: > > Dear Woody Wu, > > > > > Hi, List > > > > > > Is there a book or web document to help start to understand how U-Boot > > > works? > > > > There's a doc/ directory in the u-boot sourcecode. > > Is there a guide/suggestion to the reading order of these docs? You > know, there is not a index file. Thanks. The question is -- what do you want to do? If "Study u-boot code" is the answer, just dive in ;-) Best regards, Marek Vasut ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
On Fri, Jan 25, 2013 at 12:30:43AM +0100, Marek Vasut wrote: > Dear Woody Wu, > > > Hi, List > > > > Is there a book or web document to help start to understand how U-Boot > > works? > > There's a doc/ directory in the u-boot sourcecode. > Is there a guide/suggestion to the reading order of these docs? You know, there is not a index file. Thanks. -- woody I can't go back to yesterday - because I was a different person then. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] Want to study U-Boot code
Dear Woody Wu, > Hi, List > > Is there a book or web document to help start to understand how U-Boot > works? There's a doc/ directory in the u-boot sourcecode. > Thanks! Best regards, Marek Vasut ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] Want to study U-Boot code
Hi, List Is there a book or web document to help start to understand how U-Boot works? Thanks! -- woody I can't go back to yesterday - because I was a different person then. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
