From mboxrd@z Thu Jan 1 00:00:00 1970 From: Detlev Zundel Date: Mon, 30 Jul 2007 16:17:41 +0200 Subject: [U-Boot-Users] How to add Timer Interrupt to u-boot? In-Reply-To: <001301c7d026$259a6ac0$3400a8c0@nmarobert> (Robert's message of "Fri\, 27 Jul 2007 16\:14\:14 +0800") References: <001301c7d026$259a6ac0$3400a8c0@nmarobert> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Robert, > Everybody knows how to add Timer Interrupt to the u-boot? > I wrote a fuction called timer0_isr(), and wanted to add it to Uboot, > but I didn't know what to do, Does the uboot has a funciton like > function request_irq() in linux kernel? As Jerry told you, U-Boot generally avoids using interrupts. For some architectures however we have code to allow using interrupts, e.g. from standalone applications. You can look at examples/interrupt.c which effectively was written with cpu/mpc5xxx/interrupts.c in mind. The latter was of course derived from the Linux version so it shouldn't be a big problem to do something similar for other architectures. Cheers Detlev -- Once the implementation is up and running, it is still a trick to keep it running. In a normal, closed implementation, this is not a problem; in a system with metaobject protocols [..] there is the potential for spectacular failure modes if certain situations are not properly anticipated. -- The Art of the Metaobject Protocol -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de