From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3F79CFE2.4030708@mvista.com> Date: Tue, 30 Sep 2003 11:48:02 -0700 From: "Mark A. Greer" MIME-Version: 1.0 To: Yuxiao Xi Cc: linuxppc-embedded Subject: Re: UART prints very slow References: <200309300155.UAA03360@lists.linuxppc.org> In-Reply-To: <200309300155.UAA03360@lists.linuxppc.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Interrupt problem. Double check the irq you specified in the uart setup stuff. Mark -- Yuxiao Xi wrote: >Hello,all, > I am developing my board with CPU MPC8240 and a UART ST16C2552. >I use MontaVista Linux 2.1. Now I have successfully logged in the >shell.But there is a question that I can't resolve:( I am sure that the >UART is successfully initialized except that ST16C2552 is detected as >ST16650.I debugged the UART interrupt and the printk info showed that it >was OK. > >QUESTION: when I input commands such as 'ls', 'cd /dev' on the shell, >the characters of these commands are printed very slow on the screen >and the command execution results as well. I think these commands and >their execution results are printed through UART interrupt.Is MPC8240 >interrupt ACK so slow? BTW: while system booting,the UART prints very >quickly in polling print mode. > >　　　　　　　　Yuxiao Xi >　　　　　　　　xiyuxiao@harbournetworks.com >　　　　　　　　　　2003-09-30 > > > > > > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/