From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200309300155.UAA03360@lists.linuxppc.org> From: "Yuxiao Xi" To: linuxppc-embedded Subject: UART prints very slow Mime-Version: 1.0 Content-Type: text/plain Date: Tue, 30 Sep 2003 10:07:23 +0800 Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: 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/