On 6/21/06, Deepak Pandey <deepak.pandey@xxxxxxxxx> wrote:
Jinesh K J wrote: > On 6/20/06, Deepak Pandey <deepak.pandey@xxxxxxxxx> wrote: >> Hi all, >> I am trying to read the line status register (LSR) of uart chip >> SC16C2552 but recieving a read error .Can anyone help me out with why >> such is happening .Is there any control register which enables the >> reading operation though it is not mentioned in the chips datasheet. >> > > isn't LSR readable in your chip specifications? chip datasheets > normally specify what all i/o operations can be perfromed upon its > registers and how the device will respond to them. yes, as per UART chip specification LSR is readable.
have u tried this in user space? its better to try such simple devices from user space at first before going into kernel. also can u post your source code? also, datasheets might sometimes show the pseudo source code for doing all these stuff. u can also try for that. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
