From 281e00a3be453a169d854f824a460359d10f92bb Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 1 Aug 2004 22:48:16 +0000 Subject: * Code cleanup * Patch by Sascha Hauer, 28 Jun: - add generic support for Motorola i.MX architecture - add support for mx1ads, mx1fs2 and scb9328 boards * Patches by Marc Leeman, 23 Jul 2004: - Add define for the PCI/Memory Buffer Configuration Register - corrected comments in cpu/mpc824x/cpu_init.c * Add support for multiple serial interfaces (for example to allow modem dial-in / dial-out) --- doc/README.serial_multi | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 doc/README.serial_multi (limited to 'doc/README.serial_multi') diff --git a/doc/README.serial_multi b/doc/README.serial_multi new file mode 100644 index 0000000000..1d73376b2c --- /dev/null +++ b/doc/README.serial_multi @@ -0,0 +1,37 @@ +The support for multiple serial interfaces as implemented is mainly +intended to allow for modem dial-in / dial-out while still being able +to use a serial console on a (different) serial port. + +At the moment, the ports must be split on a SMC and a SCC port on a +8xx processor; other configurations are not (yet) supported. + +Support for hardware handshake has not been implemented yet (but is +in the works). + +*) The default console depends on the keys pressed: + - SMC if keys not pressed (modem not enabled) + - SCC if keys pressed (modem enabled) + +*) The console can be switched to SCC by any of the following commands: + + setenv stdout serial_scc + setenv stdin serial_scc + setenv stderr serial_scc + +*) The console can be switched to SMC by any of the following commands: + + setenv stdout serial_smc + setenv stdin serial_smc + setenv stderr serial_smc + +*) If a file descriptor is set to "serial" then the current serial device +will be used which, in turn, can be switched by above commands. + +*) The baudrate is the same for all serial devices. But it can be switched +just after switching the console: + + setenv sout serial_scc; setenv baudrate 38400 + +After that press 'enter' at the SCC console. Note that baudrates <38400 +are not allowed on LWMON with watchdog enabled (see CFG_BAUDRATE_TABLE in +include/configs/lwmon.h). -- cgit v1.2.3