mx280:use application uart as a console

yangsong — Mon, 24 Dec 2012 02:29:49 GMT

for debug uart was used as i2c funtion, and i need to configure application uart0 as a console,i do this as the steps listed below

boot from sdcard

1.run ./ltib -m config, change default kernel command line from "noinitrd console=ttyAM0" to "noinitrd console=ttySP0"

2.change inittab startup line from "::respawn:/sbin/getty -L ttyAM0" to "::respawn:/sbin/getty -L ttySP0"

3.enter kernel menuconfig, and enable "support for console on i.MXS application serial port"

4.run ./ltib -p boot_stream.spec -f and ./mk_mx_sdcard

5.then insert sdcard ,and power on. it stop after "booting the kernel"

PowerPrep start initialize power...

Battery Voltage = 4.20V

boot from battery. 5v input not detected

Dec 20 201220:33:03

FRAC 0x92925A52

Wait for ddr ready 1power 0x00820616

Frac 0x92925A52

start change cpu freq

hbus 0x00000003

cpu 0x00010001

start test memory accress

ddr2 0x40000000

finish simple test

Uncompressing kernel................................................................done,booting the kernel

Re: mx280:use application uart as a console

JackyAtFreescal — Wed, 09 Jan 2013 00:46:51 GMT

The next thing being printed from console should be "Linux version 2.6.35...", did you see it from the debug uart (instead of application uart)?

yangsong — Wed, 09 Jan 2013 14:09:18 GMT

thanks for your reply.this problem had been resolved.

app uart 0 was not initialized before used as a console.