Skip to content

High speed UART configuration not working? #105

Closed
@Stonie

Description

@Stonie

Hello,

I am trying to use configuration options in config.txt to enable high speed UART.
(as listed here: http://elinux.org/RPi_config.txt)

My /boot/config.txt

init_uart_baud=1000000
init_uart_clock=16000000

With these settings I am hoping to achieve 1Mbps Uart? but I cant seem to get this working?

Note I have disabled the serial console in boot.txt and /etc/inittab

Testing with stty, yields the following (is there a better way?)

root@raspberrypi:~# stty -F /dev/ttyAMA0 115200
root@raspberrypi:~# stty -F /dev/ttyAMA0 1000000
stty: /dev/ttyAMA0: unable to perform all requested operations

Am I missing something? Do I need to recompile the kernel?

System spec:

Base image is the current Raspbian (2012-08-16-wheezy-raspbian)

# uname -a
Linux raspberrypi 3.2.27+ #102 PREEMPT Sat Sep 1 01:00:50 BST 2012 armv6l GNU/Linux

root@raspberrypi:~# /opt/vc/bin/vcgencmd version
Aug 25 2012 01:12:00 
Copyright (c) 2012 Broadcom
version 333349 (release)

System fully upgraded today using apt-get update and dist-upgrade.

Thanks in advance.
Stonie.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions