Difference between revisions of "Linux Debug"

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(imxregs)
Line 41: Line 41:
 
  # imxregs OCR1_D 123
 
  # imxregs OCR1_D 123
  
===TBDL===
+
===fpgaregs===
 +
 
 +
This tool allows you to access FPGA registers from linux userspace/console. This way you can easily debug your driver directly from the Linux console.
 +
 
 +
First, you have enable this tool in Buildroot (package selection for target):
 +
$ make menuconfig
 +
 
 +
Once done, compile it:
 +
$ make
 +
 
 +
The generated file is located in buildroot/build_arm_nofpu/fpgaregs-1.0/. Now you can copy it on your target.
 +
Then in linux, launch it like that:
 +
# fpgaregs address (for read) or fpga address value (for write)
 +
 
 +
====Examples:====
 +
Show register at internal FPGA address 0x0010:
 +
# fpgaregs 0x0010
 +
 
 +
Write 0x0123 to FPGA register 0x0020:
 +
# imxregs 0x0020 0x0123
 +
 
  
 
===Links===
 
===Links===
 
http://www.armadeus.com
 
http://www.armadeus.com

Revision as of 21:18, 15 December 2006

    • Tips to do debug under linux **

Introduction

On this page, you will find usefull informations for debugging Armadeus under Linux

Testing Linux kernel

You can test a linux kernel you've generated without to have to reflash your board and destroy your currently working image. Indeed Linux kernel images can be loaded and started from RAM:

BIOS> tftpboot 0x08800000 linux-kernel-2.6.16-arm.bin
BIOS> bootm 0x08800000

imxregs

This tool allows you to access iMX registers from linux userspace/console. This way you debug your driver or access iMX hardware functionnalities directly from Linux console.

First, you have enable this tool in Buildroot (package selection for target):

$ make menuconfig

Once done, compile it:

$ make

The generated file is located in buildroot/build_arm_nofpu/imxregs-1.0/. Now you can copy it on your target.

To use it, you must clear PAR 1&2 registers (register access rights) before launching Linux kernel, so in U-Boot type:

BIOS> mw.l 0x00200008 0
BIOS> mw.l 0x00210008 0

Then in linux, launch it like that:

# imxregs REGISTER_NAME  (give it the register name as printed in iMX Ref Manual or just the begining of the name)

or

# imxregs    (to dump all supported registers)

Examples:

Show OCR1 registers of each GPIO Port:

# imxregs OCR1

Write 123 to OCR1_D register:

# imxregs OCR1_D 123

fpgaregs

This tool allows you to access FPGA registers from linux userspace/console. This way you can easily debug your driver directly from the Linux console.

First, you have enable this tool in Buildroot (package selection for target):

$ make menuconfig

Once done, compile it:

$ make

The generated file is located in buildroot/build_arm_nofpu/fpgaregs-1.0/. Now you can copy it on your target. Then in linux, launch it like that:

# fpgaregs address (for read) or fpga address value (for write)

Examples:

Show register at internal FPGA address 0x0010:

# fpgaregs 0x0010

Write 0x0123 to FPGA register 0x0020:

# imxregs 0x0020 0x0123


Links

http://www.armadeus.com