Difference between revisions of "Linux Debug"
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** Tips to do debug under linux ** | ** Tips to do debug under linux ** | ||
| − | + | ==Introduction== | |
On this page, you will find usefull informations for debugging Armadeus under Linux | On this page, you will find usefull informations for debugging Armadeus under Linux | ||
| − | + | ==Testing your custom Linux kernel before flashing it== | |
You can test a linux kernel you've generated without having to reflash your board and destroy your currently working image. | You can test a linux kernel you've generated without having to reflash your board and destroy your currently working image. | ||
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BIOS> bootm 8000000 | BIOS> bootm 8000000 | ||
| − | |||
| − | This tool allows you to access | + | ==Changing processor registers from Linux user space with imxregs== |
| − | directly from Linux console. | + | |
| + | This tool allows you to access i.MXl registers from linux userspace/console. This way you debug your driver or access i.MXl hardware functionnalities directly from Linux console. | ||
First, you have enable this tool in Buildroot (package selection for target): | First, you have enable this tool in Buildroot (package selection for target): | ||
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# imxregs (to dump all supported registers) | # imxregs (to dump all supported registers) | ||
| − | + | ===Examples:=== | |
Show OCR1 registers of each GPIO Port: | Show OCR1 registers of each GPIO Port: | ||
# imxregs OCR1 | # imxregs OCR1 | ||
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# imxregs OCR1_D 123 | # imxregs OCR1_D 123 | ||
| − | == | + | |
| + | ==Changing FPGA IP's registers from Linux user space with 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. | 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. | ||
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# fpgaregs address (for read) or fpga address value (for write) | # fpgaregs address (for read) or fpga address value (for write) | ||
| − | + | ===Examples:=== | |
Show register at internal FPGA address 0x0010: | Show register at internal FPGA address 0x0010: | ||
# fpgaregs 0x0010 | # fpgaregs 0x0010 | ||
Write 0x0123 to FPGA register 0x0020: | Write 0x0123 to FPGA register 0x0020: | ||
| − | # | + | # fpgaregs 0x0020 0x0123 |
| − | + | ==Links== | |
http://www.armadeus.com | http://www.armadeus.com | ||
Revision as of 00:44, 4 January 2007
- Tips to do debug under linux **
Contents
Introduction
On this page, you will find usefull informations for debugging Armadeus under Linux
Testing your custom Linux kernel before flashing it
You can test a linux kernel you've generated without having to reflash your board and destroy your currently working image. Indeed Linux kernel images can be loaded and started from SDRAM with U-Boot:
BIOS> tftp 8000000 linux-kernel-2.6.16-arm.bin BIOS> bootm 8000000
Changing processor registers from Linux user space with imxregs
This tool allows you to access i.MXl registers from linux userspace/console. This way you debug your driver or access i.MXl 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
Changing FPGA IP's registers from Linux user space with 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:
# fpgaregs 0x0020 0x0123
