NAME¶

lpcprog - NXP's LPC micro-controllers flasher

SYNOPSIS¶

lpcprog -d serial_device -c command [OPTIONS] ... [FILE]

DESCRIPTION¶

Use ISP protocol to flash LPC micro-controllers over serial line.

For all commands the target micro-controller must be in ISP mode and waiting for synchronisation ISP command (default state when entering ISP mode). See ISP MODE AND CODE READ PROTECTION section for more details.

A FILE argument must be given for dump and flash commands. For flash command this file is the data (program) to be written to LPC internal Flash memory. For dump command, it will store the actual content of the LPC internal flash memory.

Mandatory arguments to long options are mandatory for short options too.

-p, --parts==PARTS

Use PARTS as parts desription file instead of the default ones. See PARTS DESCRIPTION FILES section for more information on default parts desription files and order of precedence.

-d, --device=DEV

Use DEV as host serial line to program the target. Full path must be provided. Device node files are usually located in /dev/ directory.

-c, --command=COMMAND

Command to execute. COMMAND must be one of id, dump, flash, blank or go. See COMMANDS section for commands description.

-b, --baudrate=BAUD

Use BAUD as the baudrate for communication with the target device. Defaults to 115200.

-t, --trace

Turn on trace output of serial communication with target device

-f, --freq=FREQ

Use FREQ (KHz) as the oscilator frequency of target device. Defaults to 10000 KHz

-n, --no-user-code

Do not compute a valid user code for exception vector 7. See USER CODE section.

-h, --help

Display help information and exit

-v, --version

Display version information and exit

COMMANDS¶

The command must be one of id, dump, flash, blank or go.

id

The id command displays the LPC part identification ID, the uid (unique ID), and the bootloader version of the connected target device.

dump

Dump the whole connected target's flash memory content to the given file. This command requires a file argument.

flash

Flash the content of the file given as argument to the beginning of the connected target's flash memory. Automatic computation of the User Code is made and User Code is stored in the 7th exception vector. Use -n option to prevent User Code modification. If you need to write your file to a different flash section, use the lpcisp tool.

blank

Erase the whole flash.

go

Unsupported Yet. Reset the target using hardware reset button or power cycle the device to start the program.

PARTS DESCRIPTION FILES¶

Default parts description files are /etc/lpctools_parts.def or ./lpctools_parts.def The parts description file is parsed for LPC device description for dump, blank, and flash commands. If none of the defaults exist and no existing file is supplied using -p option, these command cannot execute. If the part description is not found in the first found file, the command will not execute either. If no -p option is provided, the program looks for lpctools_parts.def in the current directory first, and then in the /etc/ directory.

The content of parts description files is a list of LPC parts description. Each line holds one part description. Lines starting by # are comments. Refer to the default file found in the /etc/ directory for more information on the line format.

USER CODE¶

A valid User Code is requiered by the LPC bootloader to start the internal user program. User Code is considered valid if the reserved exception vector location 7 (offset 0x 0000 001C in the vector table) contains the 2’s complement of the check-sum of table entries 0 through 6. This causes the checksum of the first 8 table entries to be 0.

If the signature is not valid the LPC enters ISP mode.

The default behavior of lpcprog is to compute a valid code for the 7th exception vector and modify the programed binary data to include this valid code. You can prevent this by using -n option.

ISP MODE AND CODE READ PROTECTION¶

Code Read Protection is a mechanism that allows "the user" to enable different levels of "security" in the system so that access to the on-chip flash and use of the ISP can be restricted. When needed, CRP is invoked by programing a specific pattern in flash location at 0x0000 02FC. IAP commands are not affected by the code read protection.

If your device Does not enter ISP state, or if some commands do not succeed, it may be because the CRP mechanism is in use on your device.

Code Read Protection will not be implemented as it goes against the license of this tool and against the free software philosophy.

AUTHOR¶

Written by Nathael Pajani.

REPORTING BUGS¶

Report bugs to bug@techno-innov.fr
Techno-Innov home page: <http://www.techno-innov.fr/>
Software Git Repository: <http://git.techno-innov.fr/>

COPYRIGHT¶

Copyright © 2013 Techno-Innov License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO¶

lpcisp(1)