Kari Argillander
369da70f2a
* format: Strip trailing whitespaces
We want to get rid of trailing whitespaces completly as they make just git
noice. Much better to start using automated tools to get rid of them once and
not getting them back again. This way git history will be cleaner and review
easier.
Commit was generated with:
pre-commit run --all-files trailing-whitespace
* format: Files should have exactly one new line end of them
It is good practice that every file has one new line. It is not now days so
mandatory but it also is not nice if file has lot of newlines end of it. We will
use pre-commit which takes automatically care about this so let's fix all.
Commit was generated with:
pre-commit run --all-files end-of-file-fixer
* format: Convert tabs to spaces
Project mostly use spaces over tabs. When mixing tabs and spaces this usually
makes formatting issues and also when changing those in commits it will make lot
of git noise. We will force spaces most of the time and use pre-commit to fix.
Commit was generated with:
pre-commit run --all-files remove-tabs
---------
Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
This port was done with a AT91SAM7S-EK which contained a
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AT91SAM7S64 processor. The compiler was the GNU ARM compiler
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and tools from Yagarto project.
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The hardware was modified by severing the I-PA5 (RXD0),
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I-PA6 (TXD0), I-PA7 (RTS0) pads and rerouting those
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signals to a DS75176 RS-485 transceiver.
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PIN SIGNAL AT91SAM7S
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--- ------ ---------
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1 RO RXD0
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2 /RE RTS
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3 DE RTS
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4 DI TXD0
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5 GND GND
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6 DO n/c
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7 DO n/c
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8 +5V From EXT_VCC via 5V Regulator
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The makefile allows you to build just the dlmstp or a simple
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server, both for programming into the flash memory of the processor.
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The dlmstp is the datalink layer for MS/TP over RS-485.
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I used the makefile from the command line on Windows, and
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then used the SAM-BA to send the resulting .bin file to the
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board using a J-Link. To debug the code from flash, run the
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J-Link GDB Server and then:
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> arm-elf-gdb bacnet.elf
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I got the crt.s, at91sam7s256.ld, blinker.c, init.c, isr.c, and
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timer.c from James P Lynch. I created the rs485.c based on the
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initialization sequence from serial.c by Keil Electronik. I
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got the at91sam7s256.h file from Atmel via the Keil website.
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I started with the makefile from James P Lynch, but it didn't work
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for me. I then used some ideas from FreeRTOS makefile, and
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created my own makefile from scratch.
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Hopefully you find it useful!
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Steve Karg
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