Files
bacnet_stack/ports/at91sam7s
Kari Argillander cb243c36a8 Improve SPDX identifier coverage (#716)
* Change MIT license texts to SPDX-License-Identifier

SPDX-License-Identifier is much easier to understand and grep than
license text so use that instead.

* Change GPL exception license texts to SPDX-License-Identifier

SPDX-License-Identifier is much easier to understand and grep than
license text so use that instead.

* Change misc license texts to SPDX-License-Identifier

There are some external code in repo which are not licenses as most of
the stuff in this repo. We still want every file to have SPDX identifier
to easily grep licenses.

* Add currently used license files

Even though Bacnet-Stack is using SPDX identifiers we still need to give
those license files with source. For this reason add all license files
to license/ folder.

SPDX has also files which would make same thing but this is style which
example Linux kernel is using and it is quite clear so I choose that one
for now.

I choosed not yet bring CC-PDDC as that is not right license for those
files.

---------

Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>
2024-08-12 15:33:02 -05:00
..
2024-08-12 15:33:02 -05:00
2019-10-08 23:47:53 -05:00
2024-08-12 15:33:02 -05:00
2019-10-08 23:47:53 -05:00
2024-08-12 15:33:02 -05:00
2019-10-08 23:47:53 -05:00
2024-08-12 15:33:02 -05:00
2020-04-30 10:13:11 -05:00
2024-08-12 15:33:02 -05:00
2024-08-12 15:33:02 -05:00
2019-10-08 23:47:53 -05:00

This port was done with a AT91SAM7S-EK which contained a
AT91SAM7S64 processor.  The compiler was the GNU ARM compiler
and tools from Yagarto project.  

The hardware was modified by severing the I-PA5 (RXD0), 
I-PA6 (TXD0), I-PA7 (RTS0) pads and rerouting those 
signals to a DS75176 RS-485 transceiver. 
PIN SIGNAL AT91SAM7S
--- ------ ---------
 1   RO      RXD0
 2   /RE     RTS
 3   DE      RTS
 4   DI      TXD0
 5   GND     GND
 6   DO      n/c
 7   DO      n/c
 8   +5V     From EXT_VCC via 5V Regulator

The makefile allows you to build just the dlmstp or a simple
server, both for programming into the flash memory of the processor.
The dlmstp is the datalink layer for MS/TP over RS-485.

I used the makefile from the command line on Windows, and 
then used the SAM-BA to send the resulting .bin file to the 
board using a J-Link.  To debug the code from flash, run the 
J-Link GDB Server and then:
> arm-elf-gdb bacnet.elf

I got the crt.s, at91sam7s256.ld, blinker.c, init.c, isr.c, and
timer.c from James P Lynch.  I created the rs485.c based on the 
initialization sequence from serial.c by Keil Electronik.  I 
got the at91sam7s256.h file from Atmel via the Keil website.
I started with the makefile from James P Lynch, but it didn't work
for me.  I then used some ideas from FreeRTOS makefile, and 
created my own makefile from scratch.

Hopefully you find it useful!

Steve Karg