https://github.com/klauer/can485_canopen_slave
AST-CAN485 Development Board / CANopen slave / canfestival-3-asc example
https://github.com/klauer/can485_canopen_slave
Last synced: 3 months ago
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AST-CAN485 Development Board / CANopen slave / canfestival-3-asc example
- Host: GitHub
- URL: https://github.com/klauer/can485_canopen_slave
- Owner: klauer
- Created: 2019-02-06T00:59:21.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2019-02-06T20:28:57.000Z (over 6 years ago)
- Last Synced: 2025-01-17T16:52:16.634Z (5 months ago)
- Language: Python
- Size: 2.08 MB
- Stars: 1
- Watchers: 2
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
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README
AST-CAN485 CANopen Slave Example
--------------------------------
A simple CANopen slave example using the SparkFun AST-CAN485 board.
Connections
-----------
4 digital inputs and 8 digital outputs are exposed through PDOs as follows:
| AST-CAN485 | Port / bit | Usage | CANopen |
|:-------------:|:-------------:|:--------------:|:---------------:|
| A0 | PF0 | Input / TxPDO | 0x6000:01 bit 0 |
| A1 | PF1 | Input / TxPDO | 0x6000:01 bit 1 |
| A2 | PF2 | Input / TxPDO | 0x6000:01 bit 2 |
| A3 | PF3 | Input / TxPDO | 0x6000:01 bit 3 |
| RXI | PE0 | Output / RxPDO | 0x7000:01 bit 0 |
| TXO | PE1 | Output / RxPDO | 0x7000:01 bit 1 |
| D4 | PE2 | Output / RxPDO | 0x7000:01 bit 2 |
| D5 | PE3 | Output / RxPDO | 0x7000:01 bit 3 |
| D6 | PE4 | Output / RxPDO | 0x7000:01 bit 4 |
| D7 | PE5 | Output / RxPDO | 0x7000:01 bit 5 |
| D8 | PE6 | Output / RxPDO | 0x7000:01 bit 6 |
| D9 | PE7 | Output / RxPDO | 0x7000:01 bit 7 |
Standard output (stdout) and standard error (stderr) can be used directly with
the Arduino FTDI serial port monitor at 9600 baud.
A 120 ohm resistor should be connected between CANL and CANH, as noted in the
hookup guide. For connecting to a Beckhoff EL6751 / Dsub9 CANopen master:
| AST-CAN485 | EL6751 DB9 |
|:-------------:|:-------------:|
| CANLO | Pin 2 |
| CANHI | Pin 7 |
| GND | Pin 3 / Pin 6 |
Object Dictionary
-----------------
The CANopen object dictionary is provided as both `.od` and `.eds` (what
Beckhoff TwinCAT3 expects).
Building
--------
The provided `Makefile` and Atmel Studio 7 project should work directly.
Uploading
---------
A couple tweaks to the Makefile:
1. Change the `ARDUINO_ROOT` path to point to where you have it installed
2. Change the `COM_PORT` to the appropriate device
Will also allow you to upload using `avrdude` like so:
```bash
$ make all upload
```
CANopen library
---------------
This repository, in the interests of making a focused and easily compilable
example for the AST-CAN485, includes a vendored copy of `canfestival-3-asc`.
It currently corresponds with the changeset `968:1a25f5151a8d` (2018/5/11) from
its bitbucket hg repository.
Python
------
Located in `canfestival/objdictgen`:
The object dictionary editor program, based on wxPython, still runs on Python 2.7.
It requires wxPython 3, which is not available via pip.
To get this working with conda:
```bash
$ conda create -n canfestival python=2.7 wxpython==3
$ cd canfestival/objdictgen
$ source activate canfestival
$ pythonw objdictedit.py ../../ObjDict.od
```
Links
-----
* [canfestival-3-asc repository](https://bitbucket.org/Mongo/canfestival-3-asc)
* [AST-CAN485 product page](https://www.sparkfun.com/products/14483)
* [AST-CAN485 schematic](https://cdn.sparkfun.com/assets/2/8/3/4/7/SparkFun_AST-CAN485.pdf)
* [AST-CAN485 hookup guide](https://learn.sparkfun.com/tutorials/ast-can485-hookup-guide/)