CAN bus demo MCP25020 - Revision history

FabienM: /* Usage */

2011-07-07T12:51:51Z

‎Usage

KevinJ: /* Links */

2011-05-19T22:25:59Z

‎Links

KevinJ: /* Links */

2011-05-19T22:25:26Z

‎Links

KevinJ at 17:37, 4 May 2011

2011-05-04T17:37:03Z

KevinJ: /* Driver installation */

2011-04-26T09:00:47Z

‎Driver installation

KevinJ: /* Driver installation */

2011-04-26T09:00:11Z

‎Driver installation

KevinJ at 08:59, 26 April 2011

2011-04-26T08:59:08Z

KevinJ at 15:03, 18 April 2011

2011-04-18T15:03:18Z

KevinJ: New page: This page is related with the DEMOS_MCP25020 package. This software show how to communicate easily on a CAN bus, particularly with the Microchip MCP25020 I/O Expander. This ship is used on...

2011-04-18T14:40:51Z

New page: This page is related with the DEMOS_MCP25020 package. This software show how to communicate easily on a CAN bus, particularly with the Microchip MCP25020 I/O Expander. This ship is used on...

New page

This page is related with the DEMOS_MCP25020 package. This software show how to communicate easily on a CAN bus, particularly with the Microchip MCP25020 I/O Expander. This ship is used on the Microchip kit MCP2515DM-PCTL:
http://fr.farnell.com/microchip/mcp2515dm-pctl/kit-d-eval-mcp2515-controleur-can/dp/1332096

{{Warning| Please ensure that you use the trunk version of armadeus (kernel linux-2.6.38.1 is required) before trying the instructions described on this page!}}

==Driver installation==
<pre class="host">
$ make linux26-menuconfig
</pre>

<pre class="config">
Networking support --->
<M> CAN bus subsystem support --->
--- CAN bus subsystem support
<M> Raw CAN Protocol (raw access with CAN-ID filtering)
<M> Broadcast Manager CAN Protocol (with content filtering)
CAN Device Drivers --->
<M> Virtual Local CAN Interface (vcan)
<M> Platform CAN drivers with Netlink support
[*] CAN bit-timing calculation
<M> Microchip 251x series SPI CAN Controller
</pre>

<pre class="host">
$ make-linux26
</pre>
* Reflash kernel

==Software installation==
<pre class="host">
$ make menuconfig
</pre>

<pre class="config">
Package Selection for the target --->
Armadeus specific tools/utilities --->
[*] Armadeus misc demos
Choose the demos to install --->
[*] DEMOS_MCP25020
</pre>

<pre class="host">
$ make
</pre>
* Reflash rootfs

==Mounting==
First and foremost, you have to create the bus with the two nodes.
* Add the APF27 as the first node:
** The pin to connect your APF27-Dev to the CAN bus is on the J13 connector.

[[Image:APF27DEV-J13-localisation.png]]
[[Image:APF27DEV-J13-PINOUT.png‎]]
{| border="1" cellpadding="5" cellspacing="0" summary="J13 Pinout"
|- style="background:#efefef;"
! ''' J13 - Pins ''' || ''' Functionnalities '''
|----------------
| 1 || +3V3
|----------------
| 2 || CAN H
|----------------
| 3 || CAN L
|----------------
| 4 || GND
|----------------
|}

Check that the J11 is closed on your APF27-Dev board, it will add the end line 120ohm resistor of the CAN bus.

* Add the Microchip kit MCP2515DM-PCTL ( Expander side ) to the CAN bus:
[[Image:MCP2515DM-PCTL-J3-localisation.png]]
[[Image:MCP2515DM-PCTL-J3-PINOUT.png‎]]
{| border="1" cellpadding="5" cellspacing="0" summary="J13 Pinout"
|- style="background:#efefef;"
! ''' J3 - Pins ''' || ''' Functionnalities '''
|----------------
| 1 || nc
|----------------
| 2 || GND
|----------------
| 3 || CAN L
|----------------
| 4 || CAN H
|----------------
| 5 || GND
|----------------
| 6 || nc
|----------------
| 7 || nc
|----------------
| 8 || +5V
|----------------
| 9 || nc
|----------------
| 10 || nc
|----------------
|}

Check that the JP3 is closed on the Microchip demo board, it will add the end line 120ohm resistor of the CAN bus.

* Connect CAN L, CAN H and GND to the correct pins of the APF27 board

==Usage==
Once your pins are correctly connected, launch your APF27-Dev Board.
With the demonstration program, you can:
* Listen on the bus
<pre class="apf">
# mcp25020_ctrl listen
</pre>
* Flash the D6 Led on the Microchip demo board
<pre class="apf">
# mcp25020_ctrl led-flash [interval]
</pre>
Interval is 10 to 10000 (The flashing interval in ms)
* Turn ON or OFF the D6 Led on the Microchip demo board
<pre class="apf">
# mcp25020_ctrl led-state [ON|OFF]
</pre>
Select ON or OFF to changing the led state.
* Get the state of the SW2 switch on the Microchip demo board (released or pushed)
<pre class="apf">
# mcp25020_ctrl sw2-get
</pre>
* Get the status of MCP25020 configuration registers
<pre class="apf">
# mcp25020_ctrl config
</pre>
See the MCP25020 datasheet for more informations

==Source code==
The program source of the demo is viewable in your ARMadeus repository target/demos/mcp25020_ctrl/mcp25020_ctrl.c

==Examples program==
To create a program with CAN protocol in C/C++, Python, ... is similar to programming a TCP/IP protocol application. Both implement the UNIX socket. You can found some examples in the directory "test" of the socketcan sources, you can found them on:
* http://svn.berlios.de/wsvn/socketcan (trunk->test)

==Links==
* https://www.ridgerun.com/developer/wiki/index.php/How_to_configure_and_use_CAN_bus (How to configure and use CAN bus)
* http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en024094 (MCP2515 CAN PICtail Demo Board)
* http://ww1.microchip.com/downloads/en/DeviceDoc/21664D.pdf (MCP25020 datasheet)
* http://www.kvaser.com/can/protocol/index.htm (CAN introduction)

[[Category:Linux drivers]]
[[Category:CAN bus]]

@@ Line 7: / Line 7: @@
 Please refer to this page (under the '''Driver installation''' section): http://www.armadeus.com/wiki/index.php?title=CAN_bus_Linux_driver#Driver_installation
-Then, try the '''Usage''' and '''Quick test''' sections to check if the CAN network is working correctly.
+Then, try the instructions in the '''Usage''' and '''Quick test''' sections to check if the CAN network is working correctly.
 ==Software installation==

@@ Line 100: / Line 100: @@
 * Listen on the bus
 <pre class="apf">
-  # mcp25020_ctrl listen
+  # mcp25020_ctrl can0 listen
 </pre>
 * Blink the D6 Led on the Microchip demo board
 <pre class="apf">
-  # mcp25020_ctrl led-blink [interval]
+  # mcp25020_ctrl can0 led-blink [interval]
 </pre>
 Interval is 10 to 10000 (The blinking interval in ms)
 * Turn ON or OFF the D6 Led on the Microchip demo board
 <pre class="apf">
-  # mcp25020_ctrl led-state [ON|OFF]
+  # mcp25020_ctrl can0 led-state [ON|OFF]
 </pre>
 Select ON or OFF to changing the led state.
 * Get the state of the SW2 switch on the Microchip demo board (released or pushed)
 <pre class="apf">
-  # mcp25020_ctrl sw2-get
+  # mcp25020_ctrl can0 sw2-get
 </pre>
 * Get the status of MCP25020 configuration registers
 <pre class="apf">
-  # mcp25020_ctrl config
+  # mcp25020_ctrl can0 config
 </pre>
 See the MCP25020 datasheet for more informations

@@ Line 134: / Line 134: @@
 * http://ww1.microchip.com/downloads/en/DeviceDoc/21664D.pdf (MCP25020 datasheet)
 * http://www.kvaser.com/can/protocol/index.htm (CAN introduction)
-* http://www.armadeus.com/wiki/index.php?title=User:KevinJ (Communication with a car CAN bus)
+* http://www.armadeus.com/wiki/index.php?title=User:KevinJ#Communication_with_the_CAN_Bus_of_a_car (Communication with a car CAN bus)
 [[Category:Linux drivers]]
 [[Category:CAN bus]]

@@ Line 27: / Line 27: @@
 * Reflash rootfs
-==Mounting==
+==Assembly==
 First and foremost, you have to create the bus with the two nodes.
 * Add the APF27 as the first node:

@@ Line 1: / Line 1: @@
-This page is related with the DEMOS_MCP25020 package. This software show how to communicate easily on a CAN bus, particularly with the Microchip MCP25020 I/O Expander. This ship is used on the Microchip kit MCP2515DM-PCTL:
+This page is related with the DEMOS_MCP25020 package. This software show how to communicate easily on a CAN bus, particularly with the Microchip MCP25020 I/O Expander. This chip is used on the Microchip kit MCP2515DM-PCTL:
 http://fr.farnell.com/microchip/mcp2515dm-pctl/kit-d-eval-mcp2515-controleur-can/dp/1332096
@@ Line 5: / Line 5: @@
 ==Driver installation==
-<pre class="host">
+Please refer to this page (under the '''Driver installation''' section): http://www.armadeus.com/wiki/index.php?title=CAN_bus_Linux_driver#Driver_installation
- $ make linux26-menuconfig
-</pre>
-−
-<pre class="config">
-Networking support  --->
-    <M>   CAN bus subsystem support --->
-        --- CAN bus subsystem support
-        <M>   Raw CAN Protocol (raw access with CAN-ID filtering)
-        <M>   Broadcast Manager CAN Protocol (with content filtering)
-              CAN Device Drivers  --->
-                  <M> Virtual Local CAN Interface (vcan)
-                  <M> Platform CAN drivers with Netlink support
-                  [*]   CAN bit-timing calculation
-                  <M> Microchip 251x series SPI CAN Controller
-</pre>
-−
-<pre class="host">
- $ make-linux26
-</pre>
-* Reflash kernel
 ==Software installation==
@@ Line 71: / Line 51: @@
 [[Image:MCP2515DM-PCTL-J3-localisation.png]]
 [[Image:MCP2515DM-PCTL-J3-PINOUT.png‎]]
-{| border="1" cellpadding="5" cellspacing="0" summary="J13 Pinout"
+{| border="1" cellpadding="5" cellspacing="0" summary="J3 Pinout"
 |- style="background:#efefef;"
 ! ''' J3 - Pins ''' || ''' Functionnalities '''
@@ Line 99: / Line 79: @@
 Check that the JP3 is closed on the Microchip demo board, it will add the end line 120ohm resistor of the CAN bus.
-* Connect CAN L, CAN H and GND to the correct pins of the APF27 board
+* Connect CAN L, CAN H and GND between your APF27-Dev and the MCP2515DM-PCTL
 ==Usage==
@@ Line 108: / Line 100: @@
   # mcp25020_ctrl listen
 </pre>
-* Flash the D6 Led on the Microchip demo board
+* Blink the D6 Led on the Microchip demo board
 <pre class="apf">
-  # mcp25020_ctrl led-flash [interval]
+  # mcp25020_ctrl led-blink [interval]
 </pre>
-Interval is 10 to 10000 (The flashing interval in ms)
+Interval is 10 to 10000 (The blinking interval in ms)
 * Turn ON or OFF the D6 Led on the Microchip demo board
 <pre class="apf">