Difference between revisions of "Recans A0"

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Recans A0 has two controllers, one is based on RP2040, the other on MCP2515.  
 
Recans A0 has two controllers, one is based on RP2040, the other on MCP2515.  
  
−
To bring up the RP2040 CAN controller:
+
The MCP2515 CAN controller<br>
 +
 
 
<pre>
 
<pre>
−
sudo ip link set can0 type can bitrate 1000000
+
sudo mount -o remount,rw /boot
 +
sudo armbian-add-overlay /boot/overlay-user/sun50i-a64-mcp251x.dts
 +
sudo mount -o remount,ro /boot
 +
</pre>
 +
 
 +
After booting:
 +
<pre>
 +
sudo gpioset 1 165=0
 +
sudo modprobe -r mcp251x
 +
sudo modprobe mcp251x
 +
dmesg | grep mcp
 +
</pre>
 +
 
 +
<pre>
 +
sudo ip link set can0 type can bitrate 125000
 +
sudo ip link set can0 txqueuelen 128
 
sudo ip link set up can0
 
sudo ip link set up can0
 
</pre>
 
</pre>
  
−
The MCP2515 CAN controller<br>
+
Interrupt: STEP7 = PL11
 +
 
 +
<pre>
 +
sudo apt install net-tools can-utils
 +
</pre>
 +
 
 +
<pre>
 +
cansend can1 5A1#11.2233.44556677.88
 +
</pre>
 +
 
 +
<pre>
 +
ip -details link show can0
 +
</pre>
 +
 
 +
<pre>
 +
~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0
 +
</pre>
 +
 
 +
<pre>
 +
candump -tz -Ddex can0,#FFFFFFFF
 +
</pre>
 +
 
 +
To compile the RP2040 with klipper:
 +
<pre>
 +
cd ~/klipper
 +
cp test/configs/rp2040.config .config
 +
make menuconfig
 +
-- Communication interface = RP2040
 +
-- RX = GPIO4
 +
-- TX = GPIO5
 +
make
 +
sudo apt install libusb-1.0-0-dev
 +
sudo FLASH_DEVICE="2e8a:0003" make flash
 +
 
 +
</pre>
 +
 
 +
 
 +
 
 +
===Hardware Errata===
 +
* SPI_CLK and SPI_MOSI are interchanged and need to be fixed.
 +
* /RESET is floating.
 +
 
 +
===Error messages===
 +
When sending:
 +
- write: No buffer space available
 +
 
 +
Got error -1 in can write: (105)No buffer space available
 +
 
 +
After that I get:
 +
                                         
 +
DROPCOUNT: dropped 109 CAN frames on 'can0' socket (total drops 576)
 +
 
 +
(302.908159)  can0  RX - -  20000004  [8]  00 01 00 00 00 00 00 00  ERRORFRAME                 
 +
        controller-problem{rx-overflow} 
 +
 
 +
And the INT pin remains low. Needs a restart.
 +
 
 +
===Debug===
  
 +
During init/reset:
 
<pre>
 
<pre>
−
sudo mount -o remount,rw /boot
+
TX: 0xC0 = RESET
−
sudo armbian-add-overlay /boot/overlay-user/sun50i-a64-spi1.dts
+
 
−
sudo mount -o remount,ro /boot
+
TX: 0x03 0x0E 0x00 = READ CANSTAT
 +
RX: 0x00 0x00 0x80 = Device is in Configuration mode
 +
 
 +
TX: 0x03 0x0F 0x00 = READ CANCTRL
 +
RX: ?
 +
 
 +
TX: 0x02 0x0F 0x20 = WRITE CANCTL = Sleep Mode
 
</pre>
 
</pre>
  
 +
 +
When trying to set interface up:
 
<pre>
 
<pre>
−
ls -al /dev/spidev1.0
+
TX: 0x02 0x0F 0x80 = WRITE CANCTRL REQOP2 = Configuration Mode
 +
RX: 0x00 0x00 0x00
 
</pre>
 
</pre>
  
−
Interrupt: STEP7 = PL11
+
<pre>
 +
TX: 0x03 0x0E 0x00 = READ CANSTAT
 +
RX: 0x00 0x00 0x64 = OPMOD[2:0] = 0b011, ICOD[2:0] = 0b010
 +
</pre>
  
 +
Device is in Listen-Only mode, Wake-up interrupt
  
  
−
Errata:
+
It seems that the bring up sequence interferes with the initialization. Must make sure the mcp2515 probing is done after power is applied.
−
- SPI_CLK and SPI_MOSI are interchanged and need to be fixed.  
 
−
- /RESET is floating.
 

Latest revision as of 00:28, 25 February 2024

Recans A0 has two controllers, one is based on RP2040, the other on MCP2515.

The MCP2515 CAN controller

sudo mount -o remount,rw /boot
sudo armbian-add-overlay /boot/overlay-user/sun50i-a64-mcp251x.dts
sudo mount -o remount,ro /boot

After booting: 

sudo gpioset 1 165=0
sudo modprobe -r mcp251x
sudo modprobe mcp251x
dmesg | grep mcp

sudo ip link set can0 type can bitrate 125000
sudo ip link set can0 txqueuelen 128
sudo ip link set up can0

Interrupt: STEP7 = PL11 

sudo apt install net-tools can-utils

cansend can1 5A1#11.2233.44556677.88

ip -details link show can0

~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0

candump -tz -Ddex can0,#FFFFFFFF

To compile the RP2040 with klipper: 

cd ~/klipper
cp test/configs/rp2040.config .config
make menuconfig
-- Communication interface = RP2040
-- RX = GPIO4
-- TX = GPIO5
make
sudo apt install libusb-1.0-0-dev
sudo FLASH_DEVICE="2e8a:0003" make flash


Hardware Errata

  • SPI_CLK and SPI_MOSI are interchanged and need to be fixed.
  • /RESET is floating.

Error messages

When sending: - write: No buffer space available

Got error -1 in can write: (105)No buffer space available

After that I get:

DROPCOUNT: dropped 109 CAN frames on 'can0' socket (total drops 576)

(302.908159) can0 RX - - 20000004 [8] 00 01 00 00 00 00 00 00 ERRORFRAME 

       controller-problem{rx-overflow}

And the INT pin remains low. Needs a restart.

Debug

During init/reset: 

TX: 0xC0 = RESET

TX: 0x03 0x0E 0x00 = READ CANSTAT
RX: 0x00 0x00 0x80 = Device is in Configuration mode

TX: 0x03 0x0F 0x00 = READ CANCTRL
RX: ? 

TX: 0x02 0x0F 0x20 = WRITE CANCTL = Sleep Mode


When trying to set interface up: 

TX: 0x02 0x0F 0x80 = WRITE CANCTRL REQOP2 = Configuration Mode
RX: 0x00 0x00 0x00 

TX: 0x03 0x0E 0x00 = READ CANSTAT
RX: 0x00 0x00 0x64 = OPMOD[2:0] = 0b011, ICOD[2:0] = 0b010

Device is in Listen-Only mode, Wake-up interrupt


It seems that the bring up sequence interferes with the initialization. Must make sure the mcp2515 probing is done after power is applied.

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