HELP: Need to configure MCP2515 using Raspberry pi's SPI 0 bus.
I am using Raspberry pi 3b+, MCP2515 (CAN Controller), TCAN1042 (CAN Transreceiver) .
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uname -a : Linux raspberrypi 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux
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sudo dmesg | grep mcp:
[ 8.299885] mcp251x spi0.0: MCP251x didn't enter in conf mode after reset
[ 8.300217] mcp251x spi0.0: Probe failed, err=110
[ 8.300343] mcp251x: probe of spi0.0 failed with error -110
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I tried modifying /boot/config.txt as below:
dtparam=spi=on
dtoverlay=mcp2515-can0, oscillator=8000000, interrupt=26
dtoverlay=mcp2515-can0-overlay.dtbo
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Also, i tried writing dts and adding its dtbo file in /boot/overlay folder.
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Please guide me what I am doing it wrong here.
Solution:Jump to solution
Yes, i updated but that was not the issue. The issue was 2 capacitors connected to external oscillator of MCP2515.
Finally, it was hardware issue.
Thanks for the help though..!...
8 Replies
dts file:
/*
* Device tree overlay for mcp251x/can0 on spi0.0
/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
fragment@0 { target = <&spi0>; overlay { status = "okay"; }; }; / the interrupt pin of the can-controller / fragment@1 { target = <&gpio>; overlay { can0_pins: can0_pins { brcm,pins = <26>; / it is the default pin and it will be overriden / brcm,function = <0>; / input / }; }; }; / the clock/oscillator of the can-controller / fragment@2 { target-path = "/clocks"; overlay { / external oscillator of mcp2515 on SPI0.0 / can0_osc: can0_osc { compatible = "fixed-clock"; #clock-cells = <0>; clock-frequency = <8000000>; }; }; }; / the spi config of the can-controller itself binding everything together / fragment@3 { target = <&spi0>; overlay { / needed to avoid dtc warning */ #address-cells = <1>; #size-cells = <0>; can0: mcp2515@0 { reg = <0>; compatible = "microchip,mcp2515"; pinctrl-names = "default"; pinctrl-0 = <&can0_pins>; spi-max-frequency = <10000000>; interrupt-parent = <&gpio>; interrupts = <26 0x2>; clocks = <&can0_osc>; }; }; }; };
fragment@0 { target = <&spi0>; overlay { status = "okay"; }; }; / the interrupt pin of the can-controller / fragment@1 { target = <&gpio>; overlay { can0_pins: can0_pins { brcm,pins = <26>; / it is the default pin and it will be overriden / brcm,function = <0>; / input / }; }; }; / the clock/oscillator of the can-controller / fragment@2 { target-path = "/clocks"; overlay { / external oscillator of mcp2515 on SPI0.0 / can0_osc: can0_osc { compatible = "fixed-clock"; #clock-cells = <0>; clock-frequency = <8000000>; }; }; }; / the spi config of the can-controller itself binding everything together / fragment@3 { target = <&spi0>; overlay { / needed to avoid dtc warning */ #address-cells = <1>; #size-cells = <0>; can0: mcp2515@0 { reg = <0>; compatible = "microchip,mcp2515"; pinctrl-names = "default"; pinctrl-0 = <&can0_pins>; spi-max-frequency = <10000000>; interrupt-parent = <&gpio>; interrupts = <26 0x2>; clocks = <&can0_osc>; }; }; }; };
@Marvee Amasi Any idea?
Hi @shardul17 your kernel version 5.10.103 is prolly around two years ago. I am not saying it is fully the cause of the MCP2515 CAN controller not entering configuration mode on your Raspberry Pi 3b+, but firstly consider updating your Raspberry Pi OS to a newer version.
Do the
&&
Newer kernels often have better driver support
Cus your
/boot/config.txt configuration is okay
So update && upgrade, run it and see if it worksOk. Thank you
Any other reasons you can think of??
It could be power supply attimes too , does your module receive the correct power voltage ? It's usually 3.3v
The dmesg output shows spi0.0 being used, make sure your MCP2515 module is connected to the correct SPI bus mostly usually SPI0 for Raspberry Pi, triple check the wiring based on your module's datasheet
But have you updated ? @shardul17
Solution
Yes, i updated but that was not the issue. The issue was 2 capacitors connected to external oscillator of MCP2515.
Finally, it was hardware issue.
Thanks for the help though..!
Okay 👍, Happy you were able to get it working
Yess..!! Thanks a lot..!