(Solved) can bus with mcp2515 on pi v3 - Raspberry Pi Forums

-

it took me weeks can bus working mcp2515 on pi v3. find many threads mentioning problem:

code: select all

cannot find device "can0"
in response

code: select all

sudo /sbin/ip link set can0 type can bitrate 500000
looking dmesg see:

code: select all

mcp251x spi0.0: cannot initialize mcp2515. wrong wiring? mcp251x spi0.0: probe failed, err=19
happens when spi speed high mcp2515. on new pi boards default spi speed 10mhz. slow down changing overlay configuration.

code: select all

sudo vi /boot/config.txt
change lines to:

code: select all

dtparam=spi=on dtoverlay=mcp2515-can0,oscillator=16000000,interrupt=25,spimaxfrequency=500000 dtoverlay=spi0-hw-cs
suggest starting slow, 500khz shown above. work way until mcp2515 fails respond.

reference, running:

code: select all

uname -a linux raspberrypi 4.9.35-v7+ #1014 smp fri jun 30 14:47:43 bst 2017 armv7l gnu/linux



raspberrypi



Comments

  1. Unknown6 March 2018 at 08:10

    I am wroking on UP2 and I have the same error but your solution doesn't work for me ! Any ideas ??

    ReplyDelete

Post a Comment

Popular posts from this blog

ffmpeg h264_omx encoder - libomxcore.so missing. - Raspberry Pi Forums

-
linux raspberrypi 4.9.56-v7+ #1044 smp fri oct 13 15:23:13 bst 2017 armv7l gnu/linux fmpeg version 3.2.5-1 when try use h264_omx encoder [h264_omx @ 0x4eb940] libomx_core.so not found [h264_omx @ 0x4eb940] libomxcore.so not found tried apt-file find 2 files don't seem part of package?! where/how should find them? in advance! after research learned omx layer in raspbian handled libomxil-bellagio library. fact ffmpeg apparently expecting different library suggest there's wrong raspbian ffmpeg package? anyway, recompiled ffmpeg myself , got h264_omx encoder work. raspberrypi
Read more

Help with Missing Filename Error?

-
Image
hello everyone! having issue code have had no issues running before. today while trying upload code (no changes made) received error: avr-g++: error: missing filename after '-o' exit status 1 error compiling. this first time have received error. mean? using fastled library adafruit pro trinket. here code using. code: [select] #include <fastled.h> #define led_pin_a     5   // pin connecting left side bank of helmet leds #define led_pin_b     6   // pin connecting right side #define buttonpin     3   //  button change patterns #define num_leds    32    // num of ws2811 leds in each - total 32 x 2 = 64 #define brightness  255 #define led_type    ws2811 #define color_order grb crgb leds[num_leds]; #define updates_per_second 100 crgbpalette16 currentpalette; tblendtype    currentblending; extern crgbpalette16 myredwhitebluepalette; extern const ...
Read more

DNSServer.h ?

-
i attempting setup example using esp8266 wifi when compiling code keeps failing dnsserver.h not found after lots of searching unable locate download can please give me link on can download needed files install libraries. it's in esp8266 core arduino. this package on github:- https://github.com/esp8266/arduino if read linked page, it's apparently installable via arduino "boards manager", entering appropriate url "additional board manager urls" field in >file >preferences i think can safely ignore instruction install ide v1.6.8, (it's not stable). either ide v1.6.5 or v1.6.9 better. the url enter:- http://arduino.esp8266.com/stable/package_esp8266com_index.json Arduino Forum > Using Arduino > Programming Questions > DNSServer.h ? arduino
Read more