Electronics > Projects, Designs, and Technical Stuff
Help can not make MCP2515 to work
Jawad:
Hello guys.
I need some serious help here.
I spent the whole day trying to figure out what is the problem with my design since my MCP2515 canbus is not sending or receiving any data.
I followed this tutorial and made the example on a breadboard it worked fine.I want to use this to listen to my car canbus to display some custom data on the screen.
so on the breadboard everything is working fine
the problem is I designed my own PCB and printed some samples in china and now it seems that it is working but it is not sending or receiving any data (CANH and CANL are 2.5v) on the breadboard the same sketch and schematic is working great
I need to solve this as soon as possible spent the whole day trying to figure out what is missing
please check what is wrong with the design or guide me on how to diagnose the problem
any help will be appreciated
JagV12:
I've never used EasyEDA but it looks like the layout is not finished yet ! The ratline shows that GND is not routed. Did you add a ground plane that is not displayed here ?
On the schematic, is L1 wired as it should ? Did you check the power rails voltage ?
Wiring around LM2596S-ADJ should be cleaned up (rearranged) so errors could become obvious...
Jawad:
I'm just a beginner this is the first time i make a design and first time using easyeda
The design is finished.I think GND is connected.it is on top and bottom planes i think you should click on the coper area marked with dotted line and click update copper area to see it on your side
Are the L1 connection wrong ? Since all i did is to copy schematic from the 3 modules i used
What is wrong with L1 ?
JagV12:
If this attachment is your model, double check your wiring (R2 & L1), it is wrong ! And I didn't notice but you have a second voltage regulator (mic5205-5.0ym5) after the first one and a diode (D2). Why all that ?
Does this circuit REALLY work on the breadboard as per your schematic ?
And once again, did you check the various power rails voltage ?
Pinkus:
To narrow it down: did you check your MCP2515 if it is sending/receiving data on its TXCan / RXCan lines?
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