Interrupt from concurrent CAN channels stopping

lpcware — Wed, 15 Jun 2016 18:38:10 GMT

Content originally posted in LPCWare by Randy Nuss on Sat Mar 16 14:14:07 MST 2013
I'm using both CAN channels of the lpc4337. Each physical CAN bus is a 250kHz bus -what the actual data rates are I can't say for sure. A single channel is processed fine. When both channels are enabled, I receive data for a short time (few seconds maybe) then CAN-receive interrupts just stop. This never occurred when I interfaced to the very same buses using an lpc17xx.

I'm using the event-router interrupt for the CCAN which provides a single interrupt for either CAN channel.

Could there be an arbitration issue with the two interrupt sources and the single event-router interrupt? I noticed there are separate interrupts available for the two CAN channels -maybe I should try those instead of the event-router?

Is a halt of interrupts possible if data isn't read in time? Is it possible this is not a concurrent channel issue but a higher data issue? I am running the lpc4337 at 90MHz, but again the lpc17xx was running slower and doing ok.

I haven't been back on the hardware yet to try and trap any error conditions the CAN interrupt handler might indicate.

LPC Microcontrollers中的主题 Interrupt from concurrent CAN channels stopping

Interrupt from concurrent CAN channels stopping