I'm working on the STM32F1 device and have been reading the CAN filtering and masking process. I now understand how the ID mask and filter works. I do have one question though as in certain cases I'm unsure if the filter would work 100% correctly.
If I want to get the message from CAN ID 0x100 thru 0x12F, using a 29 bit identifier I would use the following mask and filter;
Filter: 0000 0000 0000 0000 0000 0001 0000 0000
Mask: 0001 1111 1111 1111 1111 1111 1100 0000
I can see how this filters for CAN IDs 0x100 thru 0x12F. But am I correct in thinking that this would also allow CAN IDs 0x130 thru 0x13F through also, as bits 5:4 are "Don't care" ?
Thanks,
Cod
