I'm working with the i.mx28 EVK and try to add some id-filtering, using the message buffers in combination with the individual mask registers (bcc bit asserted). What I can not find, is how to set the filter for Extended or Standard frames. In the message buffer, the msb-bits of the 32-bit ID-register contain the PRIO bits. The IDE-bit is part of the 1st 32-bit register (bit 21). But how does this map to the Mask register? Do bits 31-29 have a function here?
Thanks in advance for your reply,
N.B. This question does not apply to the filter configuration for the Rx Fifo part. Here it is clear how to set the EXT-bit for the various formats in the ID table.