MATLAB XPC TARGET 4 - DEVICE DRIVERS Spezifikationen PDF herunterladen (Seite 183)

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101

Acceptance Filters

5-39

using decimal numbers. You can use the MATLAB function ‘hex2dec’ to also

define hexadecimal numbers in the dialog box entry.

Lets assume a CAN application where messages with the following identifiers

(standard) are crossing the CAN network:

2-30, 48-122 (decimal)

Additionally, only incoming messages 4-29 have to be processed by the target

application. Ideally, all messages not having identifier 4-29 would be filtered

out, but the mask and code parameters don’t allow this exact scheme. The

closest we can achieve here, is filtering out all messages with identifiers above

31 by using value 2047-31=2016 for the mask parameter and value 0 for the

code parameter. The messages with identifier 0,1,2, and 3 cannot be filtered

out and will be returned by the FIFO read driver block, even if they have not

to be processed by the target application.

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