Extern interrupt EIF FLAG cannot be cleared

[Harry0001]

I used the EIF8 to configuate the interrupt,and i am acknowlaged that the flag can be cleared by writting 1 to EIF8,as the following code shows.However,i checked the register and find that the flag value still is 1!

Please confirm it ,thanks! 

[KarlP · Accepted solution]

== is a comparison, change it to =

[davidtosenovjan]

Also you should use .R instance for clearing status flags.

Here I would recommend to pay attention to following document, especially sections 3.2, as it is sources of issues quite often:
http://www.nxp.com/files/32bit/doc/eng_bulletin/EB758.pdf

[Harry0001]

Thanks for your reply,but the link tell me "Page Not Found",could you send it to my email:fuminhui02@163.com，thanks!

[davidtosenovjan]

I am sorry, link has been changed to:

https://www.nxp.com/docs/en/engineering-bulletin/EB758.pdf