Invalidating Cache

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greenwichmeanie
Contributor III

We're using an S32K341. I understand that I can place DMA buffers into a noncacheable region but I'd prefer to perform DMA transfers and invalidate / clean cache by address.

We're using the RTD. Searching through the install, we can see these "by address" cache commands in files `Cache_IP.c/.h` but they weren't generated with our `.mex` file.

In the past I have used the CMSIS interface to perform this task but the code doesn't appear set up for this as far as I can tell.

For some background, we're using C++ and I've defined a class that will enforce the alignment and padding to the cache line lengths. I have a UART driver that encapsulates the RTD UART calls.

How can I access these cache functions?

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386件の閲覧回数
PetrS
NXP TechSupport
NXP TechSupport

Hi,

you need to add Cache_Ip component into your project in Peripherals tool, enable CACHE support in it and finally Update code.

PetrS_0-1763982932209.png

BR, Petr

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387件の閲覧回数
PetrS
NXP TechSupport
NXP TechSupport

Hi,

you need to add Cache_Ip component into your project in Peripherals tool, enable CACHE support in it and finally Update code.

PetrS_0-1763982932209.png

BR, Petr

%3CLINGO-SUB%20id%3D%22lingo-sub-2243129%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%81%AE%E7%84%A1%E5%8A%B9%E5%8C%96%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2243129%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%3CP%3ES32K341%E3%82%92%E4%BD%BF%E7%94%A8%E3%81%97%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99%E3%80%82DMA%20%E3%83%90%E3%83%83%E3%83%95%E3%82%A1%E3%82%92%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E4%B8%8D%E5%8F%AF%E8%83%BD%E3%81%AA%E9%A0%98%E5%9F%9F%E3%81%AB%E9%85%8D%E7%BD%AECAN%E3%81%93%E3%81%A8%E3%81%AF%E7%90%86%E8%A7%A3%E3%81%97%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99%E3%81%8C%E3%80%81DMA%20%E8%BB%A2%E9%80%81%E3%82%92%E5%AE%9F%E8%A1%8C%E3%81%97%E3%80%81%E3%82%A2%E3%83%89%E3%83%AC%E3%82%B9%E3%81%94%E3%81%A8%E3%81%AB%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%82%92%E7%84%A1%E5%8A%B9%E5%8C%96%2F%E6%B6%88%E5%8E%BB%E3%81%99%E3%82%8B%E3%81%93%E3%81%A8%E3%82%92%E5%B8%8C%E6%9C%9B%E3%81%97%E3%81%BE%E3%81%99%E3%80%82%3C%2FP%3E%3CP%3ERTD%E3%82%92%E4%BD%BF%E7%94%A8%E3%81%97%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99%E3%80%82%E3%82%A4%E3%83%B3%E3%82%B9%E3%83%88%E3%83%BC%E3%83%AB%E3%82%92%E6%A4%9C%E7%B4%A2%E3%81%99%E3%82%8B%E3%81%A8%E3%80%81%60Cache_IP.c%2F.h%60%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%81%AB%E3%81%93%E3%82%8C%E3%82%89%E3%81%AE%E3%80%8C%E3%82%A2%E3%83%89%E3%83%AC%E3%82%B9%E3%81%AB%E3%82%88%E3%82%8B%E3%80%8D%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%82%B3%E3%83%9E%E3%83%B3%E3%83%89%E3%81%8C%E8%A6%8B%E3%81%A4%E3%81%8B%E3%82%8A%E3%81%BE%E3%81%99%E3%81%8C%E3%80%81%60.mex%60%E3%81%A7%E3%81%AF%E7%94%9F%E6%88%90%E3%81%95%E3%82%8C%E3%81%BE%E3%81%9B%E3%82%93%E3%81%A7%E3%81%97%E3%81%9F%E3%80%82%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%80%82%3C%2FP%3E%3CP%3E%E9%81%8E%E5%8E%BB%E3%81%AB%E3%80%81%E3%81%93%E3%81%AE%E3%82%BF%E3%82%B9%E3%82%AF%E3%82%92%E5%AE%9F%E8%A1%8C%E3%81%99%E3%82%8B%E3%81%9F%E3%82%81%E3%81%AB%20CMSIS%20%E3%82%A4%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%95%E3%82%A7%E3%83%BC%E3%82%B9%E3%82%92%E4%BD%BF%E7%94%A8%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F%E3%81%8C%E3%80%81%E7%A7%81%E3%81%AE%E7%9F%A5%E3%82%8B%E9%99%90%E3%82%8A%E3%80%81%E3%81%93%E3%81%AE%E3%81%9F%E3%82%81%E3%81%AB%E3%82%B3%E3%83%BC%E3%83%89%E3%81%8C%E8%A8%AD%E5%AE%9A%E3%81%95%E3%82%8C%E3%81%A6%E3%81%84%E3%81%AA%E3%81%84%E3%82%88%E3%81%86%E3%81%A7%E3%81%99%E3%80%82%3C%2FP%3E%3CP%3E%E8%83%8C%E6%99%AF%E3%81%A8%E3%81%97%E3%81%A6%E3%80%81%E7%A7%81%E3%81%9F%E3%81%A1%E3%81%AF%20C%2B%2B%20%E3%82%92%E4%BD%BF%E7%94%A8%E3%81%97%E3%81%A6%E3%81%8A%E3%82%8A%E3%80%81%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%20%E3%83%A9%E3%82%A4%E3%83%B3%E3%81%AE%E9%95%B7%E3%81%95%E3%81%AB%E5%90%88%E3%82%8F%E3%81%9B%E3%81%A6%E3%82%A2%E3%83%A9%E3%82%A4%E3%83%A1%E3%83%B3%E3%83%88%E3%81%A8%E3%83%91%E3%83%87%E3%82%A3%E3%83%B3%E3%82%B0%E3%82%92%E5%BC%B7%E5%88%B6%E3%81%99%E3%82%8B%E3%82%AF%E3%83%A9%E3%82%B9%E3%82%92%E5%AE%9A%E7%BE%A9%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F%E3%80%82RTD%20UART%20%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%97%E3%82%92%E3%82%AB%E3%83%97%E3%82%BB%E3%83%AB%E5%8C%96%E3%81%99%E3%82%8B%20UART%20%E3%83%89%E3%83%A9%E3%82%A4%E3%83%90%E3%81%8C%E3%81%82%E3%82%8A%E3%81%BE%E3%81%99%E3%80%82%3C%2FP%3E%3CP%3E%E3%81%93%E3%82%8C%E3%82%89%E3%81%AE%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E6%A9%9F%E8%83%BD%E3%81%AB%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B9%E3%81%99%E3%82%8B%E3%81%AB%E3%81%AF%E3%81%A9%E3%81%86%E3%81%99%E3%82%8C%E3%81%B0%E3%82%88%E3%81%84%E3%81%A7%E3%81%97%E3%82%87%E3%81%86%E3%81%8B%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E