Stream cache buffer not used completely (causing extra read)

[ghnicolas]

Hello,
In file legato_stream.c, seems that following condition prevent from using the cached buffer completely (thus causing extra reads)
Line 111
// requested data is in the local cache
if((uint32_t)addr >= stream->cache.baseAddress &&
(uint32_t)addr - stream->cache.baseAddress + size < stream->cache.logicalSize)
Need to change for following ?
(uint32_t)addr - stream->cache.baseAddress + size <= stream->cache.logicalSize)

Also, I am using a 16k cache buffer. Sometimes when iterating in the function leStream_Read the variable stream->cache.baseAddress seems to have been reseted to 0 in the middle of a transfer which causes to reload from external memory at some point where the cache buffer should still be used. Didn't find out for now.

Regards
Nicolas

[scottdmorgan]

I recall seeing the same odd behavior while debugging the streaming in my project. I am using the stream to read a splash screen graphic from a MicroSD card to display when my device starts up.

[MCHP-MCU32DC0]

Thanks for reporting this issue. We'll take a look.

[ghnicolas]

For the issue where the variable stream->cache.baseAddress is reseted, this is more systematic when changing the image in the widget using setImage function. At some point in the function stage_sourceIterateSetup the state->sourceRect.height is incorrect and the state->done is set to TRUE.
Regards