Debugging I2S Memory issues
For a few days now I have had this issue where my audio thread’s i2s peripheral ran out of memory below are a few things I have tried.
Checks
- Microphone data format
- Microphone alignment of bits
- How to use Mem Slabs
- How much time do out Mem Slabs hold
- Check I2S State
The Issue!
Turned out to be how I was invoking k_mem_slab_free(), you see zephyr expects a (void *)
for the second argument of the function and I was passing in a pointer without casting it, t
this caused that function to fail quietly which led to me running out memory blocks
void *mem_block;
....
int32_t *samples = mem_block;
LOG_WRN("Sample number 5 in the Block Samples: %d", samples[5];
- k_mem_slab_free(&mem_slab, mem_block);
+ k_mem_slab_free(&mem_slab, (void *)mem_block);
Turns out this simple change is all I needed and I needed it even though the pointer was a void *
I guess this is like the thing they say about infinities, some infinities are bigger or smaller than
others, …
Links zephyr mem slabs