pkarashchenko commented on issue #10912: URL: https://github.com/apache/nuttx/issues/10912#issuecomment-1764416504
> I have a [PR](https://github.com/apache/nuttx/pull/10911) up which fixes the overrun in `imxrt_dma_nextrx()`. The other half of the fix which I haven't included in the PR is to place the `g_lpuart{1-8}rxfifo` into TCM. It fixes the issue but what I don't understand is why our call to `up_invalidate_dcache()` [here](https://github.com/apache/nuttx/blob/master/arch/arm/src/imxrt/imxrt_serial.c#L2724) isn't sufficient. > > @davids5 @xiaoxiang781216 Do either of u have any thoughts on what's going on? Maybe you can move ``` up_invalidate_dcache((uintptr_t)priv->rxfifo, (uintptr_t)priv->rxfifo + RXDMA_BUFFER_SIZE); ``` from `imxrt_dma_rxcallback` to `imxrt_dma_setup` before `imxrt_dmach_xfrsetup(priv->rxdma , &config);` call? Not sure if that will work, but worth of trying -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
