CCS/TMDXRM57LHDK: SCI DMA Notification Problem

Part Number: TMDXRM57LHDK

Tool/software: Code Composer Studio

Hello,

I am working on a project that receives and processes a rather large amount of Sensor Data (2k Byte every 60ms). I have found and implemented the Example Code for SCI DMA successfully. So the problem I have is not with the actual receiving of Data, but rather with Notifications.

Ideally I would want to be notified once with every fully received package, so once every ~60ms. Right now I am using a Function that is called periodically every 1-2ms (with every µC Cycle) and should return true if a new Package is received and false in between. With my current Implementation it allways returns true. The Code is as follows:

bool DMATransfer()
{

    if(dmaGetInterruptStatus(DMA_CH1, LFS))
    {
        // Restart
        sciREG4->CLEARINT |= SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;
        dmaSetChEnable(DMA_CH1, DMA_HW);
        sciREG4->SETINT |= SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;
        
        return true;
    }

    return false;
}

I would greatly appreciate any advice to solve this problem.

Regards,

Lars