void Init_PPI(void)
{
    int Number_of_Samples = 16;
    int Number_of_Frames = 1;
    int DMA_RX_first = 1;
// configure PPI
    *pPPI_CONTROL = DMA32 | XFR_TYPE | 0x70 | 0x3800;
    *pPPI_DELAY   = 0x0000;
    *pPPI_COUNT   = Number_of_Samples - 1;
    *pPPI_FRAME   = Number_of_Frames;

// configure PPI DMA ( channel 0)
//    *pPERIPHERAL_MAP = 0x00;
    *pDMA0_CONFIG = 0x00C0 | WDSIZE_16 | WNR;
    *pDMA0_NEXT_DESC_PTR = (&DMA_RX_first);
    *pDMA0_X_MODIFY = 8;
    *pDMA0_X_COUNT = Number_of_Samples;

    *pDMA0_CONFIG = *pDMA0_CONFIG | DMAEN;
    ssync();
    *pPPI_CONTROL |= PORT_EN;    
    ssync();
}