static void
SetupSGMemTransfer(unsigned long ulChannel,void *pvSrcBuf0,
void *pvSrcBuf1,void *pvDstBuf,unsigned long size)
{
//
// Create task0
//
tDMAControlTable task0=uDMATaskStructEntry(size, UDMA_SIZE_8,
UDMA_SRC_INC_8, pvSrcBuf0,
UDMA_DST_INC_8,pvDstBuf,
UDMA_ARB_8, UDMA_MODE_MEM_SCATTER_GATHER);
//
// create task1
//
tDMAControlTable task1=uDMATaskStructEntry(size, UDMA_SIZE_8,
UDMA_SRC_INC_8, pvSrcBuf1,
UDMA_DST_INC_8, (char *)pvDstBuf+size,
UDMA_ARB_8, UDMA_MODE_AUTO);
//
// Copy to TaskList
//
memcpy(&TaskList[0],&task0,sizeof(tDMAControlTable));
memcpy(&TaskList[1],&task1,sizeof(tDMAControlTable));
memset(pvDstBuf,0,size);
//
// Setup Scatter Gather with two tasks
//
MAP_uDMAChannelScatterGatherSet(ulChannel, 2,TaskList,0);
MAP_uDMAChannelEnable(ulChannel);
}
// fragment buffers. These are memory to memory operations, but using the
// peripheral channel.
//
// Task 4-6: each copy one of the fragment buffers to the UART using peripheral
// scatter-gather transfer.
//
// For all the tasks, the data size and increment sizes are 8-bits.
//
//*****************************************************************************
tDMAControlTable g_TaskTableSrc[] =
{
//
// Task 1: copy source buffer fragment 1
//
uDMATaskStructEntry(sizeof(g_ucSrcBuf1), UDMA_SIZE_8,
UDMA_SRC_INC_8, &g_ucSrcBuf[SRC_IDX_1],
UDMA_DST_INC_8, g_ucSrcBuf1,
UDMA_ARB_8, UDMA_MODE_PER_SCATTER_GATHER),
//
// Task 2: copy source buffer fragment 2
//
uDMATaskStructEntry(sizeof(g_ucSrcBuf2), UDMA_SIZE_8,
UDMA_SRC_INC_8, &g_ucSrcBuf[SRC_IDX_2],
UDMA_DST_INC_8, g_ucSrcBuf2,
UDMA_ARB_8, UDMA_MODE_PER_SCATTER_GATHER),
//
// Task 3: copy source buffer fragment 3
//
uDMATaskStructEntry(sizeof(g_ucSrcBuf3), UDMA_SIZE_8,
UDMA_SRC_INC_8, &g_ucSrcBuf[SRC_IDX_3],
