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芯片型号：TM4C123GH6PM
μDMA Transfer Mode的配置可以通过下面的寄存器来配置
Register 3: DMA Channel Control Word (DMACHCTL), offset 0x008
在例程内是使用uDMAModeSet来设置的，您可以看一下udma.h以及udma.c//*****************************************************************************// // DMA control modes that can be passed to uDMAModeSet() and returned // uDMAModeGet(). // //***************************************************************************** #define UDMA_MODE_STOP 0x00000000 #define UDMA_MODE_BASIC 0x00000001 #define UDMA_MODE_AUTO 0x00000002 #define UDMA_MODE_PINGPONG 0x00000003 #define UDMA_MODE_MEM_SCATTER_GATHER \ 0x00000004 #define UDMA_MODE_PER_SCATTER_GATHER \ 0x00000006 #define UDMA_MODE_ALT_SELECT 0x00000001
