最近在学习bf609dma，想用二维搬移一副图像 width=720×2，height=480， 数据大小是1BYTE的，下面是我配置的，但是搬移的不对，请高手帮忙，谢谢.....
#define MEM_SIZE_32 0x200
#define COPY_2D 0x04000000
void DMA_Copy(uint8_t src[], uint8_t dst[])
{
/* configure destination registers */
*pREG_DMA22_CFG = BITM_DMA_CFG_WNR | MEM_SIZE_32| COPY_2D;
*pREG_DMA22_ADDRSTART = dst;
*pREG_DMA22_XCNT = 720*2;
*pREG_DMA22_XMOD = 4;
*pREG_DMA22_YCNT = 480;
*pREG_DMA22_YMOD = 1;
/* configure source registers */
*pREG_DMA21_CFG = MEM_SIZE_32|COPY_2D ;
*pREG_DMA21_ADDRSTART = src;
*pREG_DMA21_XCNT = 720*2;
*pREG_DMA21_XMOD = 4;
*pREG_DMA21_YCNT = 480;
*pREG_DMA21_YMOD = 1;
/* enable DMA */
*pREG_DMA21_CFG |= 0x1;
*pREG_DMA22_CFG |= 0x1;
/* wait here if DMA_DONE is a 0x0 because the DMA
is still going */
while( (*pREG_DMA22_STAT & BITM_DMA_STAT_IRQDONE) == 0x0 )
{};
/* turn off DMA */
*pREG_DMA22_CFG = 0x0;
*pREG_DMA21_CFG = 0x0;
/* clear the DMA_DONE bit */
*pREG_DMA22_STAT = 0x1;
}
您的位置：
2013/11/11 11:39:06
