用DMA把内部RAM数据传输到外部RAM，传送1个字节的速度只有250K。传送1个字节的速度能提高到2M吗？怎么才能提高速度？
下面是我的DMA设置：
DMA_Cmd(DMA1_Channel6, DISABLE);
DMA_InitStructure.DMA_PeripheralBaseAddr = disp_buff_addr;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0X6C001000;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 200;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize= DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
DMA_Init(DMA1_Channel6, &DMA_InitStructure);
CurrDataCounterBegin = DMA_GetCurrDataCounter(DMA1_Channel6);
DMA_Cmd(DMA1_Channel6, ENABLE); |
|
楼主
