private void DmaTransfer(byte[] data, int bytes, DataDirection direction)
{
Place source, destination;
uint currentDescriptorAddress = descriptorListBaseAddress;
int bytesTransferred = 0;
while (bytesTransferred < bytes)
{
int bytesLeft = bytes - bytesTransferred;
var currentDescriptor = new SunxiDMADescriptor(currentDescriptorAddress, dmaEngine);
int bytesToTransfer = currentDescriptor.BufferSize > bytesLeft ? bytesLeft : (int)currentDescriptor.BufferSize;
if (direction == DataDirection.ReadFromSD)
{
destination = currentDescriptor.BufferAddress;
source = new Place(data, bytesTransferred);
}
else
{
destination = new Place(data, bytesTransferred);
source = currentDescriptor.BufferAddress;
}
var request = new Request(source, destination, bytesToTransfer, TransferType.DoubleWord, TransferType.DoubleWord);
dmaEngine.IssueCopy(request);
currentDescriptor.Release();
bytesTransferred += bytesToTransfer;
currentDescriptorAddress = currentDescriptor.NextDescriptor;
}
}
private void DmaTransfer(byte[] data, int bytes, DataDirection direction)
{
Place source, destination;
uint currentDescriptorAddress = descriptorListBaseAddress;
int bytesTransferred = 0;
while(bytesTransferred < bytes)
{
int bytesLeft = bytes - bytesTransferred;
var currentDescriptor = new SunxiDMADescriptor(currentDescriptorAddress, dmaEngine);
int bytesToTransfer = currentDescriptor.BufferSize > bytesLeft ? bytesLeft : (int) currentDescriptor.BufferSize;
if(direction == DataDirection.ReadFromSD)
{
destination = currentDescriptor.BufferAddress;
source = new Place(data, bytesTransferred);
}
else
{
destination = new Place(data, bytesTransferred);
source = currentDescriptor.BufferAddress;
}
var request = new Request(source, destination, bytesToTransfer, TransferType.DoubleWord, TransferType.DoubleWord);
dmaEngine.IssueCopy(request);
currentDescriptor.Release();
bytesTransferred += bytesToTransfer;
currentDescriptorAddress = currentDescriptor.NextDescriptor;
}
}
