1 files changed, 34 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/core/ds2_dma.c b/sdk-modifications/libsrc/core/ds2_dma.c
new file mode 100644
index 0000000..0b0eca1
--- /dev/null
+++ b/sdk-modifications/libsrc/core/ds2_dma.c
@@ -0,0 +1,34 @@
+#include "ds2_dma.h"
+
+
+
+//register a DMA transfer request
+//ch: channel id request, there are 6 channles, 
+//irq_handler: the DMA interruption handle
+//arg: argument to the handle
+//mode: DMA mode, such as port width, address increased/fixed, and so on
+//type: DMA request type
+extern int dma_request(int ch, void (*irq_handler)(unsigned int), unsigned int arg,
+     unsigned int mode, unsigned int type);
+
+//start DMA transfer, must request a DMA first
+//ch: channel id
+//srcAddr: DMA source address
+//dstAddr: DMA destination address
+//count: DMA transfer count, the total bytes due the mode in dma_request
+extern void dma_start(int ch, unsigned int srcAddr, unsigned int dstAddr,
+         unsigned int count);
+
+
+int _dmaCopy(int ch, void *dest, void *src, unsigned int size, unsigned int flags){
+  int test = 0;
+  if(!(test = dma_request(ch, 0, 0,
+                        //increment dest addr
+                        DMAC_DCMD_DAI | flags,
+                        //auto request type
+                        DMAC_DRSR_RS_AUTO)))
+  {
+    dma_start(ch, (unsigned int)src, (unsigned int)dest, size);
+  }
+  return test;
+}