Patrick Bader
A simple library to access the DMA functionality.
Diff: SimpleDMA_common.cpp
- Revision:
- 5:d9f46ef80e20
diff -r c3a84c6c432c -r d9f46ef80e20 SimpleDMA_common.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SimpleDMA_common.cpp Sat Jan 04 14:42:33 2014 +0000
@@ -0,0 +1,25 @@
+#include "SimpleDMA.h"
+
+void SimpleDMA::channel(int chan) {
+ if (chan == -1) {
+ auto_channel = true;
+ _channel = 0;
+ } else {
+ auto_channel = false;
+ if (chan >= 0 && chan < DMA_CHANNELS)
+ _channel = chan;
+ else
+ _channel = DMA_CHANNELS-1;
+ }
+}
+
+int SimpleDMA::getFreeChannel(void) {
+ int retval = 0;
+ while(1) {
+ if (!isBusy(retval))
+ return retval;
+ retval++;
+ if (retval >= DMA_CHANNELS)
+ retval = 0;
+ }
+}
\ No newline at end of file