Introduction

SimpleDMA is a standard library for different DMA peripherals. Currently the LPC1768, KL46Z and KL25Z are supported. It provided one set of functions for different peripherals. It does not allow for usage of all the advanced functions, partially because the goal was to provide a simple interface, and partially because they are different for different microcontrollers.

Examples

Helloworld: http://mbed.org/users/Sissors/code/SimpleDMA_HelloWorld/

Example in a library (SPI): http://mbed.org/users/Sissors/code/RTOS_SPI/

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;
+    }  
+}
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