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_LPC1768.cpp

Revision:: 6:e9ab0bb912c8
Parent:: 5:d9f46ef80e20
Child:: 8:876f3b55e6f5

--- a/SimpleDMA_LPC1768.cpp	Sat Jan 04 14:42:33 2014 +0000
+++ b/SimpleDMA_LPC1768.cpp	Tue Mar 18 12:44:46 2014 +0000
@@ -84,18 +84,23 @@
     _callback.call();
 }
 
+static inline bool isMemory(uint32_t addr)
+{
+    return (addr >> 28) == 0 || (addr >> 28) == 1 || ((addr >= 0x2007C000) && (addr < (0x2007C000 + 0x8000)));
+}
+
 uint32_t getTransferType(SimpleDMA_Trigger trig, uint32_t source, uint32_t destination) {
     //If it is always, simply put it on memory-to-memory
     if (trig == Trigger_ALWAYS)
         return 0;
-    else if ((source >> 28) == 0 || (source >> 28) == 1) {       //if source is RAM/Flash
-        if ((destination >> 28) == 0 || (destination >> 28) == 1)        //if destination is RAM/flash
+    else if (isMemory(source)) {       //if source is RAM/Flash
+        if (isMemory(destination))        //if destination is RAM/flash
             return 3;                                                               //Return p2p for m2m with a trigger (since I have no idea wtf you are trying to do)
         else
             return 1;                                                               //Source is memory, destination is peripheral, so m2p
         }
     else {
-        if ((destination >> 28) == 0 || (destination >> 28))
+        if (isMemory(destination))
             return 2;                                                               //Source is peripheral, destination is memory
         else
             return 3;                                                               //Both source and destination are peripherals