A simple library to access the DMA functionality.
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SimpleDMA_common.cpp
00001 #include "SimpleDMA.h" 00002 00003 void SimpleDMA::channel(int chan) { 00004 if (chan == -1) { 00005 auto_channel = true; 00006 _channel = 0; 00007 } else { 00008 auto_channel = false; 00009 if (chan >= 0 && chan < DMA_CHANNELS) 00010 _channel = chan; 00011 else 00012 _channel = DMA_CHANNELS-1; 00013 } 00014 } 00015 00016 int SimpleDMA::getFreeChannel(void) { 00017 int retval = 0; 00018 while(1) { 00019 if (!isBusy(retval)) 00020 return retval; 00021 retval++; 00022 if (retval >= DMA_CHANNELS) 00023 retval = 0; 00024 } 00025 }
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