Erik - / SimpleDMA

DMA library for the KL25Z

Dependents:   SimpleDMA_HelloWorld RTOS_SPI spiDMAtest Pinscape_Controller_v1 ... more

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Show/hide line numbers SimpleDMA_common.cpp Source File

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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