Patrick Bader / SimpleDMA

A simple library to access the DMA functionality.

Fork of SimpleDMA by Erik -

SimpleDMA_common.cpp@5:d9f46ef80e20, 2014-01-04 (annotated)

Committer:
Sissors
Date:
Sat Jan 04 14:42:33 2014 +0000
Revision:
5:d9f46ef80e20
Refactored code, added LPC1768 support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 5:d9f46ef80e20 1 #include "SimpleDMA.h"
Sissors 5:d9f46ef80e20 2
Sissors 5:d9f46ef80e20 3 void SimpleDMA::channel(int chan) {
Sissors 5:d9f46ef80e20 4 if (chan == -1) {
Sissors 5:d9f46ef80e20 5 auto_channel = true;
Sissors 5:d9f46ef80e20 6 _channel = 0;
Sissors 5:d9f46ef80e20 7 } else {
Sissors 5:d9f46ef80e20 8 auto_channel = false;
Sissors 5:d9f46ef80e20 9 if (chan >= 0 && chan < DMA_CHANNELS)
Sissors 5:d9f46ef80e20 10 _channel = chan;
Sissors 5:d9f46ef80e20 11 else
Sissors 5:d9f46ef80e20 12 _channel = DMA_CHANNELS-1;
Sissors 5:d9f46ef80e20 13 }
Sissors 5:d9f46ef80e20 14 }
Sissors 5:d9f46ef80e20 15
Sissors 5:d9f46ef80e20 16 int SimpleDMA::getFreeChannel(void) {
Sissors 5:d9f46ef80e20 17 int retval = 0;
Sissors 5:d9f46ef80e20 18 while(1) {
Sissors 5:d9f46ef80e20 19 if (!isBusy(retval))
Sissors 5:d9f46ef80e20 20 return retval;
Sissors 5:d9f46ef80e20 21 retval++;
Sissors 5:d9f46ef80e20 22 if (retval >= DMA_CHANNELS)
Sissors 5:d9f46ef80e20 23 retval = 0;
Sissors 5:d9f46ef80e20 24 }
Sissors 5:d9f46ef80e20 25 }