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/

SimpleDMA_common.cpp

Committer:: wkleunen
Date:: 2017-05-12
Revision:: 9:f7345d41b076
Parent:: 5:d9f46ef80e20

File content as of revision 9:f7345d41b076:

#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;
    }  
}