example1.h

00001 #include "mbed.h"
00002 #include "MODDMA.h"
00003 #include "MODSERIAL.h"
00004 
00005 DigitalOut led1(LED1);
00006 DigitalOut led2(LED2);
00007 DigitalOut led3(LED3);
00008 DigitalOut led4(LED4);
00009 MODDMA dma;
00010 MODSERIAL pc(USBTX, USBRX);
00011 
00012 // Function prototypes for IRQ callbacks.
00013 // See definitions following main() below.
00014 void dmaTCCallback(void);
00015 void dmaERRCallback(void);
00016 void TC0_callback(void);
00017 void ERR0_callback(void);
00018 
00019 int main() {
00020     char s[] = "**DMA** ABCDEFGHIJKLMNOPQRSTUVWXYZ **DMA**";
00021     
00022     pc.baud(PC_BAUD);
00023     
00024     dma.attach_tc( &dmaTCCallback );
00025     dma.attach_err( &dmaERRCallback );
00026     
00027     MODDMA_Config *config = new MODDMA_Config;
00028     config
00029      ->channelNum    ( MODDMA::Channel_0 )
00030      ->srcMemAddr    ( (uint32_t) &s )
00031      ->dstMemAddr    ( 0 )
00032      ->transferSize  ( sizeof(s) )
00033      ->transferType  ( MODDMA::m2p )
00034      ->transferWidth ( 0 )
00035      ->srcConn       ( 0 )
00036      ->dstConn       ( MODDMA::UART0_Tx )
00037      ->dmaLLI        ( 0 )
00038      ->attach_tc     ( &TC0_callback )
00039      ->attach_err    ( &ERR0_callback )
00040     ; // config end
00041     
00042     // Setup the configuration.
00043     dma.Setup(config);
00044     
00045     //dma.Enable( MODDMA::Channel_0 );
00046     //dma.Enable( config->channelNum() );
00047     dma.Enable( config );
00048     
00049     while (1) {
00050         led1 = !led1;
00051         wait(0.25);        
00052     }
00053 }
00054 
00055 // Main controller TC IRQ callback
00056 void dmaTCCallback(void) {
00057     led2 = 1;
00058 }
00059 
00060 // Main controller ERR IRQ callback
00061 void dmaERRCallback(void) {
00062     error("Oh no! My Mbed exploded! :( Only kidding, find the problem");
00063 }
00064 
00065 // Configuration callback on TC
00066 void TC0_callback(void) {
00067     MODDMA_Config *config = dma.getConfig();
00068     dma.haltAndWaitChannelComplete( (MODDMA::CHANNELS)config->channelNum());
00069     dma.Disable( (MODDMA::CHANNELS)config->channelNum() );
00070     
00071     // Configurations have two IRQ callbacks for TC and Err so you 
00072     // know which you are processing. However, if you want to use 
00073     // a single callback function you can tell what type of IRQ 
00074     // is being processed thus:-
00075     if (dma.irqType() == MODDMA::TcIrq)  {
00076         led3 = 1;
00077         dma.clearTcIrq();
00078     }
00079     if (dma.irqType() == MODDMA::ErrIrq) {
00080         led4 = 1;
00081         dma.clearErrIrq();
00082     }
00083 }
00084 
00085 // Configuration cakllback on Error
00086 void ERR0_callback(void) {
00087     error("Oh no! My Mbed exploded! :( Only kidding, find the problem");
00088 }
00089