example1.h

00001 #include "mbed.h"
00002 #include "MODDMA.h"
00003 
00004 DigitalOut  led1(LED1);
00005 DigitalOut  led2(LED2);
00006 DigitalOut  led3(LED3);
00007 DigitalOut  led4(LED4);
00008 MODDMA      dma;
00009 
00010 // Function prototypes for IRQ callbacks.
00011 // See definitions following main() below.
00012 void        dmaTCCallback(void);
00013 void        dmaERRCallback(void);
00014 void        TC0_callback(void);
00015 void        ERR0_callback(void);
00016 
00017 /**
00018  * @brief
00019  * @note
00020  * @param
00021  * @retval
00022  */
00023 int main()
00024 {
00025     char    s[] = "**DMA** ABCDEFGHIJKLMNOPQRSTUVWXYZ **DMA**";
00026 
00027     printf("\r\nStarting\r\n");
00028 
00029     dma.attach_tc(&dmaTCCallback);
00030     dma.attach_err(&dmaERRCallback);
00031 
00032     MODDMA_Config*  config = new MODDMA_Config;
00033 
00034     config->channelNum(MODDMA::Channel_0);
00035     config->srcMemAddr((uint32_t) & s);
00036     config->dstMemAddr(0);
00037     config->transferSize(sizeof(s));
00038     config->transferType(MODDMA::m2p);
00039     config->transferWidth(0);
00040     config->srcConn(0);
00041     config->dstConn(MODDMA::UART0_Tx);
00042     config->dmaLLI(0)->attach_tc(&TC0_callback);
00043     config->attach_err(&ERR0_callback);
00044 
00045     // Setup the configuration.
00046     dma.Setup(config);
00047 
00048     //dma.Enable( MODDMA::Channel_0 );
00049     //dma.Enable( config->channelNum() );
00050     dma.Enable(config);
00051 
00052     while (1) {
00053         led1 = !led1;
00054         ThisThread::sleep_for(250ms);
00055     }
00056 }
00057 
00058 // Main controller TC IRQ callback
00059 void dmaTCCallback(void)
00060 {
00061     led2 = 1;
00062 }
00063 
00064 // Main controller ERR IRQ callback
00065 void dmaERRCallback(void)
00066 {
00067     printf("Oh no! My Mbed exploded! :( Only kidding, find the problem");
00068 }
00069 
00070 // Configuration callback on TC
00071 void TC0_callback(void)
00072 {
00073     MODDMA_Config*  config = dma.getConfig();
00074 
00075     dma.haltAndWaitChannelComplete((MODDMA::CHANNELS) config->channelNum());
00076     dma.Disable((MODDMA::CHANNELS) config->channelNum());
00077 
00078     // Configurations have two IRQ callbacks for TC and Err so you
00079     // know which you are processing. However, if you want to use
00080     // a single callback function you can tell what type of IRQ
00081     // is being processed thus:-
00082     if (dma.irqType() == MODDMA::TcIrq) {
00083         led3 = 1;
00084         dma.clearTcIrq();
00085     }
00086 
00087     if (dma.irqType() == MODDMA::ErrIrq) {
00088         led4 = 1;
00089         dma.clearErrIrq();
00090     }
00091 }
00092 
00093 // Configuration cakllback on Error
00094 void ERR0_callback(void)
00095 {
00096     printf("Oh no! My Mbed exploded! :( Only kidding, find the problem");
00097 }