Test
example1.h
- Committer:
- ktseng
- Date:
- 2019-04-25
- Revision:
- 18:e7d62a489a83
- Parent:
- 12:1dfee7208043
File content as of revision 18:e7d62a489a83:
#include "mbed.h" #include "MODDMA.h" #include "MODSERIAL.h" DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); DigitalOut led4(LED4); MODDMA dma; MODSERIAL pc(USBTX, USBRX); // Function prototypes for IRQ callbacks. // See definitions following main() below. void dmaTCCallback(void); void dmaERRCallback(void); void TC0_callback(void); void ERR0_callback(void); int main() { char s[] = "**DMA** ABCDEFGHIJKLMNOPQRSTUVWXYZ **DMA**"; pc.baud(PC_BAUD); dma.attach_tc( &dmaTCCallback ); dma.attach_err( &dmaERRCallback ); MODDMA_Config *config = new MODDMA_Config; config ->channelNum ( MODDMA::Channel_0 ) ->srcMemAddr ( (uint32_t) &s ) ->dstMemAddr ( 0 ) ->transferSize ( sizeof(s) ) ->transferType ( MODDMA::m2p ) ->transferWidth ( 0 ) ->srcConn ( 0 ) ->dstConn ( MODDMA::UART0_Tx ) ->dmaLLI ( 0 ) ->attach_tc ( &TC0_callback ) ->attach_err ( &ERR0_callback ) ; // config end // Setup the configuration. dma.Setup(config); //dma.Enable( MODDMA::Channel_0 ); //dma.Enable( config->channelNum() ); dma.Enable( config ); while (1) { led1 = !led1; wait(0.25); } } // Main controller TC IRQ callback void dmaTCCallback(void) { led2 = 1; } // Main controller ERR IRQ callback void dmaERRCallback(void) { error("Oh no! My Mbed exploded! :( Only kidding, find the problem"); } // Configuration callback on TC void TC0_callback(void) { MODDMA_Config *config = dma.getConfig(); dma.haltAndWaitChannelComplete( (MODDMA::CHANNELS)config->channelNum()); dma.Disable( (MODDMA::CHANNELS)config->channelNum() ); // Configurations have two IRQ callbacks for TC and Err so you // know which you are processing. However, if you want to use // a single callback function you can tell what type of IRQ // is being processed thus:- if (dma.irqType() == MODDMA::TcIrq) { led3 = 1; dma.clearTcIrq(); } if (dma.irqType() == MODDMA::ErrIrq) { led4 = 1; dma.clearErrIrq(); } } // Configuration cakllback on Error void ERR0_callback(void) { error("Oh no! My Mbed exploded! :( Only kidding, find the problem"); }