Blackfin DSP(八)：BF533的DMA

 

 

#include <cdefBF533.h>
#include <sys\exception.h>

#define POLC  0x00004000
#define PORT_CFG_2_3_EXT_FS 0x00000020 
#define XFR_TYPE_NON_ITU656 0x0000000C
#define SLEN_32    0x001f
#define FLOW_1    0x1000

unsigned char iTxBuffer[4000];
unsigned char iRxBuffer[4000];

EX_INTERRUPT_HANDLER(Sport0_RX_ISR);
EX_INTERRUPT_HANDLER(Sport0_TX_ISR);

void Init_Sport1_TX(int TCLKDIV,int TFSDIV)
{

    *pSPORT0_TCLKDIV    =    TCLKDIV;
    *pSPORT0_TFSDIV        =    TFSDIV;        
    *pSPORT0_TCR1        =    ITFS|TFSR|ITCLK;
    *pSPORT0_TCR2        =    31;
}

void Init_Sport1_RX(int RCLKDIV,int RFSDIV)
{

    *pSPORT0_RCLKDIV    =    RCLKDIV;
    *pSPORT0_RFSDIV        =    RFSDIV;        
    *pSPORT0_RCR1        =    IRFS|RFSR|IRCLK;
    *pSPORT0_RCR2        =    31;
}
    

void Init_DMA(void)
{
    *pDMA1_PERIPHERAL_MAP = 0x1000;
    *pDMA1_CONFIG = WNR | WDSIZE_32 | DI_EN | FLOW_1;
    *pDMA1_START_ADDR = (void *)iRxBuffer;
    *pDMA1_X_COUNT = 1000;
    *pDMA1_X_MODIFY = 4;
    
    *pDMA2_PERIPHERAL_MAP = 0x2000;
    *pDMA2_CONFIG = WDSIZE_32 | DI_EN |FLOW_1;
    *pDMA2_START_ADDR = (void *)iTxBuffer;
    *pDMA2_X_COUNT = 1000;
    *pDMA2_X_MODIFY = 4;
}

void Enable_DMA_Sport0_TX(void)
{
    *pDMA2_CONFIG    = (*pDMA2_CONFIG | DMAEN);    
    *pSPORT0_TCR1     = (*pSPORT0_TCR1 | TSPEN);
}

void Enable_DMA_Sport0_RX(void)
{
    *pDMA1_CONFIG    = (*pDMA1_CONFIG | DMAEN);
    *pSPORT0_RCR1     = (*pSPORT0_RCR1 | RSPEN);;
}

void Init_Interrupts(void)
{
    *pSIC_IAR0 = 0xffffffff;
    *pSIC_IAR1 = 0xfffff32f;
    *pSIC_IAR2 = 0xffffffff;

    register_handler(ik_ivg9, Sport0_RX_ISR);
    register_handler(ik_ivg10, Sport0_TX_ISR);
    
    *pSIC_IMASK = 0x00000600;
    
}


EX_INTERRUPT_HANDLER(Sport0_RX_ISR)
{
    *pDMA1_IRQ_STATUS = 0x0001;
    
    printf("SPORT RX DMA Done!\n");
    
    *pSIC_IMASK &= ~0x00000200;

}

EX_INTERRUPT_HANDLER(Sport0_TX_ISR)
{
    *pDMA2_IRQ_STATUS = 0x0001;

    printf("SPORT TX DMA Done!\n");
    
    *pSIC_IMASK &= ~0x00000400;
}

main()
{
    int i;
    Set_PLL(16,3);
    Init_EBIU();
    Init_SDRAM();
    
    for(i=0;i<4000;i++)
        iTxBuffer[i]=i;
    
    
    Init_Sport1_TX(7,9);    
    Init_Sport1_RX(7,9);
    Init_Interrupts();
    Init_DMA();        
    Enable_DMA_Sport0_TX();
    Enable_DMA_Sport0_RX();
    while(1);
}