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blackfin bf537 LED闪烁

blackfin signal-processing c

0

Harvey Chang · 技术社区 · 8 年前

以下代码是blackfin bf537的LED闪烁程序示例 LED将从右向左闪烁,并向后切换。 /**/

EX_INTERRUPT_HANDLER(Timer0_ISR)
{
// confirm interrupt handling
*pTIMER_STATUS = 0x0001;

// shift old LED pattern by one, left to right
if(sLight_Move_Direction)
{
    if((ucActive_LED = ucActive_LED >> 1) <= 0x0020) ucActive_LED = 0x1000;
}
else
{
    if((ucActive_LED = ucActive_LED << 1) == 0x0020) ucActive_LED = 0x0020;
}

// write new LED pattern to PORTF LEDs
*pPORTFIO_TOGGLE = ucActive_LED;

/**/

EX_INTERRUPT_HANDLER(Timer0_ISR)
{
// confirm interrupt handling
*pTIMER_STATUS = 0x0001;

// shift old LED pattern by one, left to right
if(sLight_Move_Direction){

    ucActive_LED == 0x0800;

    ucActive_LED = ucActive_LED >> 1;

    ucActive_LED == 0x0040; 
}

// write new LED pattern to PORTF LEDs  
*pPORTFIO_TOGGLE = ucActive_LED;

/**/

现在它无法工作或无法正常工作,我如何修复它?

谢谢

1 回复 | 直到 8 年前

1

0

Harvey Chang 8 年前

经过几天的思考,我的答案是:

int Mode;

EX_INTERRUPT_HANDLER(Timer0_ISR)
{
    // confirm interrupt handling
    *pTIMER_STATUS = 0x0001;

    if(Mode == 1)
    {
    if((ucActive_LED = ucActive_LED >> 1) <= 0x0020) 
        ucActive_LED = 0x1000;
    }
    else if(Mode == 2)
    {
     if((ucActive_LED = ucActive_LED << 1) >= 0x1000) 
     ucActive_LED = 0x0020;             
    }
    else if(Mode == 3)
    {
    if((ucActive_LED = ucActive_LED >> 2) <= 0x0020) 
        ucActive_LED = 0x1000;  
    }


    // write new LED pattern to PORTF LEDs  
    *pPORTFIO = ucActive_LED;  
    }