c - blackfin bf537 LED 闪烁

Question

下面的代码是blackfin bf537的LED闪烁程序示例LED 将从右向左闪烁并切换回来。/**/

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;  

/**/

现在我正在尝试修改代码来完成新功能，我希望当我按下按钮时它从左到右闪烁一次，所以我的代码如下:/**/

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; 

/**/

现在它无法工作或只是闪烁 LED3，我该如何修复它？

谢谢

Answer 1

经过几天的思考，这是我的答案:

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;  
    }

然后将 PORTFIO 设置为从 PF2 到 PF5(SW13~SW10) 的按钮每个按钮对应每种模式，因此我们可以看到模式1是LED从左到右闪烁。模式 2 从右向左闪烁。模式 3 使 LED 2、4 和 6 闪烁。