EEPW论坛

问 谁知道怎么控制LED的渐变啊?小第在这里先感谢了. 答 1: 好多ARM的芯片都有PWM也,你就用他吧.哈哈.


你是想做类配吧.



答 2: 多找，多看，多试有好处。
#include <CommonType.h>

void Delay(DWORD dw)
{
    while (dw-- > 0)
        ;
}

void PWM_Output(INT8U nDiv)
{
    CMOD = 0x02;
    CL = 0x00;
    CH = 0x00;
    CCAP0L = nDiv;
    CCAP0H = nDiv;
    PCA_PWM0 = 0x00;
    CCAPM0 = 0x42;
    CR = 1;
}

void main(void)
{
    WORD wI=0;
    WORD wJ = 0;
    INT8U nI = 0;

    while (1)
    {
        for (nI=0xff; nI>0x00;nI--)
        {
            PWM_Output(nI);
            Delay(0xfff);
        }
    }
} 答 3: :)打波形嘛..波形周期长led就暗,波形周期短led就亮啦.通俗易懂吧