新手学习跑马灯，红绿灯缓慢变亮或缓慢变暗。

aiwl123

1.红灯由熄灭到最亮，绿灯由最亮到熄灭；2.红灯由最亮到熄灭，绿灯由熄灭到最亮。循环第一和第二步。

[mw_shl_code=c,true]#include "stm32f10x.h" #include "led.h" #include "sys.h" #include "delay.h" [/mw_shl_code] [mw_shl_code=c,true]void LED_Starry(void) {     u8 i,j;     for(j = 0;j <= 20;j++)     {         for(i = 0;i < 5;i++)         {             if(j == 0)             {                 LED0 = 1;                 LED1 = 0;             }             else if(j == 20)             {                 LED0 = 0;                 LED1 = 1;             }             else             {                 LED0 = 0;                 LED1 = 1;                 delay_ms(j);                 LED0 = 1;                 LED1 = 0;                 delay_ms(20 - j);              }         }     }     delay_ms(500);     for(j = 1;j < 20;j++)     {         for(i = 0;i < 5;i++)         {             if(j == 0)             {                 LED0 = 0;                 LED1 = 1;             }             else if(j == 20)             {                 LED0 = 1;                 LED1 = 0;             }             else             {                 LED0 = 0;                 LED1 = 1;                 delay_ms(20 - j);                 LED0 = 1;                 LED1 = 0;                 delay_ms(j);             }         }     }     delay_ms(500);     LED0 = ~LED0; LED1 = ~LED1; delay_ms(300); LED0 = ~LED0; LED1 = ~LED1; delay_ms(300); } int main(void) { delay_init(); LED_Init(); while(1) {[/mw_shl_code] [mw_shl_code=c,true]            LED_Starry(); [/mw_shl_code] [mw_shl_code=c,true]        } } [/mw_shl_code]

正点原子

谢谢分享....

w0rmis20

以后你就会用硬件PWM了 那个调亮度才爽

jermy_z

用这么多循环  不蛋疼啊，直接上PWM。。。

aiwl123

回复【4楼】jermy_z:
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哥，现在才学到按键，PWM还没学到呢。。

平常心kxy

可以用软件模拟pwm控制io占空比的输出。你这程序有点笨。

aiwl123

回复【6楼】平常心kxy:
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那肯定的，光延时就有那么多，浪费资源，这个只是实验而已。