#include "./SYSTEM/sys/sys.h" #include "./SYSTEM/usart/usart.h" #include "./SYSTEM/delay/delay.h" #include "./BSP/LED/led.h" #include "./BSP/BEEP/beep.h" #include "./BSP/KEY/key.h" int main(void) { uint8_t key; int q; int w; int e; int r; HAL_Init(); sys_stm32_clock_init(336, 8, 2, 7); delay_init(168); led_init(); beep_init(); key_init(); LED0(0); while(1) { key = key_scan(0); if (key) { switch (key) { case WKUP_PRES: for(q=0;q<1000;q++) { LED0(0); LED1(1); delay_ms(100); LED0(1); LED1(0); delay_ms(100); if(KEY0==0||KEY1==0||KEY2==0)break; } break; case KEY0_PRES: for(e=0;e<1000;e++) { BEEP(0); delay_ms(100); BEEP(1); delay_ms(100); if(WK_UP==1||KEY1==0||KEY2==0)break; } break; case KEY1_PRES: for(w=0;w<1000;w++) { LED0(0); LED1(1); delay_ms(500); LED0(1); LED1(0); delay_ms(500); if(KEY0==0||WK_UP==1||KEY2==0)break; } break; case KEY2_PRES: for(r=0;r<1000;r++) { BEEP(0); delay_ms(1000); BEEP(1); delay_ms(1000); if(WK_UP==1||KEY1==0||KEY0==0)break; } break; default : break; } } else { delay_ms(10); } } }按键让led和蜂鸣器频率递增或递减
时间: 2023-06-25 20:08:08 浏览: 243
可以通过增加一个变量来记录LED和蜂鸣器的频率,然后在按键按下时增加或减少这个变量的值,再根据这个变量的值来控制LED和蜂鸣器的闪烁和鸣叫频率。以下是一个示例代码:
```
#include "./SYSTEM/sys/sys.h"
#include "./SYSTEM/usart/usart.h"
#include "./SYSTEM/delay/delay.h"
#include "./BSP/LED/led.h"
#include "./BSP/BEEP/beep.h"
#include "./BSP/KEY/key.h"
int main(void)
{
uint8_t key;
int q, w, e, r;
int led_freq = 500; // LED闪烁频率(单位:ms)
int beep_freq = 1000; // 蜂鸣频率(单位:ms)
HAL_Init();
sys_stm32_clock_init(336, 8, 2, 7);
delay_init(168);
led_init();
beep_init();
key_init();
LED0(0);
while(1)
{
key = key_scan(0);
if (key)
{
switch (key)
{
case WKUP_PRES:
for(q=0;q<1000;q++)
{
LED0(0);
LED1(1);
delay_ms(led_freq);
LED0(1);
LED1(0);
delay_ms(led_freq);
if(KEY0==0||KEY1==0||KEY2==0) break;
}
break;
case KEY0_PRES:
for(e=0;e<1000;e++)
{
BEEP(0);
delay_ms(beep_freq);
BEEP(1);
delay_ms(beep_freq);
if(WK_UP==1||KEY1==0||KEY2==0) break;
}
break;
case KEY1_PRES:
for(w=0;w<1000;w++)
{
LED0(0);
LED1(1);
delay_ms(led_freq/2);
LED0(1);
LED1(0);
delay_ms(led_freq/2);
if(KEY0==0||WK_UP==1||KEY2==0) break;
}
break;
case KEY2_PRES:
for(r=0;r<1000;r++)
{
BEEP(0);
delay_ms(beep_freq*2);
BEEP(1);
delay_ms(beep_freq*2);
if(WK_UP==1||KEY1==0||KEY0==0) break;
}
break;
case KEY0_HOLD:
led_freq += 100;
beep_freq += 200;
break;
case KEY1_HOLD:
led_freq -= 100;
beep_freq -= 200;
if (led_freq < 100) led_freq = 100;
if (beep_freq < 200) beep_freq = 200;
break;
default:
break;
}
}
else
{
delay_ms(10);
}
}
}
```
在代码中,我们增加了两个变量 `led_freq` 和 `beep_freq` 来分别记录LED和蜂鸣器的频率,初始值分别为500ms和1000ms。在按键处理中,我们增加了两个按键处理分支,分别处理KEY0_HOLD和KEY1_HOLD事件,当按下KEY0_HOLD时,增加LED和蜂鸣器的频率,当按下KEY1_HOLD时,减少LED和蜂鸣器的频率,同时限制最小值为100ms和200ms,防止频率过低导致闪烁和鸣叫不明显。
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