【BLE 5.3无线MCU CH582】6、pwm呼吸灯
<p>系列文章：</p><p><a href="https://bbs.eeworld.com.cn/thread-1195192-1-1.html" target="_blank">【BLE 5.3无线MCU CH582】1、初识CH582开发板（开箱）</a></p>
<p><a href="https://bbs.eeworld.com.cn/thread-1195464-1-1.html" target="_blank">【BLE 5.3无线MCU CH582】2、MounRiver IDE初体验</a></p>
<p><a href="https://bbs.eeworld.com.cn/thread-1196099-1-1.html#pid3126477" target="_blank">【BLE 5.3无线MCU CH582】3、非阻塞方式点灯</a></p>
<p><a href="https://bbs.eeworld.com.cn/thread-1196188-1-1.html" target="_blank">【BLE 5.3无线MCU CH582】4、串口不定长数据接收</a></p>
<p><a href="https://bbs.eeworld.com.cn/thread-1196777-1-1.html" target="_blank">【BLE 5.3无线MCU CH582】5、硬件I2C驱动0.96吋OLED</a></p>
<p> </p>
<p><span style="font-size:20px;">1、关于CH582的PWM</span></p>
<p><span style="font-size:16px;">CH582除了定时器可以产生pwm之外，还提供了专门的pwm外设，独立于定时器。</span></p>
<p></p>
<p><span style="font-size:24px;">2、PWM通道</span></p>
<p><span style="font-size:16px;">引脚信息上标有PWMX的即就是pwm通道，从<span style="font-family:黑体"><span style="color:#000000">PWM4到PWM11，PWM0到PWM3是定时器的pwm通道。</span></span></span></p>
<p> </p>
<p><span style="font-size:24px;">3、代码实现</span></p>
<pre>
<code class="language-cpp">void PwmInit(void)
{
GPIOA_ModeCfg( GPIO_Pin_12, GPIO_ModeOut_PP_5mA ); // PA12 - PWM4
GPIOA_ModeCfg( GPIO_Pin_13, GPIO_ModeOut_PP_5mA ); // PA13 - PWM5
PWMX_CLKCfg( 2 ); // cycle = Fsys/2
PWMX_CycleCfg( PWMX_Cycle_31 ); // 周期 = cycle/31
PWMX_ACTOUT( CH_PWM4, (UINT8)((31/100.0 )* 10), High_Level, ENABLE );
PWMX_ACTOUT( CH_PWM5, (UINT8)((31/100.0 )* 10), High_Level, ENABLE );
}
void PwmOut(void)
{
static uint32_t tick=0;
staticuint8_t out=0;
if(SystemGetTick()-tick>100)
{
tick=SystemGetTick();
out=out+5;
if(out>100)
{
out=0;
}
PWMX_ACTOUT( CH_PWM4, (UINT8)((31/100.0 )* out), High_Level, ENABLE );
PWMX_ACTOUT( CH_PWM5, (UINT8)((31/100.0 )* out), High_Level, ENABLE );
}
}
</code></pre>
<p><span style="font-size:24px;">4、现象</span></p>
<p> </p>
<p> </p>
<p> </p>
<p>搞测试的表示一头雾水</p>
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