【雅特力AT32WB415系列蓝牙BLE 5.0 MCU】红外检测
<div class='showpostmsg'> 本帖最后由 常见泽1 于 2022-9-1 15:05 编辑<p><span style="font-family:Times;"><span style="font-size:16px;">雅特力AT32WB415外部中断（EXINT）与NVIC直接连接， EXINT包含23个边沿检测器，用于产生中断请求。每个中断线都可以独立地配置它的触发事件（上升沿、下降沿、或双边沿），</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">并能够单独地被屏蔽；挂起寄存器维持所有中断请求的状态。外部中断其中最多有16根可从GPIO中选择连接。</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;">人体感应模块</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">在通过放大器是BISS0001将脉冲信号转化为更直观的高低电平输出，有人输出高，无人输出低。并在放大电路上设置电位器，调节输出信号的灵敏度，调节高电平持续时间。</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;"> </span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;">模块接口只有三个脚，地、电源、数据线；分别计为GND、VCC、OUT</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">探头检测到有人移动时，OUT=1；没人移动时，OUT=0；</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">因此我们可以把它当成一个独立按键，按下时（有人移动）为1，松开时（没人移动）为0。</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;"> </span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;">这个模块是5V供电，又找了个板子供上了5V电源</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;">很简单就是一个外部中断，</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;">void exint_line0_config(void)</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">{</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init_type exint_init_struct;</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;"> crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;"> gpio_exint_line_config(GPIO_PORT_SOURCE_GPIOA, GPIO_PINS_SOURCE8);</span></span></p>
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<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_default_para_init(&exint_init_struct);</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init_struct.line_enable = TRUE;</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init_struct.line_mode = EXINT_LINE_INTERRUPUT;</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init_struct.line_select = EXINT_LINE_8;</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init_struct.line_polarity = EXINT_TRIGGER_RISING_EDGE;</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> exint_init(&exint_init_struct);</span></span></p>
<p> </p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;"> nvic_irq_enable(EXINT9_5_IRQn, 1, 0);</span></span></p>
<p><span style="font-family:Times;"><span style="font-size:16px;">}</span></span></p>
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秦天qintian0303 发表于 2022-9-1 08:43
注意IO口的耐压啊
<p>对 要接FT端口</p>
<p>这传感器是什么接口？是I2C吗</p>
bigbat 发表于 2022-9-1 22:48
这传感器是什么接口？是I2C吗
<p>就是IO口 类似按键产生高低电平而已</p>
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