stm32的普通io脚怎样采集adc0809芯片的信号 对于STM32 IO口来说，多大范围的电压算是高电平？多大范...

\u4f60\u597d\uff0c\u6211\u73b0\u5728\u8981\u8bbe\u8ba1\u4e00\u4e2a\u6a21\u62df\u4fe1\u53f7\u91c7\u96c6\u7684\u7535\u8def\uff0c\u82af\u7247\u9009\u7528STM32\u5185\u90e8\u8bbe\u6709ADC\u3002\u8981\u91c7\u96c60\u52305V\u7684\u7535\u538b\u548c4\u523020mA\u7535\u6d41

\u53ea\u80fd\u7b80\u5355\u8bf4\u8bf4\uff0c\u627e\u5230stm32\u7684\u6570\u636e\u624b\u518c\uff0c\u6309\u5178\u578b\u63a5\u6cd5\u63a5\u51fa\u7535\u8def\uff0c\u91c7\u7535\u538b\u76f4\u63a5\u628a\u7535\u538b\u63a5\u5230 AD\u8f93\u5165\u4e0a\uff0c\u91c7\u7535\u6d41\u5c31\u5f97\u5148\u4e32\u8054\u4e00\u4e2a\u7535\u963b\uff0c\u628a\u7535\u6d41\u4fe1\u53f7\u8f6c\u5316\u4e3a\u7535\u538b\u4fe1\u53f7

1\u3001STM32\u5f15\u811a\u8f93\u5165\u7535\u5e73\u7684\u8303\u56f4\u662fALVC\uff0c \u8f93\u5165\u5c0f\u4e8e0\uff0c\u8f93\u5165\u5927\u4e8e2V\u7b97\u9ad8\u7535\u5e73\uff0cLV \u3001ALVT\u4e2d 8V\u7b97\u4f4e\u7535\u5e73\u3002
2\u3001 5V CMOS\u3001 HC\u3001 AHC\u3001 AC\u4e2d\uff0c \u8f93\u5165\u5927\u4e8e3.5V\u7b97\u9ad8\u7535\u5e73 | | \u8f93\u5165\u5c0f\u4e8e1.5V\u7b97\u4f4e\u7535\u5e73\uff1b
3\u3001 5V TTL \u3001ABT \u3001AHCT\u3001 HCT\u3001 ACT\u4e2d \uff0c \u8f93\u5165\u5927\u4e8e2V\u7b97\u9ad8\u7535\u5e73 | | \u8f93\u5165\u5c0f\u4e8e0.8V\u7b97\u4f4e\u7535\u5e73\uff1b
4\u3001STM32\u7684IO\u7ba1\u811a\u6709\u4e24\u79cd\uff1aTTL\u548cCMOS\uff0c\u6240\u6709\u7ba1\u811a\u90fd\u517c\u5bb9TTL\u548cCMOS\u7535\u5e73\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4ece\u8f93\u5165\u8bc6\u522b\u7535\u538b\u4e0a\u770b\uff0c\u6240\u6709\u7ba1\u811a(\u4e0d\u7ba1\u662fTTL\u7ba1\u811a\u8fd8\u662fCMOS\u7ba1\u811a)\u90fd\u53ef\u4ee5\u8bc6\u522bTTL\u6216CMOS\u7535\u5e73\u3002\u4e0b\u9762\u662f\u6458\u81eaSTM32\u6570\u636e\u624b\u518c\u7684\u6709\u5173\u6570\u636e\uff1a

\u62d3\u5c55\u8d44\u6599
STM32\u7cfb\u5217\u57fa\u4e8e\u4e13\u4e3a\u8981\u6c42\u9ad8\u6027\u80fd\u3001\u4f4e\u6210\u672c\u3001\u4f4e\u529f\u8017\u7684\u5d4c\u5165\u5f0f\u5e94\u7528\u4e13\u95e8\u8bbe\u8ba1\u7684ARM Cortex®-M0\uff0cM0+\uff0cM3, M4\u548cM7\u5185\u6838\uff08ST's product portfolio contains a comprehensive range of microcontrollers, from robust, low-cost 8-bit MCUs up to 32-bit ARM-based Cortex®-M0 and M0+, Cortex®-M3, Cortex®-M4 Flash microcontrollers with a great choice of peripherals. ST has also extended this range to include an ultra-low-power MCU platform) \u3002\u6309\u5185\u6838\u67b6\u6784\u5206\u4e3a\u4e0d\u540c\u4ea7\u54c1\uff1a
\u4e3b\u6d41\u4ea7\u54c1\uff08STM32F0\u3001STM32F1\u3001STM32F3\uff09\u3001\u8d85\u4f4e\u529f\u8017\u4ea7\u54c1\uff08STM32L0\u3001STM32L1\u3001STM32L4\u3001STM32L4+\uff09\u3001\u9ad8\u6027\u80fd\u4ea7\u54c1\uff08STM32F2\u3001STM32F4\u3001STM32F7\u3001STM32H7\uff09
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1-STM32

你可以使用两种方法，一种是把普通管脚直接配置成简单的输入模式，基本就可以读到信号了，还有一种复杂点的就是用内部中断TIM进行中断捕捉，我感觉中断捕捉对信号的捕捉比较好

没用过，但是看了下资料，普通IO脚直接配置为输入然后和adc0809的out脚链接就可以，mcu控制ad通道的选择和数据的转换以及接受。8个引脚做并口输入。

普通引脚不行啊，必须找复用功能是AD转换的。

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