[参考译文] MSPM0G3507：关于 GPIO 读取引脚

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https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1443421/mspm0g3507-regarding-gpio-read-pin

器件型号：MSPM0G3507

工具与软件：

尊敬的 TI：

我曾尝试读取配置为输入的 GPIO PA25引脚、但我可以看到、当我提供3.3V 时、我将获得寄存器十进制值、而不是高电平或低电平。

我的问题是、为什么要把引脚值设置为高电平或低电平、而不是高电平或低电平。

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/** * @brief Set a group of GPIO pins * * @param[in] gpio Pointer to the register overlay for the peripheral * @param[in] pins Pins to set high. Bitwise OR of @ref DL_GPIO_PIN. */ 
__STATIC_INLINE void DL_GPIO_setPins(GPIO_Regs* gpio, uint32_t pins) 
{
   gpio->DOUTSET31_0 = pins;
}
__STATIC_INLINE uint32_t DL_GPIO_readPins(GPIO_Regs* gpio, uint32_t pins)
{
    return (gpio->DIN31_0 & pins);
}
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/** * @brief Set a group of GPIO pins * * @param[in] gpio Pointer to the register overlay for the peripheral * @param[in] pins Pins to set high. Bitwise OR of @ref DL_GPIO_PIN. */ 

__STATIC_INLINE void DL_GPIO_setPins(GPIO_Regs* gpio, uint32_t pins) 
{
   gpio->DOUTSET31_0 = pins;
}

__STATIC_INLINE uint32_t DL_GPIO_readPins(GPIO_Regs* gpio, uint32_t pins)
{
    return (gpio->DIN31_0 & pins);
}