【国民技术N32项目移植】智能温湿度监测系统项目移植: 6 GPIO 使用说明( UG_N32G45XVL-STB开发板 )

源代码和开发文档地址：
https://gitee.com/mftang/n32-g45-xvl-stb.git

6.1 需求

配置GPIO 控制UG_N32G45XVL-STB开发板 上的3个LED指示灯

6.2 硬件分析

UG_N32G45XVL-STB开发板 上的3个LED和MCU 对应IO如下， 当IO为高电平时，点亮LED

6.3 软件实现

6.3.1 IO 参数配置接口

// io 初始化接口
void gpio_Init(GPIO_Module* GPIOx, uint16_t Pin)
{
    GPIO_InitType GPIO_InitStructure;
​
    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
​
    /* Enable the GPIO Clock */
    if (GPIOx == GPIOA)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA, ENABLE);
    }
    else if (GPIOx == GPIOB)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOB, ENABLE);
    }
    else if (GPIOx == GPIOC)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOC, ENABLE);
    }
    else if (GPIOx == GPIOD)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOD, ENABLE);
    }
    else if (GPIOx == GPIOE)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOE, ENABLE);
    }
    else if (GPIOx == GPIOF)
    {
        RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOF, ENABLE);
    }
    else
    {
        if (GPIOx == GPIOG)
        {
            RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOG, ENABLE);
        }
    }
​
    /* Configure the GPIO pin */
    if (Pin <= GPIO_PIN_ALL)
    {
        GPIO_InitStructure.Pin        = Pin;
        GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Out_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitPeripheral(GPIOx, &GPIO_InitStructure);
    }
}
​

6.3.2 LED控制接口

/**
 * @brief  Turns selected Led on.
 * @param GPIOx x can be A to G to select the GPIO port.
 * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15.
 */
void LedOn(GPIO_Module* GPIOx, uint16_t Pin)
{
    GPIOx->PBSC = Pin;
}
/**
 * @brief  Turns selected Led Off.
 * @param GPIOx x can be A to G to select the GPIO port.
 * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15.
 */
void LedOff(GPIO_Module* GPIOx, uint16_t Pin)
{
    GPIOx->PBC = Pin;
}
/**
 * @brief  Turns selected Led on or off.
 * @param GPIOx x can be A to G to select the GPIO port.
 * @param Pin This parameter can be one of the following values:
 *  @arg GPIO_PIN_0~GPIO_PIN_15: set related pin on
 *  @arg (GPIO_PIN_0<<16)~(GPIO_PIN_15<<16): clear related pin off
 */
void LedOnOff(GPIO_Module* GPIOx, uint32_t Pin)
{
    GPIOx->PBSC = Pin;
}
/**
 * @brief  Toggles the selected Led.
 * @param GPIOx x can be A to G to select the GPIO port.
 * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15.
 */
void LedBlink(GPIO_Module* GPIOx, uint16_t Pin)
{
    GPIOx->POD ^= Pin;
}
​

6.3.3 测试代码

初始化代码

/*******************************************************************************
 Board LED IO
*******************************************************************************/
#define  GPIO_LED1                GPIOA
//#define  GPIO_LED2                GPIOB
#define  GPIO_LED3                GPIOB
​
#define  PIN_LED1                 GPIO_PIN_8
//#define  PIN_LED2                 GPIO_PIN_4
#define  PIN_LED3                 GPIO_PIN_5
​
#define  RCC_LED1_GPIO_CLK       RCC_APB2_PERIPH_GPIOA
#define  RCC_LED3_GPIO_CLK       RCC_APB2_PERIPH_GPIOB
​
static void Board_GPIO_Configuration(void)
{ 
    /* initial LED gpio port */
    gpio_Init( GPIO_LED1, PIN_LED1);
    gpio_Init( GPIO_LED3, PIN_LED3);
    
    // all led on
    LedOn( GPIO_LED1, PIN_LED1);
    LedOn( GPIO_LED3, PIN_LED3);
}
​
​
​

在定时器中实现LED控制 ，1 hz 闪烁频率

static int count;
void TIM1_UP_IRQHandler(void)
{
    if (TIM_GetIntStatus(TIM1, TIM_INT_UPDATE) != RESET)
    {
        TIM_ClrIntPendingBit(TIM1, TIM_INT_UPDATE);
        if( (count % 1000 ) == 0 )
        {
           LedBlink(GPIO_LED3, PIN_LED3);
        }
         count ++;  
    }
}
​