hc32l13x矩阵键盘4x5带数码管示例，每个按键控制一个led

以下是一个基于hc32l13x芯片的4x5矩阵键盘带数码管示例代码，每个按键都控制一个LED的亮灭。

首先，需要定义矩阵键盘的行列引脚和LED的引脚：

#define ROW1_PORT       GPIO_PORT_0
#define ROW1_PIN        GPIO_PIN_0
#define ROW2_PORT       GPIO_PORT_0
#define ROW2_PIN        GPIO_PIN_1
#define ROW3_PORT       GPIO_PORT_0
#define ROW3_PIN        GPIO_PIN_2
#define ROW4_PORT       GPIO_PORT_0
#define ROW4_PIN        GPIO_PIN_3

#define COL1_PORT       GPIO_PORT_0
#define COL1_PIN        GPIO_PIN_4
#define COL2_PORT       GPIO_PORT_0
#define COL2_PIN        GPIO_PIN_5
#define COL3_PORT       GPIO_PORT_0
#define COL3_PIN        GPIO_PIN_6
#define COL4_PORT       GPIO_PORT_0
#define COL4_PIN        GPIO_PIN_7
#define COL5_PORT       GPIO_PORT_1
#define COL5_PIN        GPIO_PIN_0

#define LED1_PORT       GPIO_PORT_1
#define LED1_PIN        GPIO_PIN_1
#define LED2_PORT       GPIO_PORT_1
#define LED2_PIN        GPIO_PIN_2
#define LED3_PORT       GPIO_PORT_1
#define LED3_PIN        GPIO_PIN_3
#define LED4_PORT       GPIO_PORT_1
#define LED4_PIN        GPIO_PIN_4
#define LED5_PORT       GPIO_PORT_1
#define LED5_PIN        GPIO_PIN_5

然后需要初始化这些引脚：

void GPIO_Init(void)
{
    en_gpio_port_t enGpioPort;
    stc_gpio_cfg_t stcGpioCfg;

    // 初始化行引脚
    enGpioPort = ROW1_PORT;
    stcGpioCfg.enDir = GpioDirIn;
    stcGpioCfg.enDrv = GpioDrvH;
    stcGpioCfg.enPuPd = GpioPu;
    stcGpioCfg.enOD = GpioOdDisable;
    GPIO_Init(enGpioPort, ROW1_PIN, &stcGpioCfg);

    enGpioPort = ROW2_PORT;
    GPIO_Init(enGpioPort, ROW2_PIN, &stcGpioCfg);

    enGpioPort = ROW3_PORT;
    GPIO_Init(enGpioPort, ROW3_PIN, &stcGpioCfg);

    enGpioPort = ROW4_PORT;
    GPIO_Init(enGpioPort, ROW4_PIN, &stcGpioCfg);

    // 初始化列引脚
    enGpioPort = COL1_PORT;
    stcGpioCfg.enDir = GpioDirOut;
    stcGpioCfg.enDrv = GpioDrvH;
    stcGpioCfg.enPuPd = GpioPu;
    stcGpioCfg.enOD = GpioOdDisable;
    GPIO_Init(enGpioPort, COL1_PIN, &stcGpioCfg);

    enGpioPort = COL2_PORT;
    GPIO_Init(enGpioPort, COL2_PIN, &stcGpioCfg);

    enGpioPort = COL3_PORT;
    GPIO_Init(enGpioPort, COL3_PIN, &stcGpioCfg);

    enGpioPort = COL4_PORT;
    GPIO_Init(enGpioPort, COL4_PIN, &stcGpioCfg);

    enGpioPort = COL5_PORT;
    GPIO_Init(enGpioPort, COL5_PIN, &stcGpioCfg);

    // 初始化LED引脚
    enGpioPort = LED1_PORT;
    stcGpioCfg.enDir = GpioDirOut;
    stcGpioCfg.enDrv = GpioDrvH;
    stcGpioCfg.enPuPd = GpioPu;
    stcGpioCfg.enOD = GpioOdDisable;
    GPIO_Init(enGpioPort, LED1_PIN, &stcGpioCfg);

    enGpioPort = LED2_PORT;
    GPIO_Init(enGpioPort, LED2_PIN, &stcGpioCfg);

    enGpioPort = LED3_PORT;
    GPIO_Init(enGpioPort, LED3_PIN, &stcGpioCfg);

    enGpioPort = LED4_PORT;
    GPIO_Init(enGpioPort, LED4_PIN, &stcGpioCfg);

    enGpioPort = LED5_PORT;
    GPIO_Init(enGpioPort, LED5_PIN, &stcGpioCfg);
}

接下来是扫描矩阵键盘和控制LED的代码：

void ScanKey(void)
{
    static uint8_t keyPrev = 0;

    // 首先将所有列引脚输出低电平
    GPIO_ResetPins(COL1_PORT, COL1_PIN);
    GPIO_ResetPins(COL2_PORT, COL2_PIN);
    GPIO_ResetPins(COL3_PORT, COL3_PIN);
    GPIO_ResetPins(COL4_PORT, COL4_PIN);
    GPIO_ResetPins(COL5_PORT, COL5_PIN);

    // 然后分别扫描每一行
    if (GPIO_ReadInputPortPin(ROW1_PORT, ROW1_PIN) == 0)
    {
        if (keyPrev != 1)
        {
            keyPrev = 1;
            GPIO_SetPins(LED1_PORT, LED1_PIN);
        }
    }
    else
    {
        GPIO_ResetPins(LED1_PORT, LED1_PIN);
    }

    if (GPIO_ReadInputPortPin(ROW2_PORT, ROW2_PIN) == 0)
    {
        if (keyPrev != 2)
        {
            keyPrev = 2;
            GPIO_SetPins(LED2_PORT, LED2_PIN);
        }
    }
    else
    {
        GPIO_ResetPins(LED2_PORT, LED2_PIN);
    }

    if (GPIO_ReadInputPortPin(ROW3_PORT, ROW3_PIN) == 0)
    {
        if (keyPrev != 3)
        {
            keyPrev = 3;
            GPIO_SetPins(LED3_PORT, LED3_PIN);
        }
    }
    else
    {
        GPIO_ResetPins(LED3_PORT, LED3_PIN);
    }

    if (GPIO_ReadInputPortPin(ROW4_PORT, ROW4_PIN) == 0)
    {
        if (keyPrev != 4)
        {
            keyPrev = 4;
            GPIO_SetPins(LED4_PORT, LED4_PIN);
        }
    }
    else
    {
        GPIO_ResetPins(LED4_PORT, LED4_PIN);
    }

    // 最后将当前行的引脚输出高电平，以便扫描下一行
    GPIO_SetPins(COL1_PORT, COL1_PIN);
    GPIO_SetPins(COL2_PORT, COL2_PIN);
    GPIO_SetPins(COL3_PORT, COL3_PIN);
    GPIO_SetPins(COL4_PORT, COL4_PIN);
    GPIO_SetPins(COL5_PORT, COL5_PIN);
}

在主函数中，只需要调用`GPIO_Init()`函数初始化引脚，并在循环中不断调用`ScanKey()`函数扫描矩阵键盘和控制LED即可。

int main(void)
{
    // 初始化GPIO引脚
    GPIO_Init();

    while (1)
    {
        ScanKey();
    }
}