用keil5标准库写一个用两个按键组合分别控制4个led的灯亮如按键12关灯1亮，按键1关0开灯2亮

在Keil5环境中，我们通常使用CubeMX配置硬件，然后编写C代码来控制LED和按键。假设你已经有了对应的GPIO端口配置，我们可以创建一个简单的示例来实现这个功能。这里是一个简化的伪代码版本：

#include "stm32f1xx.h" // Include the Keil5 standard library for STM32F1 series

// Define your GPIO pins and LED variables
GPIO_TypeDef* ledGPIO = GPIOA; // Assuming LEDs are connected to GPIOA
GPIO_PinState led Pins[] = {GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_2, GPIO_PIN_3}; // LED1, LED2, LED3, LED4
GPIO_TypeDef* keyGPIO = GPIOB; // Assuming buttons are connected to GPIOB
GPIO_PinState keyPins[] = {GPIO_PIN_0, GPIO_PIN_1}; // Button1 and Button2

void ledControl(uint8_t ledIndex) {
    ledGPIO->ODR &= ~(1 << ledIndex); // Turn off the selected LED (set its bit to low)
}

void buttonHandler(uint8_t keyIndex) {
    if (!GPIO_ReadInputDataBit(keyGPIO, keyPins[keyIndex])) { // Key is pressed
        if (keyIndex == 0) { // Button1 press
            ledControl(0); // LED1 on
            ledControl(1); // LED2 off
        } else { // Button2 press
            ledControl(1); // LED1 off
            ledControl(2); // LED2 on
        }
    }
}

int main(void) {
    GPIO_Init(); // Initialize GPIOs for both LEDs and buttons
    
    while (1) {
        buttonHandler(GPIO_PinGetStatus(keyPins[0])); // Check Button1 status
        buttonHandler(GPIO_PinGetStatus(keyPins[1])); // Check Button2 status
    }

    return 0;
}