CH32V103 gpio 範例

CH32V103的GPIO示例可以参考以下代码：

#include "ch32v103.h"

void GPIO_Init(void) {
    // 使能GPIOA和GPIOB的时钟
    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN;
    
    // 配置PA4、PA5、PA6、PA7为复用功能
    GPIOA->CRL &= ~(GPIO_CRL_MODE4 | GPIO_CRL_MODE5 | GPIO_CRL_MODE6 | GPIO_CRL_MODE7);
    GPIOA->CRL |= GPIO_CRL_CNF4_1 | GPIO_CRL_CNF5_1 | GPIO_CRL_CNF6_1 | GPIO_CRL_CNF7_1;
    
    // 配置PB13、PB14、PB15为复用功能
    GPIOB->CRH &= ~(GPIO_CRH_MODE13 | GPIO_CRH_MODE14 | GPIO_CRH_MODE15);
    GPIOB->CRH |= GPIO_CRH_CNF13_1 | GPIO_CRH_CNF14_1 | GPIO_CRH_CNF15_1;
}

这段代码初始化了CH32V103的GPIO功能。其中，PA4、PA5、PA6、PA7被配置为复用功能，而PB13、PB14、PB15也被配置为复用功能。这样，你就可以使用这些引脚进行SPI通信了。
#### 引用[.reference_title]
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