1 #include "key1.h"2 //封装EXTI章节函数3 void hal_exti_init(int exti,unsigned int i)4 {5     switch(exti)6     {7     case 9:8         //使能GPIOF外设时钟9         RCC->MP_AHB4ENSETR |= (0x1<<5);10         //将PF9设置为输出模式11         GPIOF->MODER &= (~(0x3<<(exti*2)));12 13         //选择PF9产生EXTI9事件                                                                    14         EXTI->EXTICR3 &= (~(0xff<<(exti%4)*8));15         EXTI->EXTICR3 |= (i<<(exti%4)*8);16         //设置下降沿检测EXTI9事件17         EXTI->FTSR1 |= (0x1<<exti);18         //取消EXTI9事件中断屏蔽19         EXTI->C1IMR1 |= (0x1<<exti);20         break;21     case 7:22         //使能GPIOF外设时钟23         RCC->MP_AHB4ENSETR |= (0x1<<5);24         //将PF9设置为输出模式25         GPIOF->MODER &= (~(0x3<<(exti*2)));26 27         //选择PF9产生EXTI9事件                                                                    28         EXTI->EXTICR2 &= (~(0xff<<(exti%4)*8));29         EXTI->EXTICR2 |= (i<<(exti%4)*8);30         //设置下降沿检测EXTI9事件31         EXTI->FTSR1 |= (0x1<<exti);32         //取消EXTI9事件中断屏蔽33         EXTI->C1IMR1 |= (0x1<<exti);34         break;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         35     case 8:36         //使能GPIOF外设时钟37         RCC->MP_AHB4ENSETR |= (0x1<<5);38         //将PF9设置为输出模式39         GPIOF->MODER &= (~(0x3<<(exti*2)));40 41         //选择PF9产生EXTI9事件                                                                    42         EXTI->EXTICR3 &= (~(0xff<<(exti%4)*8));43         EXTI->EXTICR3 |= (i<<(exti%4)*8);44         //设置下降沿检测EXTI9事件45         EXTI->FTSR1 |= (0x1<<exti);46         //取消EXTI9事件中断屏蔽47         EXTI->C1IMR1 |= (0x1<<exti);48         break;49     }50 }51 52 //封装GIC章节函数53 void hal_gic_init(int uart_num,unsigned int i)54 {55     //使能99号中断56     GICD->ISENABLER[uart_num/32] |= (0x1<<(uart_num%32));57     //设置99号中断优先级58     GICD->IPRIORITYR[uart_num/4] &= (~(i<<(uart_num%4*8+3)));59     //设置99号的中断目标处理器60     GICD->ITARGETSR[uart_num/4] &= (~(0x3<<(uart_num%4*8)));61     GICD->ITARGETSR[uart_num/4] |= (0x1<<(uart_num%4*8));62 63     //全局使能组0中断被转发到GICC层64     GICD->CTRL |= 0x1;65     //设置中断的优先级掩码66     GICC->PMR |= (0x1f<<3);67     //全局使能组0中断被转发到处理器68     GICC->CTRL |= 0x1;69 }
~