1 #include "key1.h"2 //封裝EXTI章節函數3 void hal_exti_init(int exti,unsigned int i)4 {5     switch(exti)6     {7     case 9:8         //使能GPIOF外設時鐘9         RCC->MP_AHB4ENSETR |= (0x1<<5);10         //將PF9設置為輸出模式11         GPIOF->MODER &= (~(0x3<<(exti*2)));12 13         //選擇PF9產生EXTI9事件                                                                    14         EXTI->EXTICR3 &= (~(0xff<<(exti%4)*8));15         EXTI->EXTICR3 |= (i<<(exti%4)*8);16         //設置下降沿檢測EXTI9事件17         EXTI->FTSR1 |= (0x1<<exti);18         //取消EXTI9事件中斷屏蔽19         EXTI->C1IMR1 |= (0x1<<exti);20         break;21     case 7:22         //使能GPIOF外設時鐘23         RCC->MP_AHB4ENSETR |= (0x1<<5);24         //將PF9設置為輸出模式25         GPIOF->MODER &= (~(0x3<<(exti*2)));26 27         //選擇PF9產生EXTI9事件                                                                    28         EXTI->EXTICR2 &= (~(0xff<<(exti%4)*8));29         EXTI->EXTICR2 |= (i<<(exti%4)*8);30         //設置下降沿檢測EXTI9事件31         EXTI->FTSR1 |= (0x1<<exti);32         //取消EXTI9事件中斷屏蔽33         EXTI->C1IMR1 |= (0x1<<exti);34         break;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         35     case 8:36         //使能GPIOF外設時鐘37         RCC->MP_AHB4ENSETR |= (0x1<<5);38         //將PF9設置為輸出模式39         GPIOF->MODER &= (~(0x3<<(exti*2)));40 41         //選擇PF9產生EXTI9事件                                                                    42         EXTI->EXTICR3 &= (~(0xff<<(exti%4)*8));43         EXTI->EXTICR3 |= (i<<(exti%4)*8);44         //設置下降沿檢測EXTI9事件45         EXTI->FTSR1 |= (0x1<<exti);46         //取消EXTI9事件中斷屏蔽47         EXTI->C1IMR1 |= (0x1<<exti);48         break;49     }50 }51 52 //封裝GIC章節函數53 void hal_gic_init(int uart_num,unsigned int i)54 {55     //使能99號中斷56     GICD->ISENABLER[uart_num/32] |= (0x1<<(uart_num%32));57     //設置99號中斷優先級58     GICD->IPRIORITYR[uart_num/4] &= (~(i<<(uart_num%4*8+3)));59     //設置99號的中斷目標處理器60     GICD->ITARGETSR[uart_num/4] &= (~(0x3<<(uart_num%4*8)));61     GICD->ITARGETSR[uart_num/4] |= (0x1<<(uart_num%4*8));62 63     //全局使能組0中斷被轉發到GICC層64     GICD->CTRL |= 0x1;65     //設置中斷的優先級掩碼66     GICC->PMR |= (0x1f<<3);67     //全局使能組0中斷被轉發到處理器68     GICC->CTRL |= 0x1;69 }
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