• ARM-day9作业

    main.c:

    1. #include "uart.h"
    2.  
    3. #include "key_it.h"
    4.  
    5.  
    6.  
    7. int main()
    8.  
    9. {
    10.  
    11. 	char c;
    12.  
    13. 	char *s;
    14.  
    15. 	uart4_init();    //串口初始化
    16.  
    17.  
    18.  
    19. 	//中断初始化
    20.  
    21. 	key_it_config();
    22.  
    23. 	key3_it_config();
    24.  
    25.  
    26.  
    27. 	//完成GPIO相关初始化
    28.  
    29. 	all_led_init();
    30.  
    31.  
    32.  
    33. 	//风扇初始化
    34.  
    35.     fs_init();
    36.  
    37.  
    38.  
    39. 	//蜂鸣器初始化
    40.  
    41.     fmq_init();
    42.  
    43.  
    44.  
    45. 	while(1)
    46.  
    47. 	{
    48.  
    49. 		//保证主程序不结束
    50.  
    51. 	}
    52.  
    53. 	
    54.  
    55. 	return 0;
    56.  
    57.  
    58.  
    59. }
    60.  
    61.  
    62.

    key_it.c:

    1. #include"key_it.h"
    2.  
    3. void key3_it_config()
    4. {
    5. 	RCC->MP_AHB4ENSETR |= (0x1<<5);
    6. 	GPIOF->MODER &= (~(0x3<<16));
    7. 	EXTI->EXTICR3 &= (~(0xFF)<<0);
    8. 	EXTI->EXTICR3 |= (0x5<<0);
    9. 	EXTI->FTSR1 |= (0x1<<8);	
    10. 	EXTI->C1IMR1 |= (0x1<<8);	
    11. 	GICD->ISENABLER[3] |= (0x1<<2);
    12. 	GICD->IPRIORITYR[24] &= (~(0x1F<<19));	
    13. 	GICD->ITARGETSR[24] &= (~(0x3<<16));
    14. 	GICD->ITARGETSR[24] |= (0x1<<16);
    15. }
    16.  
    17. void key_it_config()
    18. {
    19. 	//RCC使能GPIOF时钟
    20. 	RCC->MP_AHB4ENSETR |= (0x1<<5);
    21.  
    22. 	//设置PF9、PF7、PF8 GPIO输入
    23. 	//PF9
    24. 	GPIOF->MODER &= (~(0x3<<18));
    25. 	//PF8
    26. 	GPIOF->MODER &= (~(0x3<<16));
    27. 	//PF7
    28. 	GPIOF->MODER &= (~(0x3<<14));	
    29.  
    30. 	//设置PF9、PF7、PF8产生EXIT事件 EXTI_EXTICRx
    31. 	//PF7
    32. 	EXTI->EXTICR2 &= (~(0xFF)<<24);
    33. 	EXTI->EXTICR2 |= (0x5<<24);
    34. 	//PF8
    35. 	EXTI->EXTICR3 &= (~(0xFF)<<0);
    36. 	EXTI->EXTICR3 |= (0x5<<0);
    37. 	//PF7
    38. 	EXTI->EXTICR3 &= (~(0xFF)<<8);
    39. 	EXTI->EXTICR3 |= (0x5<<8);
    40. 	
    41. 	//设置事件触发方式为下降沿触发EXTI_FTSR1
    42. 	//PF7
    43. 	EXTI->FTSR1 |= (0x1<<7);	
    44. 	//PF8
    45. 	EXTI->FTSR1 |= (0x1<<8);	
    46. 	//PF9
    47. 	EXTI->FTSR1 |= (0x1<<9);
    48.  
    49. 	//设置EXTI事件触发不屏蔽EXTI_IMR1
    50. 	//PF7
    51. 	EXTI->C1IMR1 |= (0x1<<7);	
    52. 	//PF8
    53. 	EXTI->C1IMR1 |= (0x1<<8);	
    54. 	//PF9
    55. 	EXTI->C1IMR1 |= (0x1<<9);
    56. 	
    57. 	//使能中断能转发到特定的CPU接口层GICD_ISENABLERx
    58. 	//PF7 97号中断
    59. 	GICD->ISENABLER[3] |= (0x1<<1);
    60. 	//PF8 98号中断
    61. 	GICD->ISENABLER[3] |= (0x1<<2);
    62. 	//PF9 99号中断
    63. 	GICD->ISENABLER[3] |= (0x1<<3);	
    64.  
    65. 	//GICD_ISENABLERx设置中断优先级
    66. 	//PF7
    67. 	GICD->IPRIORITYR[24] &= (~(0x1F<<11));
    68. 	//PF8
    69. 	GICD->IPRIORITYR[24] &= (~(0x1F<<19));	
    70. 	//PF7
    71. 	GICD->IPRIORITYR[24] &= (~(0x1F<<27));
    72.  
    73. 	//设置当前中断被转发到那一个cpu处理GICD_ITARGETSRx
    74. 	//PF7 97中断
    75. 	GICD->ITARGETSR[24] &= (~(0x3<<8));
    76. 	GICD->ITARGETSR[24] |= (0x1<<8);
    77. 	//PF8 98中断
    78. 	GICD->ITARGETSR[24] &= (~(0x3<<16));
    79. 	GICD->ITARGETSR[24] |= (0x1<<16);
    80. 	//PF9 99中断
    81. 	GICD->ITARGETSR[24] &= (~(0x3<<24));
    82. 	GICD->ITARGETSR[24] |= (0x1<<24);
    83.  
    84. 	//使能组0转发中断GICD_CTLR
    85. 	GICD->CTRL |= 0x1;
    86.  
    87. 	//设置中断优先级掩码GICC_CTLR
    88. 	GICC->PMR |= (0x1F<<3);
    89.  
    90. 	//使能CPU可以处理组0转发的中断GICC_CTLR
    91. 	GICC->CTRL |= 0x1;
    92.  }
    93.  
    94. //延时函数
    95. void deley(int ms)
    96. {
    97. 	int i,j;
    98. 	for(i=0;i<ms;i++)
    99. 	{
    100. 		for(j=0;j<2000;j++);
    101. 	}
    102. }
    103.  
    104. //GPIO初始化
    105. void all_led_init()
    106. {
    107. 	//RCC使能
    108. 	RCC->MP_AHB4ENSETR |= (0x3<<4);
    109.  
    110. 	//设置PE10、PF10、PE8为输出
    111. 	GPIOE->MODER &= (~(0x3<<20));
    112. 	GPIOE->MODER |= (0x1<<20);
    113. 	GPIOF->MODER &= (~(0x3<<20));
    114. 	GPIOF->MODER |= (0x1<<20);
    115. 	GPIOE->MODER &= (~(0x3<<16));
    116. 	GPIOE->MODER |= (0x1<<16);
    117.  
    118. 	//设置推挽输出
    119. 	GPIOE->OTYPER &= (~(0x1<<10));
    120. 	GPIOF->OTYPER &= (~(0x1<<10));
    121. 	GPIOE->OTYPER &= (~(0x1<<8));
    122.  
    123. 	//设置三个管脚低速输出
    124. 	GPIOE->OSPEEDR &= (~(0x3<<20));
    125. 	GPIOF->OSPEEDR &= (~(0x3<<20));
    126. 	GPIOE->OSPEEDR &= (~(0x3<<16));
    127.  
    128. 	//设置三个管脚输出时无上拉电阻和下拉电阻
    129. 	GPIOE->PUPDR &=(~(0x3<<20));
    130. 	GPIOF->PUPDR &=(~(0x3<<20));
    131. 	GPIOE->PUPDR &=(~(0x3<<16));
    132. }
    133.  
    134. //风扇初始化
    135. void fs_init()
    136. {
    137. 	//RCC使能
    138. 	RCC->MP_AHB4ENSETR |= (0x1<<4);
    139.  
    140. 	//设置PE9为输出
    141. 	GPIOE->MODER &= (~(0x3<<18));
    142. 	GPIOE->MODER |= (0x1<<18);
    143. 	//设置推挽输出
    144. 	GPIOE->OTYPER &= (~(0x1<<9));
    145. 	//设置管脚低速输出
    146. 	GPIOE->OSPEEDR &= (~(0x3<<18));
    147. 	//设置管脚输出时无上拉电阻和下拉电阻
    148. 	GPIOE->PUPDR &=(~(0x3<<18));
    149. }
    150.  
    151. //蜂鸣器初始化
    152. void fmq_init()
    153. {
    154. 	//RCC使能
    155. 	RCC->MP_AHB4ENSETR |= (0x1<<1);
    156.  
    157. 	//设置PB6为输出
    158. 	GPIOB->MODER &= (~(0x3<<12));
    159. 	GPIOB->MODER |= (0x1<<12);
    160. 	//设置推挽输出
    161. 	GPIOB->OTYPER &= (~(0x1<<6));
    162. 	//设置管脚低速输出
    163. 	GPIOB->OSPEEDR &= (~(0x3<<12));
    164. 	//设置管脚输出时无上拉电阻和下拉电阻
    165. 	GPIOB->PUPDR &=(~(0x3<<12));
    166. }
    167.

    do_irq.c:

    1. #include"key_it.h"
    2. extern void printf(const char *fmt, ...);
    3. unsigned int i=0;
    4.  
    5. void do_irq(void) 
    6. {
    7. 	int irqno;   //保存中断号
    8. 	irqno=GICC->IAR & 0x3FF;
    9. 	switch(irqno)
    10. 	{
    11. 	case 99://key1
    12. 		{
    13. 			//按键1中断处理
    14. 			printf("KEY1 INT\n");
    15. 			if((GPIOE->ODR==(GPIOE->ODR&(~(0x1<<10))))&&(GPIOF->ODR==(GPIOF->ODR&(~(0x1<<10))))&&(GPIOE->ODR==(GPIOE->ODR&(~(0x1<<8)))))
    16. 			{
    17. 				GPIOE->ODR |= (0x1<<10);
    18. 				GPIOF->ODR |= (0x1<<10);
    19. 				GPIOE->ODR |= (0x1<<8);
    20. 			}
    21. 			else if((GPIOE->ODR==(GPIOE->ODR|(0x1<<10)))&&(GPIOF->ODR==(GPIOF->ODR|(0x1<<10)))&&(GPIOE->ODR==(GPIOE->ODR|(0x1<<8))))
    22. 			{
    23. 				GPIOE->ODR &= (~(0x1<<10));				
    24. 				GPIOF->ODR &= (~(0x1<<10));				
    25. 				GPIOE->ODR &= (~(0x1<<8));				
    26. 			}
    27. 			//清除挂起中断标志位GICD_ICPENDRx
    28. 			GICD->ICPENDR[3] |= (0x1<<3);
    29. 			//清除中断触发标志位EXTI_FPR1
    30. 			EXTI->FPR1 |= (0x1<<9);
    31. 			break;
    32. 		}
    33. 	case 97://key2
    34. 		{
    35. 			//按键2中断处理
    36. 			printf("KEY2 INT\n");
    37. 			if(GPIOB->ODR==(GPIOB->ODR&(~(0x1<<6))))
    38. 			{
    39. 				GPIOB->ODR |= (0x1<<6);
    40. 			}
    41. 			else if(GPIOB->ODR==(GPIOB->ODR|(0x1<<6)))
    42. 			{
    43. 				GPIOB->ODR &= (~(0x1<<6));
    44. 			}
    45.  
    46. 			//清除挂起中断标志位GICD_ICPENDRx
    47. 			GICD->ICPENDR[3] |= (0x1<<1);
    48. 			//清除中断触发标志位EXTI_FPR1
    49. 			EXTI->FPR1 |= (0x1<<7);
    50. 			break;
    51. 		}
    52. 	case 98://key3
    53. 		{
    54. 			//按键3中断处理
    55. 			printf("KEY3 INT\n");
    56. 			if(GPIOE->ODR==(GPIOE->ODR&(~(0x1<<9))))
    57. 			{
    58. 				GPIOE->ODR |= (0x1<<9);
    59. 			}
    60. 			else if(GPIOE->ODR==(GPIOE->ODR|(0x1<<9)))
    61. 			{
    62. 				GPIOE->ODR &= (~(0x1<<9));
    63. 			}
    64.  
    65. 			//清除挂起中断标志位GICD_ICPENDRx
    66. 			GICD->ICPENDR[3] |= (0x1<<2);
    67. 			//清除中断触发标志位EXTI_FPR1
    68. 			EXTI->FPR1 |= (0x1<<8);
    69. 			break;
    70. 		}
    71. 	}
    72.  
    73. 	//清除处理完的中断号GICC_EOIR
    74. 	GICC->EOIR=irqno;
    75.  
    76. }

    key_it.h:

    1. #ifndef __KEY_IT_H__
    2. #define __KEY_IT_H__
    3. #include"stm32mp1xx_rcc.h"
    4. #include"stm32mp1xx_gpio.h"
    5. #include"stm32mp1xx_exti.h"
    6. #include"stm32mp1xx_gic.h"
    7.  
    8. void key_it_config();
    9. void key3_it_config();
    10. void deley(int ms);
    11. void all_led_init();
    12. void fs_init();
    13. void fmq_init();
    14.  
    15. #endif

    现象：

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  • 原文地址：https://blog.csdn.net/2301_77616453/article/details/133799411