怎样创造网站,聚名网下载,html写的网页怎么在手机上看,网站没被收录//编译驱动 (注意Makefile的编译到移植到开发板的内核) make archarm //清除编译生成文件 make clean ****************************************** //安装驱动 insmod mycdev.ko //卸载驱动 rmmod mycdev 需要在内核路径/arch/arm/boot/dts/ 修改 stm32mp157a-fsm… //编译驱动 (注意Makefile的编译到移植到开发板的内核) make archarm //清除编译生成文件 make clean ****************************************** //安装驱动 insmod mycdev.ko //卸载驱动 rmmod mycdev 需要在内核路径/arch/arm/boot/dts/ 修改 stm32mp157a-fsmp1a-dts 文件 *************************** 添加以下内容 leds{led1-gpiosgpioe 10 0;//10表示引脚编号 0表示默认led2-gpiosgpiof 10 0;led3-gpiosgpioe 8 0;
};myirq{interrupt-parentgpiof;//引用中断父节点interrupts9 0,7 0,8 0;//声明和中断父节点的关系 9表示索引号0表示默认设置
};mycdev.c
#include linux/init.h
#include linux/module.h
#include linux/of.h
#include linux/of_irq.h
#include linux/of_gpio.h
#include linux/gpio.h
#include linux/interrupt.hstruct device_node *dev;
/* leds{led1-gpiosgpioe 10 0;//10表示引脚编号 0表示默认led2-gpiosgpiof 10 0;led3-gpiosgpioe 8 0;
};*/
struct gpio_desc *gpiono1; // led1
struct gpio_desc *gpiono2; // led2
struct gpio_desc *gpiono3; // led3
/*myirq{interrupt-parentgpiof;//引用中断父节点interrupts9 0,7 0,8 0;//声明和中断父节点的关系 9表示索引号0表示默认设置
};
*/
unsigned int irqno1; // key1
unsigned int irqno2; // key2
unsigned int irqno3; // key3// 定时器处理函数
void ctl_led(struct gpio_desc *gpiono)
{// led状态取反gpiod_set_value(gpiono, !gpiod_get_value(gpiono));
}
// 中断处理函数
irqreturn_t myirq_handler(int irq, void *dev)
{if (irq irqno1){printk(KEY1_INTERRUPT\n);ctl_led(gpiono3);}else if (irq irqno2){printk(KEY2_INTERRUPT\n);ctl_led(gpiono2);}else if (irq irqno3){printk(KEY3_INTERRUPT\n);ctl_led(gpiono1);}return IRQ_HANDLED;
}static int myled_to_init(int a)
{// 根据设备树节点的路径解析设备树信息dev of_find_node_by_path(/leds);if (dev NULL){printk(解析设备树节点失败\n);return -EFAULT;}printk(解析设备树节点成功\n);// 申请gpio_desc对象并设置输出为低电平gpiono1 gpiod_get_from_of_node(dev, led1-gpios, 0, GPIOD_OUT_LOW, NULL);if (IS_ERR(gpiono1)){printk(申请gpio对象失败\n);return -PTR_ERR(gpiono1);}printk(申请gpio对象成功\n);gpiono2 gpiod_get_from_of_node(dev, led2-gpios, 0, GPIOD_OUT_LOW, NULL);if (IS_ERR(gpiono2)){printk(申请gpio对象失败\n);return -PTR_ERR(gpiono2);}printk(申请gpio对象成功\n);gpiono3 gpiod_get_from_of_node(dev, led3-gpios, 0, GPIOD_OUT_LOW, NULL);if (IS_ERR(gpiono3)){printk(申请gpio对象失败\n);return -PTR_ERR(gpiono3);}printk(申请gpio对象成功\n);return 0;
}static void myled_to_exit(int a)
{// 灭灯gpiod_set_value(gpiono1, 0);gpiod_set_value(gpiono2, 0);gpiod_set_value(gpiono3, 0);// 释放gpio编号gpiod_put(gpiono1);gpiod_put(gpiono2);gpiod_put(gpiono3);printk(led注销成功);
}static int __init mycdev_init(void)
{int ret;myled_to_init(1);// 解析按键的设备树节点dev of_find_node_by_path(/myirq);if (dev NULL){printk(解析设备树节点失败\n);return -EFAULT;}printk(解析设备树节点成功\n);// 根据设备树节点解析出软中断号irqno1 irq_of_parse_and_map(dev, 0); // 按键1索引号为0if (!irqno1){printk(解析软中断号1失败\n);return -ENXIO;}printk(解析软中断号1成功 irqno%d\n, irqno1);irqno2 irq_of_parse_and_map(dev, 1); // 按键2索引号为1if (!irqno2){printk(解析软中断号2失败\n);return -ENXIO;}printk(解析软中断号2成功 irqno%d\n, irqno2);irqno3 irq_of_parse_and_map(dev, 2); // 按键3索引号为2if (!irqno3){printk(解析软中断号3失败\n);return -ENXIO;}printk(解析软中断号3成功 irqno%d\n, irqno3);// 注册中断ret request_irq(irqno1, myirq_handler, IRQF_TRIGGER_FALLING, key1, NULL);if (ret){printk(注册中断1失败\n);return ret;}printk(注册中断1成功\n);ret request_irq(irqno2, myirq_handler, IRQF_TRIGGER_FALLING, key2, NULL);if (ret){printk(注册中断2失败\n);return ret;}printk(注册中断2成功\n);ret request_irq(irqno3, myirq_handler, IRQF_TRIGGER_FALLING, key3, NULL);if (ret){printk(注册中断3失败\n);return ret;}printk(注册中断3成功\n);return 0;
}
static void __exit mycdev_exit(void)
{myled_to_exit(1);// 注销中断free_irq(irqno1, NULL);free_irq(irqno2, NULL);free_irq(irqno3, NULL);printk(irq注销成功\n);
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE(GPL);
Makefile KERNELDIR 赋予的路径可能有所不同 modname ? mycdev
arch ? armifeq ($(arch),arm)
KERNELDIR : /home/ubuntu/13_UBOOT/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61
else
KERNELDIR : /lib/modules/$(shell uname -r)/build
endifPWD : $(shell pwd)all:make -C $(KERNELDIR) M$(PWD) modulesclean:make -C $(KERNELDIR) M$(PWD) cleandistclean:make -C $(KERNELDIR) M$(PWD) cleanobj-m : $(modname).o
