使用函数regsiter_chrdev(major,”first_drv”,&first_drv_fops)注册告诉内核(通过major索引)。 ...
因为中断服务例程都是顺序执行的，在响应一个中断的时候不应该被打断。相反，这些可延时任务执行时，可以...
）函数，问题一：这里的irq_no可不可以静态的分配？（就是比如我要用98号中断，直接给传98给irq_no...
int res,irq_num; irq_num=gpio_to_irq(6); res=request_irq(irq_num,get_state,IRQF_DISABLED,"buttons",(void *)buf); if(res<0) { printk("request irq failed!\n"); return -EIO; } set_irq_type(irq_num, IRQ_TYPE_LEVEL_LOW); Would you please give me some suggestions about how to...
[ 72.185484] alt_up_pci_probe() failed with error: -22The status_use_accessors value is 0x10c00, and irq_settings_can_request(), where this value and with _IRQ_NOREQEUST, the result is not zero, so EINVAL returned.This is really puzzled for me. What I am dong wrong ? Attachment ...
I am trying to register an ISR with irq number 121 but getting -22 as error. We have a external GPIO controller which is mapped to address space - 0x80040000 and the GPIO pin is connected to external irq0[3:0] in the zynq CPU. here is the code snippet for registering the irq. pr...
In Windows, you can check IRQ assignments through the Device Manager. Open it, locate the device of interest, right-click, choose "Properties," go to the "Resources" tab, and view the IRQ information. On Linux®, you can use terminal commands like cat /proc/interrupts to see IRQ detail...
Problem : the request_irq() in xilinx_axienet_open() fails with error -22 ... net eth0: axienet_open() xilinx_axienet 40000000.ethernet: request_irq() failed, errno:-22 ... I didn't found application notes on 10G Ethernet Subsystem for Zynq device. All the available documentation is...
An Interrupt Request (IRQ) is a signal from a device or program that prompts a Real-Time Operating System (RTOS) to pause its current task and determine the next action to take. It helps prioritize tasks and manage multiple interruptions in a computer system. ...
前面有篇文章使用杂项设备完成了按键驱动的编写，实现了按键轮询检测，通过read函数向应用层传递按键值，这...