Thanks for your help, The signal that causes the interrupt is also connected to the write enable (start filling fifo) of the fifo, so that means when an interrupt occurs, the fifo is being triggered to fill itself with data from an ADC. There is no signal to wake up the process on the wait queue because only the interrupt causes the fifo to be filled, there is no signal that says: the fifo is full now. So what i want is: interrupt -> wait for 400 uS --> read fifo --> send fifo data to userspace. the only problem i have is the delay, the rest is obvious to me. Christian.
Why don't you want to use udelay(). You have three functions to busywait for that small amount of time. udelay, ndelay and mdelay. othres wait at least 1 jiffy. So, you might not have any other choice than to use udelay() :). regards Manish Regmi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
