Timer's Bug solved linux's use of Timer4-general Linux technology-Linux programming and kernel information. The following is a detailed description. When I wrote the PWM driver last week, I encountered a problem. After Timer initialization, the console could not accept keyboard input. The execution of the program itself was not affected, but it was just the end of the process, pressing ctrl + c does not respond. after thinking about it, I finally thought about where I wrote the console, as if I was using a timer for timing or something, so I went online to find information.
After searching for half a day, I finally found a person in china linux forum who encountered the same problem as me. According to him, linux uses Timer4, but the specific purpose is not clearly explained, I am still not familiar with the kernel, so the problem is gone. however, my problem has been solved. in fact, it was because of the rush of time that the program was too crude to overwrite the value of the entire TCON register. even if I do not know that linux will occupy a timer, it will not be a problem if I only change the Timer-related part of the register.
The next step is to compile the 2.6 kernel, hoping to have a new understanding of the entire system, especially the file system.
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