I m a Professional C programmer. I m 学习装置驱动器,希望书写(和测试)一个简单的序列号港口驱动器,按9600的注册率发送特性。 我开始撰写该守则。
The problem is the function request_region fails (returns NULL) when I try to allocate the serial port registers with address range 03f8-03ff. When I issue the command "cat /proc/ioports" I can see the following line
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之所以如此,是因为这些港口已经分配给现有的序列司机。
Do I need to unload the already existing serial driver to test my driver? If so, how can I do that?
你们是正确的:已经有一个使用这些港口的油轮司机。 我假设你重新使用英特尔箱,因此,你会再次使用8250名司机。 您可以尝试通过:
modprobe -vr 8250
但是,如果你重新使用由分局提供的弹片,这很可能失败,因为其中多数人都拥有这一模块。 你们可以检查。
grep CONFIG_SERIAL_8250 /boot/config-`uname -r`
页: 1 然后,你们需要汇编一下,8250名司机实际上是一个可装的单元。
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