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PIO Kernel module

Honored Contributor II


I'm currently using a Kernel module for LED PIO as a character device. I control it with fopen, fprintf, fread in my application. But I would like to write integer and use 32 bit registers. I know i could use fwrite but i'm not sure the module can handle it. 

What can i do in order to send integers instead of bytes to the kernel module? 

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Honored Contributor II

Unix file io is all character/byte based, the stdio functions are best used for text! 


You probably ought to use open/read/write/close rather than the stdio forms, at least they'll generate one system call per function call... 


For device control look at ioctl().