1) Make sure the bttv driver is loaded.
2) Make sure the i2c-dev module is loaded / compiled into the kernel.
3) Make sure which bus to use (you can use the detection scripts from
lm-sensors and/or the dmesg output after loading bttv module).
4) Verify which device to use - some distros only have /dev/i2c/0
If all else fails, read the documentation at the lmsenors site...
-justin
ho ho wrote:
> Dear Justin Schoeman and all:
>
> Thanks to Justin, I have some ideas of writing I2C for
> my card. I've wrote a program just to open the i2c,
> but the program didn't successfully go thru. The
> following is my program:
>
> //
> #include <fcntl.h>
> #include <stdio.h>
> #include <linux/i2c.h>
> #include <linux/i2c-dev.h>
>
>
> int main()
> {
> int file;
> printf("Opening device...\n");
> if ((file = open("/dev/i2c-0",O_RDWR)) < 0)
> {
> printf("\nError:%d\n", file);
> perror("open() failed");
> }
> printf("Done\n");
>
>
> close(file);
> }
> //
> The error message is like:
>
> Opening device...
>
> Error:-1
> open() failed: No such device
> Done
> //
> I already "cat" the bus and it said:
> i2c-0 i2c bt848 #0 Bit-shift
> algorithm
>
> Does anyone know what I should do to fix it? My PCI
> card is there, and a bt878 is on there. Thanks!!!
>
> _________________________________________________________
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