I don't think the master has an address. I used the detection utils
from lmsensors to find the client address for my display.
-justin
ho ho ho ... wrote:
> Thanks Justin. I've successfully got my program
> running. I have one more question though. Does the
> BT878 (i2c master) has an address? I found only one
> i2c address after searching thru a loop using
> i2c_smbus_read_byte(file). The reason I did it
> becuase I could NOT find those write/read i2c slave
> address for my Philips chip. So, I wasn't sure if I
> was talking to the Philips chip or other device. Is
> there anyway to check? Thanks again!!! :>
>
> hobobcat.
>
> --- Justin Schoeman <justin@xxxxxxxxxxxxxxxxxxxx>
> 的郵件內容：> 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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