a problem with the FVID_create()

hi,

i use

hVP0CapChan0 = FVID_create("/VPORT0/A/0", IOM_INPUT, &status, (Ptr)&vpCaptureParams, NULL);
if( hVP0CapChan0 == NULL)
    printf("error\n");

in order to access to VP0. But the thing is i always got a NULL handle.

and I stepped in to the program and found that there is a problem on TVP5154_powerdown().

in this function

retVal |= regSetTVP5154(chan,
                                addrI2C,
                                TVP5154_DECODER_WRITE_ENABLES_ADDR,
                                &decoderChan,
                                numBytes);
retVal |= regSetTVP5154(chan,
                                addrI2C,
                                TVP5154_POWERUP_REG_ADDR,
                                &enableDecoder,
                                numBytes);

and other regSetTVP5154() invokings seem returning wrong because of the i2c_writeReg() in it returning wrong.

since the i2c_init() got me a valid handle, where could it be wrong when it invokes i2c_writeReg()?

any hints could be helpful.

thanks a lot!