i2c interface

seeni vasan

Other Parts Discussed in Thread: PCA9534

hai

i tried to interface the usbstick5505 with i2c io expander bus and when i run the csl program the bus is not responding but when i run the loopback program the csl is passed .help me on how to communicate with the i2c io expander pca9534 .

over 14 years ago

0 Hyun Kim over 14 years ago

TI__Genius 14965 points

Hi,

Do you have a scope to check I2C waveform?

Regards,

Hyun

0 seeni vasan over 14 years ago in reply to Hyun Kim

Intellectual 580 points

hai hyun

i dont have the scope to see the waveform and iam unable to communicate the i2c io expander ic no activity on the bus .

0 Hyun Kim over 14 years ago in reply to seeni vasan

TI__Genius 14965 points

Hi,

You need to confirm your I2C hardware connection first.

Regards,

Hyun

0 seeni vasan over 14 years ago in reply to Hyun Kim

Intellectual 580 points

hai hyum kim i has already the audio codec in the i2c bus and i added the io exander i2c ic from ti when i run the example program tone it plays the sine wave and what i wanted was when i run the io expander or the audio codec program through chip support library program functions i find no activity on the bus

with regards

seeni

0 seeni vasan over 14 years ago in reply to seeni vasan

Intellectual 580 points

hai hyum kim

i uas using the io expander i2c ic pca9534 with tmdx5505ezdsp and when i write the data to the register and after completing the write i find the scl line is still been held low no stop conditin generated still it says csl i2c polled mode test passed .help me on i2c interface .

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