i2c interface in tms320f28069

sagar yadav

Other Parts Discussed in Thread: TMS320F28069, PCF8575, PCA9539

Hi,

I am trying to use two i2c interface for read and write purpose of digital output and digital input in tms320f28069.

I am able to read and write separalty inputs/outputs. But when i am going to combine both the function in same file i was only able to write the outputs but not able to read inputs...I am not getting why this is happening. For i2c code i am using bit banging driver...

Please replay...

Thanks in advance...

over 12 years ago

0 trupti golatkar over 11 years ago

Intellectual 680 points

Can anybody help me...........

0 Frank Bormann over 11 years ago in reply to trupti golatkar

Mastermind 7585 points

Some more inputs from your side are required.

What types of I2C Devices are connected to the I2C?

How do you initialize I2C?

What opmode do you use for I2C?

Do you use pollin gor interrupts for I2C?

etc.

0 trupti golatkar over 11 years ago in reply to Frank Bormann

Intellectual 680 points

I am using PCF8575 for i2c interface.we required two I2C for interfacing 16 I2C Devices for that I wrote the two I2C Bit Bagging drivers.I am doing this by polling method.

0 Frank Bormann over 11 years ago in reply to trupti golatkar

Mastermind 7585 points

The 28069 have only 1 I2C-Interface. Where did you connect your 2nd I2C? Did you a software emulation using GPIO's? If yes, I would suspect that there are some bugs in your code or at least one.

I am using the 28069 I2C with an PCA9539 and it is working fine.

0 trupti golatkar over 11 years ago in reply to Frank Bormann

Intellectual 680 points

thanks frank,

code was ok... there was problem wid hardware...

thanks...

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i2c interface in tms320f28069