AM2432: One wire interface using GPIO configuration

kadam shah

Part Number: AM2432

Tool/software:

Hello Team,

We are planning to implement the One-Wire interface on the AM2432BSEFHIALVR using GPIO-based bit banging. Is this approach feasible using GPIO pins?

Regards.

3 months ago

0 Tushar Thakur 3 months ago

TI__Guru 53848 points

Hi Kadam,

Can you please tell us, what is the use case here to implement one wire interface?

Can you not use I2C for communication in your system?

Regards,

Tushar

0 kadam shah 3 months ago

Prodigy 50 points

Hi Tushar,

We are planning to upgrade the microcontroller used in our existing design. That’s why we wanted to confirm whether it’s possible to implement a 1-Wire interface with the new microcontroller.

Regards,

Kadam

0 Tushar Thakur 3 months ago in reply to kadam shah

TI__Guru 53848 points

Hi Kadam,

Please allow some time to check this internally and revert back.

Regards,

Tushar

0 Swargam Anil 3 months ago in reply to Tushar Thakur

TI__Guru 50537 points

Hello Kadam,

The AM243x does not provide a dedicated One-Wire peripheral. One-Wire can be implemented by bit-banging a GPIO .
When implementing, you must maintain the precise Reset / Presence and ON/OFF bit slot timing windows required by One-Wire devices .My suggestion is go with simple state machine to implement the One wire protocol implementation for the RESET - > CMD - > Data slots .

Regards,

Anil.

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AM2432: One wire interface using GPIO configuration