MPC8260 - I2C - single channel 1-wire master (DS2482) - 1
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MPC8260 - I2C - single channel 1-wire master (DS2482) - 1

 
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Guest
Posted: Fri Dec 31, 2004 7:56 am    Post subject: MPC8260 - I2C - single channel 1-wire master (DS2482) - 1 Reply with quote
Hi,

I'm writing an I2C driver for the MPC8260 that needs to read/write to a
1-wire EEPROM via a single channel 1-wire master. Since I'm new to the
embedded world, I was wondering, if I want to send a READ ROM command
to the 1 wire EEPROM, how must I go about doing that via software? How
must I format the Tx buffer of the I2C to send that out to the 1-wire
EEPROM via the single-channel 1-wire master?
Thanks for your help in advance.

Dead Fish
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Gary Kato
Guest
Posted: Fri Dec 31, 2004 8:26 pm    Post subject: Re: MPC8260 - I2C - single channel 1-wire master (DS2482) Reply with quote
Quote:
Since I'm new to the
embedded world, I was wondering, if I want to send a READ ROM command
to the 1 wire EEPROM, how must I go about doing that via software? How
must I format the Tx buffer of the I2C to send that out to the 1-wire
EEPROM via the single-channel 1-wire master?

Have you read the DS2482 datasheet?
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Guest
Posted: Fri Dec 31, 2004 8:36 pm    Post subject: Re: MPC8260 - I2C - single channel 1-wire master (DS2482) - Reply with quote
Yes, I have. I've looked at the I2C Communication Examples many, many
times. Do I format the TX buffer for each byte of data or can I format
it to take several bytes of data?
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Rene
Guest
Posted: Fri Dec 31, 2004 9:12 pm    Post subject: Re: MPC8260 - I2C - single channel 1-wire master (DS2482) - Reply with quote
<deadfish007@yahoo.com> schrieb im Newsbeitrag
news:1104507377.039287.271450@c13g2000cwb.googlegroups.com...
Quote:
Yes, I have. I've looked at the I2C Communication Examples many, many
times. Do I format the TX buffer for each byte of data or can I format
it to take several bytes of data?

Do yourself a favour and write a bit banging driver. It is much easier than
using the I2C unit. Unless you have fully understood the programming model
of the CPM, your driver will be up much faster.

- Rene
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Guest
Posted: Fri Dec 31, 2004 11:12 pm    Post subject: Re: MPC8260 - I2C - single channel 1-wire master (DS2482) - Reply with quote
Thanks to everyone that have responded. I've figured it out.
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