Software SPI

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Anders
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Posted by Anders: Tue. Oct 14, 2003 - 03:13 PM
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I wan't to use a slave SPI port on small AVR's without hardware SPI interface.
Does anyone have code example of software SPI interface in C?

Thanks in advance.

Tags:

AVR Microcontrollers, megaAVR and tinyAVR
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Silver Markadmin
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Posted by admin: Tue. Oct 14, 2003 - 03:19 PM
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Hi,

Does Atmel application note AVR320 help any (I didn't actually read it, just went and found it)?

http://www.atmel.com/dyn/product...

Regards,
Steve

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Silver Markadmin
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Posted by admin: Tue. Oct 14, 2003 - 04:25 PM
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Hi again,

Also check out project #0165 in the User Projects section of the Academy tab.

Regards,
Steve

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Anders
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Posted by Anders: Tue. Oct 14, 2003 - 06:06 PM
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Thanks for the replies Steve.
I have already read AVR320, I would have mentioned this in my first post, but I forgot - sorry.
Project #165 looks usefull though, I would try to have a look at this project.
http://8515.avrfreaks.net/Freaks...

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Arnoldus
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Posted by Arnoldus: Tue. Mar 29, 2005 - 07:49 AM
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Hello anders/all,
I’ve the same question:

Does anyone have code example of software SPI interface in C?

Thanks.

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rhilton
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Posted by rhilton: Tue. Mar 29, 2005 - 09:21 AM
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Here's an SPI interface bit-bashed to a 24 bit LTC2440 ADC taking data to output via RS232.

Attachment(s): 

File cmeter50.c

Ralph Hilton

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rhilton
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Posted by rhilton: Tue. Mar 29, 2005 - 10:07 AM
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Here's another - it gets a frequency from an RS232 connection and bit bashes instuctions to an AD9833 DDS.

Attachment(s): 

File acumeter.c

Ralph Hilton

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c_mcu_faq
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Posted by c_mcu_faq: Tue. Mar 29, 2005 - 12:44 PM
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Read this one:

http://www.embedded.com/showArti...

Sergey.

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