hi,
i need some good reference or sample code for software based SPI
for AT89c51 (only for master side).i have searched but not getting code or reference which show how to implement SPI in software. so please help me with your valuable
suggestions and ideas or experience.
also what is SPI mode 0,0 and 1,1?? how they will be implemented in software?

please do reply

 

This link will take you to an application note on the SPI interface at the ATMEL website. It may not be exactly what you are looking for but the information it contains could serve as a starting point for your coding efforts.

hgmjr

 

I doubt this is still of use but I have been looking for a similar thing and have found an SPI reference manual (and example code in C:/) for the 8051 - written by ATMEL.

http://www.atmel.com/dyn/resources/prod_documents/doc4348.pdf

Enjoi

 

What do you mean software based SPI? Are you trying to generating signal on a 8051 without a built-in SPI hardware? Then you would need to have a good understanding of the SPI protocol and simply pulse the I/O pins to generate the required signals.

 

SPI is easily implemented with software bitbanging. But you suffer with code overhead.

http://www.atmel.com/dyn/resources/prod_documents/doc1108.pdf
http://www.atmel.com/dyn/resources/prod_documents/avr320.zip