topic Re: SPI Query in 8-bit Microcontrollers

SPI Query

carlosomarharoc — Tue, 06 Jan 2015 17:37:12 GMT

Hi!

I have some questions about SPI function

With the SPI working in bidirectional mode. ¿Can I send dates to the slaves and can receive dates from slaves?

I don't know if I explained

I really appreciate your help

Re: SPI Query

adriancano — Wed, 07 Jan 2015 17:43:34 GMT

Hi,

Yes, if the SPI module supports single-wire bidirectional mode it works just like the normal SPI mode but using just one pin in master mode and slave mode in this case MOMI for master and SISO for SLAVE. Please refer to the section MOSI — Master Data Out, Slave Data In and MISO — Master Data In, Slave Data Out in the reference manual there you can check the information how the SPI lines behave when bidirectional mode is activated.

Here you can see a table that compares Normal Mode and Bidirectional Mode

Hope this information can help you.

Best Regards,
Adrian Sanchez Cano
Technical Support Engineer
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Re: SPI Query

carlosomarharoc — Thu, 08 Jan 2015 14:49:37 GMT

Hi,

Thanks Adrian. I cheked the reference manual in MOSI and MISO. I solve the configuration for SPI.

Now i have some code acoording of SPI in single-wire bidirectional mode.

Just need testing it, thanks for reply.

Regards!