A question about configuring C6748's SPI Controller as SPI Slave

Oliver Chen

Dear All,
I've a question about configuring C6748's SPI Controller as SPI Slave. The desired SPI protocol is similar to the one used in ordinary SPI Flash. In such protocol the SPI /CS signal remain asserted (Lo) during the command, address, write/read data phases. As an example, you can check the timing diagram in P. 25 Figure 7 of the following datasheet of some SPI Flash:

www.winbond.com/.../da00-w25x40cva1.pdf

I'm wondering whether it is possible to use C6748's SPI Port to implement an SPI Slave supporting SPI-Flash-like protocol?

Regards,

Oliver

over 10 years ago

0 RandyP over 10 years ago

TI__Guru* 84110 points

Oliver,

For what purpose do you want to do this?

Regards,
RandyP

0 Oliver Chen over 10 years ago in reply to RandyP

Intellectual 725 points

Dear Randy,

My purpose is to communicate with a SPI Master which issue SPI protocol

similar to that used by SPI Flash.

Is this clear?

Regards,

Oliver

0 Arvind Singh over 10 years ago

Mastermind 6115 points

Hi Oliver,

Have you tried C6748 based starterware example code for SPI Peripheral.
You can install starterware package from below mentioned link.
processors.wiki.ti.com/.../StarterWare

After installing at below mentioned location you will find spi example.
~/C6748_StarterWare_1_20_03_03\build\c674x\cgt_ccs\c6748\lcdkC6748\spi

/* To Configure SPI to Master Mode */
#define SPI_MASTER_MODE (SPI_SPIGCR1_MASTER | SPI_SPIGCR1_CLKMOD)

/* To Configure SPI to Slave Mode */
#define SPI_SLAVE_MODE 0

You can refer it and can modify to work as a slave. Hope it may help you out.

0 Titusrathinaraj Stalin over 10 years ago in reply to Oliver Chen

TI__Guru** 116100 points

Hi Oliver,
You have to access the SPI controller in slave mode right ?
We have a example code for SPI master but you can modify the code to enable "SLAVE" support using "SPIModeConfigure" API as Arvind said.

Please write to us if any issues.

0 Oliver Chen over 10 years ago in reply to Arvind Singh

Intellectual 725 points

Dear Arvind,
Yes, I had already used Starterware to develop SPI Master function few years ago. Now I'm trying to implement the SPI Slave function. Thanks for your reply and information!

Regards,

Oliver

0 Oliver Chen over 10 years ago in reply to Titusrathinaraj Stalin

Intellectual 725 points

Dear Titus,
OK, I see. I'll try your suggestion.
Thanks for your reply and suggestion!

Regards,

Oliver

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A question about configuring C6748's SPI Controller as SPI Slave