SPI & I2C driver

user4661707

Other Parts Discussed in Thread: CC2640R2F, CC2640

Hi,

I got a trouble while I'm doing the SPI and I2C in same time by using the example project. Currently if I open SPI driver first, then I can't transmit the I2C data ( but can open I2C driver after opening the SPI). Until I close the SPI, the I2C can correctly working, Where is the issue could be on my side?

over 8 years ago

0 LeonardEllis over 8 years ago

TI__Guru 71526 points

Please provide information as to what device you are using.

0 user4661707 over 8 years ago in reply to LeonardEllis

Intellectual 530 points

Sorry, I use CC2640R2F chip, and use the custom hardware.

0 A. Rebel over 8 years ago in reply to user4661707

TI__Genius 11740 points

Are your using the same IO's for both drivers? That could be the issue - you mentioned using a custom board, take note that depending on your chip size, you'll have access to different number of IOs to use for each module.

As far I know, you shouldn't have any issues using both at the same time, given they are different IOs.

You could even use the sensor controller for one and the M3 for the other if power is a concern.

Regards,
Rebel

0 user4661707 over 8 years ago in reply to A. Rebel

Intellectual 530 points

Hi, Rebel.

No, both drivers are configure to different IO pins, currently if I open I2C driver after open SPI then transfer I2C data, the transmit will fail, but when I close SPI, the transfer are successful after all.

But I try with CC2640 with my custom board, the issue won't show.

Thanks.

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SPI & I2C driver