accessible I2C port on SABRE AI development board

[jeevanmahadevu]

Hello all,

We want to hook gyroscope onto the SABRE AI development board. From gyroscope i have I2C/SPI as the output interface to processor.

Please suggest me how to go ahead with hardware connection and steps of software development.

Regards,

Jeevan M

[igorpadykov]

Hi Jeevan

seems one can use I2C2/I2C3 ports (MMA8451)

i.MX6_SABRE_AI_DESIGNFILES   SCH-26662.pdf p.13

I am afraid there are no gyroscope examples but one can reuse MMA8451

driver, refer to attached Linux Manual Chapter 37 and

sensors porting guide. There is MMA8451 example in SDK:

i.MX 6Series Platform SDK : Bare-metal SDK

Best regards

igor

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[jeevanmahadevu]

Thank you Igor, The references gave me the clear idea on the software stack, drivers and about embedding it in the kernel. BUT i still have no idea on how to put the gyroscope on the SABRE AI development board, i didn't see any I2C pins left out to for expansion ( to connect any devices ) onto it ?

Is USB only hope, say i have the daughter PCB card on which i have gyroscope communicating to microcontroller with the USB ?

Regards,

Jeevan M

[igorpadykov]

Jeevan

these signals go through connector

connecting two boards, several devices may

be attached to one i2c line.

~igor

[jeevanmahadevu]

Hi Igor,

In SABRE AI board, Why  Hi-Z_FOR_BOOT_B is provided during the boot only for Touch interrupt, Magnetometer interrupt, GPS interrupt, UART3_RTS of Bluetooth and for USB_HOST, Not for any other peripherals ?

Regards,

Jeevan M