Example_S32K144_I2C_Master_MPL3115A2_S32DSR1_v3

4 Kudos

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Detailed Description:
This is a rather simple example that shows LPI2C0 in Master mode.
MPL3115A2 sensor is used as a slave device.
I2C bus at PTA2 SDA, PTA3 SCL (2-pin open drain mode),
external pull-up resistors on BRKTSTBC-P3115 board.
BRKTSTBC-P3115 supplied from P3V3 (J3.7).
Baud rate 400kHz, source SIRCDIV2 8MHz.
The master reads periodically MPL3115A2 status register (every 200ms)
and temperature / altitude data once they are ready.
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Test HW: S32K144EVB-Q100, BRKTSTBC-P3115
MCU: S32K144 0N57U
IDE: S32DSR1, OpenSDA
Target: internal_FLASH
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arjunna_mm · ‎03-01-2020

Hello,

I am using this code for i2c protocol between s32k144(master) and lidar lite v3(slave). I have configured the addresses and registers properly. I am receiving distance values , however I have to reboot the sensor to get new values. I tested the sensor with other boards , it works fine. This sensor does not support repeated start hence I have edited the read and write accordingly.

I am attaching my modified code below. Could you tell me what could be my mistake?

Any help appreciated!!

LidarV3.7z - Box

Thank you,

Arjun.

danielmartynek · ‎03-05-2020

Hello Arjun,

Can you please scope the bus and compare it with the specified lidar lite v3 I2C protocol?

Do you see any error flags?

Thanks,

BR, Daniel