Linux/OPT3001: OPT3001 not giving lux value

Muhammed Ali

Prodigy 30 points

Part Number: OPT3001

Tool/software: Linux

Hi Team,

Device Config :

device : NXP i.MX 7Dual SABRE Smart Device (imx7dsabresd)

Kernal Version : 4.14.98-imx_4.14.98_2.0.0_ga+g5d6cbea

I have been using the OPT3001 sensor for ALS, it is not giving any lux value on cat in_illuminance_input command on "root@imx7dsabresd:/sys/bus/iio/devices/iio:device2#", but it gives cat: in_illuminance_input: Connection timed out. I have configured the menuconfig for opt3001 driver and already make changes on dts file as shown below. I am using the gpio 2 pin 18 as interrupt.

    opt3001@44 {
    compatible = "ti,opt3001";
    reg = <0x44>;
    interrupt-parent = <&gpio2>;
    interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
    };

over 6 years ago

0 Alex Bhandari-Young over 6 years ago

TI__Mastermind 25895 points

Hi Muhammed,

I am not familiar with the device you mentioned (NXP i.MX 7Dual SABRE Smart Device). If you clarify the system and software configuration and how OPT3001 is connected to the board I can try to help further, but this sounds to be an issue with the software/config of the NXP board you are using rather than OPT3001 related.

Best,

Alex

0 Muhammed Ali over 6 years ago in reply to Alex Bhandari-Young

Prodigy 30 points

Hi Alex,

Thanks for the quick reply,

Imx7dsabresd is an evaluation kit, the linux operating system running on it and bsp is from nxp community as yocto build, opt3001 is connected externally to the board, i2c pins are connected to the i2c bus 3 and interrupt pin connected to gpio 2 pin 18. I have enabled the opt3001 on menuconfig. after that i could able to see the opt3001 device on the following directory /sys/bus/iio/devices/iio\:device2, so i think software/configuration of the nxp board is ok, the issue is happen when i tried to read the lux value by following command cat in_illuminance_input. one more thing I am able to read the lux value directly through the i2c Driver (without opt3001), so I think the issue may be on opt3001 driver.

0 Alex Bhandari-Young over 6 years ago in reply to Muhammed Ali

TI__Mastermind 25895 points

Muhammed,

What OPT3001 driver are you using and where did you get it from?

Best,

Alex

0 Muhammed Ali over 6 years ago in reply to Alex Bhandari-Young

Prodigy 30 points

Alex ,

opt3001.c - Texas Instruments OPT3001 Light Sensor driver is used it already present in the SDK. drivers/iio/light/opt3001.c

0 Alex Bhandari-Young over 6 years ago in reply to Muhammed Ali

TI__Mastermind 25895 points

Hi Muhammed,

Can you provide a link there I can find this file or I can get the SDK and check this file?

Best,

Alex

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Linux/OPT3001: OPT3001 not giving lux value