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How to use DS3231M PMOD

hai.bi

My ultimate goal is to use an RTC and I have bought DS3231M PMOD so I am going to try it on MicroZed.


I have gone through Vivado and configured I2C0 on 14-15 and exported according to the link http://microzed.org/content/problem-linaro-and-i2c-devices


I am wondering what to do in kernel config?  Since I am using the MIO, what do I need to do for the I2C hardware bus support?  Then what to do with the driver?  there is only DS3232 driver should I use it?


Then should I modify the device tree manually before build?


Regards,

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    I don't have a foolproof answer for you, but if it were me I would try the following:

    1. Modify the device tree manually as per the link you referenced, and see if you can achieve the same results.  Sounds like you set up your platform with the same I2C connection.

    2. There is an Ubuntu design for Zynq (Zedboard or Mini-ITX) that uses I2C devices.  You can check the kernel configuration in either design to see how the I2c drivers are connected, and how their device tree looks.  (Assuming 1 doesn't get you where you need to be).

    3. You may need to do some detective work on the kernel configuration by checking the .config file for I2C references.  Then you can search for those same references in the menuconfig tool and that will ensure when you change a setting, dependencies are also set.  If you know your way around the .config thoroughly, then it's ok to modify it by hand.  But I think in most cases you're better off using the tool.

    Hope that gets you going.  Let us know how you make out.

    Ron

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  • 0

    I don't have a foolproof answer for you, but if it were me I would try the following:

    1. Modify the device tree manually as per the link you referenced, and see if you can achieve the same results.  Sounds like you set up your platform with the same I2C connection.

    2. There is an Ubuntu design for Zynq (Zedboard or Mini-ITX) that uses I2C devices.  You can check the kernel configuration in either design to see how the I2c drivers are connected, and how their device tree looks.  (Assuming 1 doesn't get you where you need to be).

    3. You may need to do some detective work on the kernel configuration by checking the .config file for I2C references.  Then you can search for those same references in the menuconfig tool and that will ensure when you change a setting, dependencies are also set.  If you know your way around the .config thoroughly, then it's ok to modify it by hand.  But I think in most cases you're better off using the tool.

    Hope that gets you going.  Let us know how you make out.

    Ron

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