Hi,
I am new to AD537x DACs. Currently I want to control the evaluation board eval-ad5370 via SPI directly with my Raspberry Pi 4. I built the kernel (wiki.analog.com/.../raspberrypi) and add the Linux iio drivers for Eval-ad5370 via "make menuconfig" . However, I encounter troubles when writing the device tree overlay file. I copied and change the codes on dtbo file of ad5686 from (https://github.com/analogdevicesinc/linux/commit/4a5b5b72149ad91fe7aa857a75d24fc97f13722e#diff-dc041e47200262dfab1ff9f9e0ef64c7). The code is shown as follows:
dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2708";
fragment@0 {
target-path = "/";
__overlay__ {
adc_vref: fixedregulator@0 {
compatible = "regulator-fixed";
regulator-name = "fixed-supply";
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
regulator-boot-on;
};
};
};
fragment@1 {
target = <&spi0>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
ad5370@0{
compatible = "adi,ad5370";
reg = <0>;
spi-max-frequency = <1000000>;
spi-cpha;
vcc-supply = <&adc_vref>;
};
};
};
};
The codes actually compiled with one warning, using "dtc -I dts -O dtb -o" commands. However, it fails to makefile using
sudo dtoverlay rpi-ad5370-overlay.dtbo
I also did not see my dac is connected using
cd /sys/bus/iio/devices/
ls
So I think my codes for device tree file has issues. I am wondering if someone can help me with the correct setting. I may need the required properties to build the device tree, such as this link (github.com/.../dac) or this link (wiki.analog.com/.../ad5676)
I think there are some threads talking about using Raspberry Pi to control the ad5370. However, I am not sure how they successfully added the device tree.
My ultimate goal is using python codes to control it, such as this link (github.com/.../AD5370). So I think after successfully adding the device tree overlay, I can achieve my goal.
Another option is using windows. However, I may need to program the channels and make a system with feedback(No speed requirements). If there are APIs on python with on windows platform, it will also be great.
Thanks a lot in advance for your help!
