voltage and current sensing

app/src/main.c

@@ -78,14 +78,46 @@ int main(void)
 		   rows,
 		   cfb_get_display_parameter(dev, CFB_DISPLAY_COLS));
 
-	cfb_framebuffer_invert(dev);
-
 	cfb_set_kerning(dev, 3);
 
+	const struct device *ina;
+
+	ina = DEVICE_DT_GET(DT_NODELABEL(ina231));
+	if (!device_is_ready(dev))
+	{
+		printf("Device %s not ready\n", ina->name);
+		return 0;
+	}
+
 	while (1)
 	{
 		for (int i = 0; i < MIN(x_res, y_res); i++)
 		{
+			int ret;
+
+			ret = sensor_sample_fetch(ina);
+			if (ret < 0)
+			{
+				LOG_ERR("Could not fetch sample (%d)", ret);
+				return 0;
+			}
+
+			struct sensor_value voltage, current;
+			ret = sensor_channel_get(ina, SENSOR_CHAN_VOLTAGE, &voltage);
+			if (ret < 0)
+			{
+				LOG_ERR("Could not get sample (%d)", ret);
+				return 0;
+			}
+			ret = sensor_channel_get(ina, SENSOR_CHAN_CURRENT, &current);
+			if (ret < 0)
+			{
+				LOG_ERR("Could not get sample (%d)", ret);
+				return 0;
+			}
+
+			printf("voltage: %d.%06d\tcurrent: %d.%06d\n", voltage.val1, voltage.val2, current.val1, current.val2);
+
 			cfb_framebuffer_clear(dev, false);
 			if (cfb_print(dev,
 						  "0123456789mMgj!\"§$%&/()=",

boards/bh/mellifera_rev1/mellifera_rev1.dts

@@ -101,12 +101,6 @@
 			label = "Interrupt from BMP388 barometer";
 			zephyr,code = <INPUT_KEY_0>;
 		};
-
-		int_pow: int_pow {
-			gpios = <&gpio0 31 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
-			label = "Interrupt from current sensor";
-			zephyr,code = <INPUT_KEY_0>;
-		};
 	};
 
 
@@ -145,7 +139,6 @@
 	pinctrl-1 = <&i2c0_sleep>;
 	pinctrl-names = "default", "sleep";
 
-
 	ssd1306: ssd1306@3d {
 		compatible = "solomon,ssd1306fb";
 		reg = <0x3d>;
@@ -159,6 +152,15 @@
 		com-invdir;
 		prechargep = <0x22>;
 	};
+
+	ina231: ina231@45 {
+		compatible = "ti,ina230";
+		reg = <0x45>;
+		// irq-gpios = <&gpio0 31 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+		current-lsb-microamps = <7>;
+		rshunt-micro-ohms = <50000>;
+		adc-mode = "Bus and shunt voltage continuous";
+	};
 };
 
 &spi1 {