Add my_adc/

apps/my_adc/boards/nucleo_f767zi.overlay

@@ -0,0 +1,24 @@
+#include <zephyr/dt-bindings/adc/adc.h>
+
+&adc1 {
+    pinctrl-0 = <&adc1_in3_pa3>;
+    pinctrl-names = "default";
+    status = "okay";
+    st,adc-prescaler = <4>;
+    #address-cells = <1>;
+    #size-cells = <0>;
+
+    channel@3 {
+        reg = <3>;
+        zephyr,gain = "ADC_GAIN_1";
+        zephyr,reference = "ADC_REF_INTERNAL";
+        zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+        zephyr,resolution = <12>;
+    };
+};
+
+/ {
+    aliases {
+        myadc = &adc1;
+    };
+};

apps/my_adc/boards/stm32f4_disco.overlay

@@ -0,0 +1,30 @@
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/* PA3 is used by ADC1 channel 3, so keep USART2 as a TX-only console. 
+&usart2 {
+	pinctrl-0 = <&usart2_tx_pa2>;
+	pinctrl-names = "default";
+};*/
+
+&adc1 {
+	pinctrl-0 = <&adc1_in3_pa3>;
+	pinctrl-names = "default";
+	status = "okay";
+	st,adc-prescaler = <4>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@3 {
+		reg = <3>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};
+
+/ {
+	aliases {
+		myadc = &adc1;
+	};
+};