Update repo

apps/03_adc_pa1_poll/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+# Locate the Zephyr build system as a CMake package
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+# Project name
+project(adc_single_channel)
+
+# Add source files belong to this application
+target_sources(app PRIVATE src/main.c)

apps/03_adc_pa1_poll/boards/nucleo_f767zi.overlay

@@ -0,0 +1,25 @@
+/ {
+    aliases {
+        led0 = &red_led;
+        led1 = &blue_led;
+        led2 = &green_led;
+		sw0 = &user_button0;
+    };
+	
+	gpio_keys {
+		compatible = "gpio-keys";
+		
+		user_button0: button {
+			label = "Button";
+			gpios = <&gpioc 13 GPIO_ACTIVE_HIGH>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&adc1{
+    pinctrl-0 = <&adc1_in1_pa1>;
+    pinctrl-names = "default";
+	st,adc-prescaler = <4>;
+	status = "okay";
+};

apps/03_adc_pa1_poll/boards/stm32f4_disco.overlay

@@ -0,0 +1,16 @@
+/ {
+    aliases {
+        led0 = &red_led_5;
+        led1 = &blue_led_6;
+        led2 = &green_led_4;
+        led3 = &orange_led_3;
+		sw0 = &user_button;
+    };
+};
+
+&adc1{
+    pinctrl-0 = <&adc1_in1_pa1>;
+    pinctrl-names = "default";
+	st,adc-prescaler = <4>;
+	status = "okay";
+};

apps/03_adc_pa1_poll/prj.conf

@@ -0,0 +1,6 @@
+CONFIG_GPIO=y
+CONFIG_SERIAL=y
+CONFIG_ADC=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_CONSOLE=y
+CONFIG_PRINTK=y

apps/03_adc_pa1_poll/src/main.c

@@ -0,0 +1,64 @@
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include <zephyr/devicetree.h>
+#include <zephyr/sys/printk.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/uart.h>
+#include <zephyr/drivers/adc.h>
+
+
+#define ADC_NODE DT_NODELABEL(adc1)
+
+#if !DT_NODE_HAS_STATUS(ADC_NODE, okay)
+#error "ADC1 not available; Enable it in a board overlay if needed."
+#endif
+
+static const struct device *const adc_dev = 
+	DEVICE_DT_GET(ADC_NODE);
+
+static uint16_t sample;
+
+// Channel Configuration
+static struct adc_channel_cfg ch1_cfg = {
+    .gain             = ADC_GAIN_1,
+    .reference        = ADC_REF_INTERNAL,
+    .acquisition_time = ADC_ACQ_TIME_DEFAULT,
+    .channel_id       = 1,
+    .differential     = 0,
+};
+
+static struct adc_sequence seq = {
+    .channels    = BIT(1),  // Channel bitmap
+    .buffer      = &sample,
+    .buffer_size = sizeof(sample),
+    .resolution  = 12,  // 12-bit
+};
+
+
+int main(void)
+{
+    if(!device_is_ready(adc_dev)) {
+        return 0;
+    }
+
+    // Configure the channel
+    if(adc_channel_setup(adc_dev, &ch1_cfg) != 0) {
+        return 0;
+    }
+
+	printk("\r\n[ADC] PA1(ADVC1_IN1) polling\r\n");
+
+	while (1) {
+
+		int rc = adc_read(adc_dev, &seq);
+		if(rc == 0) {
+            uint16_t raw = sample;
+            printk("ADC raw value = %u\r\n", raw);
+        }
+
+		k_sleep(K_MSEC(50));
+
+	}
+
+	return 0;
+}