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apps/03_adc_pa1_poll/src/main.c

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+#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;
+}