real use of the display

app/src/main.c

@@ -70,6 +70,7 @@ int main(void)
 		printf("font width %d, font height %d\n",
 			   font_width, font_height);
 	}
+	cfb_framebuffer_set_font(dev, 0);
 
 	printf("x_res %d, y_res %d, ppt %d, rows %d, cols %d\n",
 		   x_res,
@@ -90,10 +91,10 @@ int main(void)
 	}
 
 	while (1)
-	{
-		for (int i = 0; i < MIN(x_res, y_res); i++)
 	{
 		int ret;
+		char str_v[15] = {0};
+		char str_i[15] = {0};
 
 		ret = sensor_sample_fetch(ina);
 		if (ret < 0)
@@ -116,12 +117,18 @@ int main(void)
 			return 0;
 		}
 
-			printf("voltage: %d.%06d\tcurrent: %d.%06d\n", voltage.val1, voltage.val2, current.val1, current.val2);
+		sprintf(str_v, "V:%d.%06d", voltage.val1, voltage.val2);
+		sprintf(str_i, "I:%d.%06d", current.val1, current.val2);
+
+		printf("%s\t%s\n", str_v, str_i);
 
 		cfb_framebuffer_clear(dev, false);
-			if (cfb_print(dev,
+		if (cfb_print(dev, str_v, 0, 0))
-						  "0123456789mMgj!\"§$%&/()=",
+		{
-						  i, i))
+			printf("Failed to print a string\n");
+			continue;
+		}
+		if (cfb_print(dev, str_i, 0, 16))
 		{
 			printf("Failed to print a string\n");
 			continue;
@@ -132,7 +139,6 @@ int main(void)
 		k_sleep(K_MSEC(20));
 #endif
 	}
-	}
 
 	int ret;
 	unsigned int period_ms = BLINK_PERIOD_MS_MAX;