Enable serial output and logging for battery example

Author: StarSphere-1024

examples/zephyr-battery/src/main.c

@@ -6,7 +6,8 @@
 #include <zephyr/drivers/regulator.h>
 #include <zephyr/drivers/adc.h>
 #include <zephyr/kernel.h>
-
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(battery, CONFIG_LOG_DEFAULT_LEVEL);
 
 #if !DT_NODE_EXISTS(DT_PATH(zephyr_user)) || \
 	!DT_NODE_HAS_PROP(DT_PATH(zephyr_user), io_channels)

examples/zephyr-battery/zephyr/prj.conf

@@ -1,3 +1,10 @@
 CONFIG_GPIO=y
 CONFIG_ADC=y
-CONFIG_ADC_ASYNC=y
+CONFIG_ADC_ASYNC=y
+
+CONFIG_SERIAL=y
+CONFIG_STDOUT_CONSOLE=y
+CONFIG_PRINTK=y
+CONFIG_LOG=y
+CONFIG_LOG_PRINTK=y
+CONFIG_LOG_MODE_IMMEDIATE=y