Initial en11 exploration.

app/src/drivers/sensors/en11/CMakeLists.txt

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources_ifdef(CONFIG_EN11 en11.c)
+zephyr_library_sources_ifdef(CONFIG_EN11_TRIGGER en11_trigger.c)

app/src/drivers/sensors/en11/Kconfig

@@ -0,0 +1,52 @@
+# EN11 incremental encoder sensor configuration options
+
+# Copyright (c) 2020 Peter Johanson
+# SPDX-License-Identifier: MIT
+
+menuconfig EN11
+	bool "EN11 Incremental Encoder Sensor"
+	depends on GPIO
+	help
+	  Enable driver for EN11 incremental encoder sensors.
+
+if EN11
+
+choice
+	prompt "Trigger mode"
+	default EN11_TRIGGER_NONE
+	help
+	  Specify the type of triggering to be used by the driver.
+
+config EN11_TRIGGER_NONE
+	bool "No trigger"
+
+config EN11_TRIGGER_GLOBAL_THREAD
+	bool "Use global thread"
+	depends on GPIO
+	select EN11_TRIGGER
+
+config EN11_TRIGGER_OWN_THREAD
+	bool "Use own thread"
+	depends on GPIO
+	select EN11_TRIGGER
+
+endchoice
+
+config EN11_TRIGGER
+	bool
+
+config EN11_THREAD_PRIORITY
+	int "Thread priority"
+	depends on EN11_TRIGGER_OWN_THREAD
+	default 10
+	help
+	  Priority of thread used by the driver to handle interrupts.
+
+config EN11_THREAD_STACK_SIZE
+	int "Thread stack size"
+	depends on EN11_TRIGGER_OWN_THREAD
+	default 1024
+	help
+	  Stack size of thread used by the driver to handle interrupts.
+
+endif # EN11

app/src/main.c

@@ -8,6 +8,7 @@
 #include <device.h>
 #include <devicetree.h>
 #include <settings/settings.h>
+#include <drivers/sensor.h>
 
 #include <logging/log.h>
 LOG_MODULE_REGISTER(zmk, CONFIG_ZMK_LOG_LEVEL);
@@ -18,6 +19,27 @@ LOG_MODULE_REGISTER(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #define ZMK_KSCAN_DEV DT_LABEL(ZMK_MATRIX_NODE_ID)
 
+static struct sensor_trigger trigger;
+
+void encoder_change(struct device *dev, struct sensor_trigger *trigger)
+{
+	LOG_DBG("");
+}
+
+void init_sensor()
+{
+	struct device *dev = device_get_binding("Rotary Encoder");
+	if (!dev) {
+		LOG_DBG("NO ENCODER!");
+		return;
+	}
+
+	trigger.type = SENSOR_TRIG_DATA_READY;
+	trigger.chan = SENSOR_CHAN_ROTATION;
+
+	sensor_trigger_set(dev, &trigger, encoder_change);
+}
+
 void main(void)
 {
 	printk("Welcome to ZMK!\n");
@@ -31,4 +53,6 @@ void main(void)
 #ifdef CONFIG_SETTINGS
 	settings_load();
 #endif
+
+	init_sensor();
 }