feat(app/hmi-generic): Listen on events and play a notification sound

Author: iqyx

applications/hmi-generic/app.c

@@ -7,6 +7,7 @@
  */
 
 #include <main.h>
+#include <interfaces/event.h>
 #include "app.h"
 
 #define MODULE_NAME "hmi"
@@ -47,10 +48,17 @@ static void com_task(void *p) {
 static void input_task(void *p) {
 	App *self = p;
 
-
 	while (true) {
-
-		vTaskDelay(1000);
+		enum event_type type = EV_TYPE_NONE;
+		enum event_code code = EV_CODE_NONE;
+		int32_t value = 0;
+
+		if (self->input->vmt->listen(self->input, &type, &code, &value) == EV_RET_OK) {
+			if (value == 1) {
+				/* On key down. */
+				self->speaker->vmt->start(self->speaker);
+			}
+		}
 	}
 	vTaskDelete(NULL);
 }
@@ -72,6 +80,19 @@ app_ret_t app_init(App *self) {
 		return APP_RET_FAILED;
 	}
 
+	/** @todo configure which input device to use.  */
+	self->input = NULL;
+	if (iservicelocator_query_type_id(locator, ISERVICELOCATOR_TYPE_EVENT, 0, (Interface **)&self->input) != ISERVICELOCATOR_RET_OK) {
+		u_log(system_log, LOG_TYPE_ERROR, U_LOG_MODULE_PREFIX("no suitable input device found"));
+		return APP_RET_FAILED;
+	}
+
+	self->speaker = NULL;
+	if (iservicelocator_query_type_id(locator, ISERVICELOCATOR_TYPE_WAVEFORM_SINK, 0, (Interface **)&self->speaker) != ISERVICELOCATOR_RET_OK) {
+		u_log(system_log, LOG_TYPE_ERROR, U_LOG_MODULE_PREFIX("no suitable speaker found"));
+		return APP_RET_FAILED;
+	}
+
 	xTaskCreate(com_task, "hmi-com", configMINIMAL_STACK_SIZE + 256, (void *)self, 1, &(self->com_task));
 	if (self->com_task == NULL) {
 		u_log(system_log, LOG_TYPE_ERROR, U_LOG_MODULE_PREFIX("cannot create application com task"));

applications/hmi-generic/app.h

@@ -11,6 +11,8 @@
 #include <interfaces/datagram.h>
 #include <interfaces/fb.h>
 #include <interfaces/i2c-bus.h>
+#include <interfaces/event.h>
+#include <interfaces/waveform-sink.h>
 #include <services/nbus2/nbus2.h>
 
 
@@ -24,6 +26,8 @@ typedef struct {
 	TaskHandle_t input_task;
 	Fb *fb;
 	I2cBus *i2c;
+	Event *input;
+	WaveformSink *speaker;
 } App;