Merge branch 'master' of https://github.com/szmoore/MCTX3420.git

[matches/MCTX3420.git] / server / sensor.h

diff --git a/server/sensor.h b/server/sensor.h
index b9a5aad..da23044 100644 (file)
--- a/server/sensor.h
+++ b/server/sensor.h
@@ -9,9 +9,53 @@
 #ifndef _SENSOR_H
 #define _SENSOR_H
 
+#include "common.h"
+
+/** Number of data points to keep in sensor buffers **/
+#define SENSOR_DATABUFSIZ 10
+
+
+/** Number of sensors **/
+#define NUMSENSORS 1
+
+/** Structure to represent data recorded by a sensor at an instant in time **/
+typedef struct
+{
+       /** Time at which data was taken **/
+       float time;
+       /** Value of data **/
+       float value;
+} DataPoint;
+
+/** Structure to represent a sensor **/
+typedef struct
+{
+       /** ID number of the sensor **/
+       enum {SENSOR_TEST0=0, SENSOR_TEST1=1, SENSOR_NONE} id;
+       /** Buffer to store data from the sensor **/
+       DataPoint buffer[SENSOR_DATABUFSIZ];
+       /** Index of last point written in the data buffer **/
+       int write_index;
+       /** Offset position in binary file for query thread to read from**/
+       int read_offset;
+       /** Binary file to write data into when buffer is full **/
+       FILE * file;
+       /** Thread running the sensor **/
+       pthread_t thread;
+       /** Mutex to protect access to stuff **/
+       pthread_mutex_t mutex;
+
+       
+} Sensor;
+
+/** Array of Sensors **/
+extern Sensor g_sensors[];
+
+extern void Sensor_Init(Sensor * s, int id); // Initialise sensor
+extern void * Sensor_Main(void * args); // main loop for sensor thread; pass a Sensor* cast to void*
+
+extern int Sensor_Query(Sensor * s, DataPoint * buffer, int bufsiz); // fill buffer with sensor data
 
 
-extern void * Sensor_Main(void * args); // main loop for sensor thread
-
 #endif //_SENSOR_H