-
/**
* @file sensor.h
- * @purpose Declarations for sensor thread related stuff
+ * @brief Declarations for sensor thread related stuff
*/
-
-
#ifndef _SENSOR_H
#define _SENSOR_H
+/** Number of data points to keep in sensor buffers **/
+#define SENSOR_DATABUFSIZ 10
+/** Size of the query buffer. @see Sensor_Handler **/
+#define SENSOR_QUERYBUFSIZ 10
+
+/** Number of sensors **/
+#define NUMSENSORS 4
+
+/** Safety Values for sensors **/
+#define ANALOG_TEST0_SAFETY 1000
+#define ANALOG_TEST1_SAFETY 1000
+#define DIGITAL_TEST0_SAFETY 1
+#define DIGITAL_TEST1_SAFETY 1
+
+
+typedef enum SensorId {
+ ANALOG_TEST0,
+ ANALOG_TEST1,
+ DIGITAL_TEST0,
+ DIGITAL_TEST1
+} SensorId;
+
+/** Human readable names for the sensors **/
+extern const char * g_sensor_names[NUMSENSORS];
+
+/** Structure to represent data recorded by a sensor at an instant in time **/
+typedef struct
+{
+ /** Time at which data was taken **/
+ double time_stamp;
+ /** Value of data **/
+ double value;
+} DataPoint;
+
+/** Structure to represent a sensor **/
+typedef struct
+{
+ /** ID number of the sensor **/
+ SensorId id;
+ /** Buffer to store data from the sensor **/
+ DataPoint buffer[SENSOR_DATABUFSIZ];
+ /** Index of last point written in the data buffer **/
+ int write_index;
+ /** Number of points read **/
+ long points_read;
+ /** 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;
+
+
+
+
+extern void Sensor_Spawn(); // Initialise sensor
+extern void Sensor_Join(); //Join sensor threads
+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
+extern void Sensor_Handler(FCGIContext *context, char * params);
#endif //_SENSOR_H