Diff: Handlers/SdHandler.h

Revision:

0:2df78a4443cd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Handlers/SdHandler.h	Sun Apr 10 15:47:33 2016 +1000
@@ -0,0 +1,59 @@
+#ifndef __SD_HANDLER_H__
+#define __SD_HANDLER_H__
+
+#include "SDFileSystem.h"
+#include "AbstractHandler.h"
+
+class CircBuff;
+
+/*!
+ * \brief The SdHandler class writes messages to file and handles SD card status
+ * 
+ * A data CSV file is written with timestamps and the result from the GroveDht22.
+ * A system log, not yet fully implemented, tracks system events for debugging purposes.
+ */
+class SdHandler : public AbstractHandler
+{
+public:
+    SdHandler(MyTimers * _timer);
+    ~SdHandler();
+
+    void run();
+
+    void setRequest(int request, void *data = 0);
+
+    bool sdOk();
+
+    enum request_t {
+        sdreq_SdNone,       ///< to init
+        sdreq_LogData,      ///< Send struct containing a result and timestamp. This turns it into a line in a csv file
+        sdreq_LogSystem     ///< write raw string to system logging file (errors, events, etc)
+    };
+
+private:
+    SDFileSystem * m_sdfs;
+    FILE * m_data;
+    FILE * m_syslog;
+
+    enum mode_t{
+        sd_Start,                   ///< Set up the state machine
+        sd_CheckSysLogBuffer,       ///< See if any data should be written to the log file
+        sd_CheckDataLogBuffer,      ///< See if any data should be written to the data file
+
+        sd_WaitError                ///< Error. wait for a while
+    };
+    mode_t mode;
+
+    request_t m_lastRequest;
+    
+    // helpers
+    void csvStart(time_t time);
+    void csvData(const char * s, int len);
+    void csvEnd();
+    void logEvent(const char * s);
+    
+    CircBuff *m_dataLogBuff;        ///< Data waiting to be written to the data CSV file
+    CircBuff *m_sysLogBuff;         ///< Data waiting to be written to the system log file (not yet implemented)
+};
+
+#endif // __SD_HANDLER_H__