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dgh.h

dgh.h

dgh.h

/////////////////////////////////////////////////////////////////////////////
// DGH.H
//
//  Last updated: 6/25/2001
//
//  Part of the source code for the M3 Turret
//
// This file contains all DGH communication constants/routines
/////////////////////////////////////////////////////////////////////////////

/////////////////////////////////////////////////////////////////////////////
// DGH communication constants
//#define DGHPrePause 10
//#define DGHTimeout 1000 /* Timeout duration for DGH commands */
//#define DGHInitString "xx0104C2"
//#define Guest 1


/////////////////////////////////////////////////////////////////////////////
// CDGH Class Definition
//
//  The CDGH class encapsulates the DGH modules.  The class can initialize
//  the DGH modules, send and receive commands, and read the current
//  DGH readings.

class CDGH
{
	public:
	float Reading; 				// Current reading of the DGH
	int Step;							// Current DGH read step (query, wait for response)
	char Response[80];		// DGH's response
	unsigned long Time;		// Time when the query was sent
	int ResponseLength; 	// Length of DGH's response to query
	int ErrorCount;
	int CheckSetup;				// Flags DGH module to check setup on boot

	void Init(char address);
	// Initializes class and checks DGH init string.
	void Send(char *Data);
	// Sends the string Data to the DGH
	int Receive(char *Response,int Timeout);
	// Puts a DGH response into string Response.
	// Waits up to Timeout milliseconds for the response to be completed.
	// Returns a 0 on success, 1 on failure.
	int Command(char *Data,char *Response,int Timeout);
	// Sends the command in Data, and waits for a Response for Timeout ms.
	int Update();
	// Reads the DGHs current reading and updates the onscreen display

	private:
	char Address; // The one letter address (example, 'a')
	char InitString[10]; // The DGHs initialization string
} DGHs[3];

/////////////////////////////////////////////////////////////////////////////
// DGHFormat - returns a float in a string properly formatted for the DGHs
char * DGHFormat(float f,char *s);
// Pass the float to be formatted in f, and the string will be returned in s
// Returns f in the format "+00000.00"

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