DriverStationLCD.h

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2008. All Rights Reserved.                             */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib.  */
/*----------------------------------------------------------------------------*/

#ifndef __DRIVER_STATION_LCD_H__
#define __DRIVER_STATION_LCD_H__

#include "SensorBase.h"

class DriverStationLCD : public SensorBase
{
public:
    static const uint32_t kSyncTimeout_ms = 20;
    static const uint16_t kFullDisplayTextCommand = 0x9FFF;
    static const int32_t kLineLength = 21;
    static const int32_t kNumLines = 6;
    enum Line {kMain_Line6=0, kUser_Line1=0, kUser_Line2=1, kUser_Line3=2, kUser_Line4=3, kUser_Line5=4, kUser_Line6=5};

    virtual ~DriverStationLCD();
    static DriverStationLCD *GetInstance();

    void UpdateLCD();
    void Printf(Line line, int32_t startingColumn, const char *writeFmt, ...);
    void VPrintf(Line line, int32_t startingColumn, const char *writeFmt, va_list args);
    void PrintfLine(Line line, const char *writeFmt, ...);
    void VPrintfLine(Line line, const char *writeFmt, va_list args);
 
    void Clear();

protected:
    DriverStationLCD();

private:
    static void InitTask(DriverStationLCD *ds);
    static DriverStationLCD *m_instance;
    DISALLOW_COPY_AND_ASSIGN(DriverStationLCD);

    char *m_textBuffer;
    SEM_ID m_textBufferSemaphore;
};

#endif