/*
 * Program: IRRecv-DetectPF.nxc
 * By CH, Chen; 10-13-2009
 * Using Hitechnic IRRecv to detect PF RC IR signals and display details
 */

#define IRRECV_PORT         S1
#define I2C_DEVICE          0x02
#define CONTROL_FIELD       0x42

byte I2C_buf[];
/* ********************************************************
 * Display receiving data from registers 0x42 till 0x49
 *1234567890123456
 *     A    B
 *Ch1
 *Ch2
 *Ch3
 *Ch4
 * ******************************************************** */
void DisplayMotorCtrl()
{
     char a_val, b_val;
     ClearScreen();
     TextOut(0, LCD_LINE1, "Detect by IRRecv" );
     TextOut(0, LCD_LINE3, "    A    B" ); //A,B - 24,54
     TextOut(0, LCD_LINE4, "Ch1       " );
     TextOut(0, LCD_LINE5, "Ch2       " );
     TextOut(0, LCD_LINE6, "Ch3       " );
     TextOut(0, LCD_LINE7, "Ch4       " );
     
     for (int xii=0; xii<4; xii++)
     {
         a_val = I2C_buf[xii*2];
         b_val = I2C_buf[xii*2+1];
         NumOut(24, LCD_LINE4-8*xii, a_val);
         NumOut(54, LCD_LINE4-8*xii, b_val);
     }

}
/* ********************************************************
 * Detect LPF RC IR singals
 * ******************************************************** */
void DetectPFRC()
{
     byte xstatus, nbytes;
     byte I2C_get_buf[];
     ArrayBuild(I2C_get_buf, I2C_DEVICE, CONTROL_FIELD);
     ArrayInit(I2C_buf, 0, 8);
     
     while(LowspeedCheckStatus(IRRECV_PORT) == STAT_COMM_PENDING);
     LowspeedWrite(IRRECV_PORT, 8, I2C_get_buf);
     
     while(LowspeedStatus(IRRECV_PORT, nbytes) == STAT_COMM_PENDING);
     xstatus = LowspeedRead(IRRECV_PORT, nbytes, I2C_buf);
     Wait(50);
     
     DisplayMotorCtrl();
}

/* ********************************************************
 * Initialize I2C sensor
 * ******************************************************** */
void I2C_Init()
{
     SetInput(IRRECV_PORT, InvalidData, true);
     SetSensorLowspeed(IRRECV_PORT);
     while (SensorInvalid(IRRECV_PORT));
}
/* ********************************************************
 * main routine
 * ******************************************************** */
task main()
{
     I2C_Init();
     
     ClearScreen();
     TextOut(0, LCD_LINE3, "Here is IRRecv  " );
     TextOut(0, LCD_LINE8, "Enter to detect " );
     until (ButtonPressed(BTNCENTER, TRUE));
     
     while(TRUE) DetectPFRC();
}