# TP_CalcCalibrateParam

## Syntax

  `#include <nitro/spi.h>`

      u32 TP_CalcCalibrateParam( TPCalibrateParam * calibrate,
                                      u16 raw_x1, u16 raw_y1,
                                      u16 dx1,   u16 dy1,
                                      u16 raw_x2, u16 raw_y2,
                                      u16 dx2,   u16 dy2 );

## Arguments

calibrate | Pointer used for storing the results of the calibration parameters
raw_x1, raw_y1 | Raw touch panel values acquired at coordinate 1 (0 – 4095)
dx1, dy1 | Screen coordinates for coordinate 1
raw_x2, raw_y2 | Raw touch panel values acquired at coordinate 2 (0 – 4095)
dx2, dy2 | Screen coordinates for coordinate 2

## Return Values

If the arguments are valid parameters, returns 0. If they are not valid parameters, it returns a non-zero value.

## Description

This function calculates calibration parameters that are based on coordinates of two points.

Do not use the same x or y values as parameters for coordinates 1 and 2.

## See Also

`TP_GetCalibratedPoint, TP_SetCalibrateParam`

## Revision History

2004/04/16 Initial version.

CONFIDENTIAL