Adding vignetting correction module

    parameter SENSIO_STATUS_REG_REL =     1,     // 4 locations" 'h21, 'h23, 'h25, 'h27

    parameter SENSOR_NUM_HISTOGRAM=       3,     // number of histogram channels

    parameter HISTOGRAM_RAM_MODE =        "NOBUF", // valid: "NOBUF" (32-bits, no buffering), "BUF18", "BUF32"

    parameter SENS_GAMMA_NUM_CHN =        3,     // number of subchannels for his sensor ports (1..4)

    parameter SENS_NUM_SUBCHN =           3,     // number of subchannels for his sensor ports (1..4)

    parameter SENS_GAMMA_BUFFER =         0,     // 1 - use "shadow" table for clean switching, 0 - single table per channel

    // parameters defining address map

        parameter SENS_GAMMA_MODE_REPET =  4,

        parameter SENS_GAMMA_MODE_TRIG =   5,

    parameter SENSIO_RADDR =          8, //'h308  .. 'h30c

// Vignetting correction / pixel value scaling - controlled via single data word (same as in 252), some of bits [23:16]

// are used to select register, bits 25:24 - select sub-frame

    parameter SENS_LENS_RADDR =             'h3c, 

    parameter SENS_LENS_ADDR_MASK =         'h7fc,

    parameter SENS_LENS_COEFF =             'h3, // set vignetting/scale coefficients (

      parameter SENS_LENS_AX =              'h00, // 00000...

      parameter SENS_LENS_AX_MASK =         'hf8,

      parameter SENS_LENS_AY =              'h08, // 00001...

      parameter SENS_LENS_AY_MASK =         'hf8,

      parameter SENS_LENS_C =               'h10, // 00010...

      parameter SENS_LENS_C_MASK =          'hf8,

      parameter SENS_LENS_BX =              'h20, // 001.....

      parameter SENS_LENS_BX_MASK =         'he0,

      parameter SENS_LENS_BY =              'h40, // 010.....

      parameter SENS_LENS_BY_MASK =         'he0,

      parameter SENS_LENS_SCALES =          'h60, // 01100...

      parameter SENS_LENS_SCALES_MASK =     'hf8,

      parameter SENS_LENS_FAT0_IN =         'h68, // 01101000

      parameter SENS_LENS_FAT0_IN_MASK =    'hff,

      parameter SENS_LENS_FAT0_OUT =        'h69, // 01101001

      parameter SENS_LENS_FAT0_OUT_MASK =   'hff,

      parameter SENS_LENS_POST_SCALE =      'h6a, // 01101010

      parameter SENS_LENS_POST_SCALE_MASK = 'hff,

    parameter SENSIO_RADDR =               8, //'h408  .. 'h40f

    parameter SENSIO_ADDR_MASK =       'h7f8,

      // sens_parallel12 registers

      parameter SENSIO_CTRL =           'h0,

      parameter SENSIO_DELAYS =         'h4, // 'h4..'h7

        // 4 of 8-bit delays per register

    // sensor_i2c_io command/data write registers s (relative to SENSOR_GROUP_ADDR)

    parameter SENSI2C_ABS_RADDR =       'h10, // 'h310..'h31f

    parameter SENSI2C_REL_RADDR =       'h20, // 'h320..'h32f

    parameter SENSI2C_ABS_RADDR =       'h10, // 'h410..'h41f

    parameter SENSI2C_REL_RADDR =       'h20, // 'h420..'h42f

    parameter SENSI2C_ADDR_MASK =       'h7f0, // both for SENSI2C_ABS_ADDR and SENSI2C_REL_ADDR

    // sens_hist registers (relative to SENSOR_GROUP_ADDR)