ad6620.h

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/*! \file ad6620.h \brief Analog Devices AD6620 Digital Receiver Driver. */
//*****************************************************************************
//
// File Name    : 'ad6620.h'
// Title        : Analog Devices AD6620 Digital Receiver Driver
// Author       : Pascal Stang - Copyright (C) 2004
// Created      : 2004.07.08
// Revised      : 2004.07.12
// Version      : 0.1
// Target MCU   : ARM processors
// Editor Tabs  : 4
//
// NOTE: This code is currently below version 1.0, and therefore is considered
// to be lacking in some functionality or documentation, or may not be fully
// tested.  Nonetheless, you can expect most functions to work.
//
// This code is distributed under the GNU Public License
//      which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#ifndef AD6620_H
#define AD6620_H

#include "global.h"

// defines

// hardware
#define AD6620_REFCLK_FREQ      50000000l
/*#define AD6620_IO_UPDATE      P04
#define AD6620_RESET            P05
*/

// base address
#define AD6620_REG_BASE         0x81000200

// external interface registers
#define AD6620_REG_DR0          0x00
#define AD6620_REG_DR1          0x01
#define AD6620_REG_DR2          0x02
#define AD6620_REG_DR3          0x03
#define AD6620_REG_DR4          0x04
#define AD6620_REG_LAR          0x06
#define AD6620_REG_AMR          0x07

// internal registers and RAM
#define AD6620_REG_RCF_COEFF    0x000
#define AD6620_REG_RCF_DATA     0x100
#define AD6620_REG_MODE_CTRL    0x300
#define AD6620_REG_NCO_CTRL     0x301
#define AD6620_REG_NCO_SYNC     0x302
#define AD6620_REG_NCO_FREQ     0x303
#define AD6620_REG_NCO_PHASE    0x304

#define AD6620_REG_CIC2_SCALE   0x305
#define AD6620_REG_CIC2_DECIM   0x306

#define AD6620_REG_CIC5_SCALE   0x307
#define AD6620_REG_CIC5_DECIM   0x308

#define AD6620_REG_RCF_CTRL     0x309
#define AD6620_REG_RCF_DECIM    0x30A
#define AD6620_REG_RCFADDR_OFS  0x30B
#define AD6620_REG_RCF_TAPS     0x30C

#define AD6620_REG_RESERVED     0x30D

// register values
#define AD6620_NCO_BYPASS       0x01
#define AD6620_NCO_PHASE_DITHER 0x02
#define AD6620_NCO_AMPL_DITHER  0x04

void ad6620Init(void);

u32 ad6620ReadReg(u16 reg);
void ad6620WriteReg(u16 reg, u32 data);
void ad6620SetNCOMode(u08 mode);
void ad6620SetNCOFreq(u32 freqHz);
void ad6620SetNCOPhase(u16 phase);
void ad6620LoadRCFilter(int start, int taps, s32* coeffs);

void ad6620ShowRegisters(void);


#endif

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