operations.h

/***
 * SoftRock USB I2C host control program
 * Copyright (C) 2009 Andrew Nilsson (andrew.nilsson@gmail.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Based on powerSwitch.c by Christian Starkjohann,
 * and usbtemp.c by Mathias Dalheimer
 * of Objective Development Software GmbH (2005)
 * (see http://www.obdev.at/avrusb)
 */

/*
   General Description:
   This program queries and controls the AVR Si570 hardware.
   It must be linked with libusb, a library for accessing the USB bus from
   Linux, FreeBSD, Mac OS X and other Unix operating systems. Libusb can be
   obtained from http://libusb.sourceforge.net/.
 */

/* DG8SAQ specific values */
#define SI570_I2C_ADDR 0x55
#define SI570_DCO_HIGH 5670.0
#define SI570_DCO_LOW 4850.0
#define SI570_NOMINAL_XTALL_FREQ 114.285
#define SI570_XTALL_DEVIATION_PPM 2000
#define SI570_DEFAULT_STARTUP_FREQ	56.32

#define REQUEST_READ_VERSION			0x00
#define REQUEST_SET_DDRB			0x01
#define REQUEST_SET_PORTB			0x04
#define REQUEST_READ_EEPROM			0x11
#define REQUEST_FILTERS				0x17
#define REQUEST_SET_BPF_ADDRESS			0x18
#define REQUEST_READ_BPF_ADDRESS		0x19
#define REQUEST_SET_LPF_ADDRESS			0x1A
#define REQUEST_READ_LPF_ADDRESS		0x1B
#define REQUEST_SET_FREQ			0x30
#define REQUEST_SET_MULTIPLY_LO     0x31
#define REQUEST_SET_FREQ_BY_VALUE	0x32
#define REQUEST_SET_XTALL_FREQ		0x33
#define REQUEST_SET_STARTUP_FREQ	0x34
#define REQUEST_READ_MULTIPLY_LO	0x39	
#define REQUEST_READ_FREQUENCY		0x3A
#define REQUEST_READ_SMOOTH_TUNE_PPM    0x3B
#define REQUEST_READ_STARTUP		0x3C
#define REQUEST_READ_XTALL		0x3D
#define REQUEST_READ_REGISTERS		0x3F
//#define REQUEST_SET_STARTUP_FREQ	0x41
#define REQUEST_SET_PTT				0x50
#define REQUEST_READ_KEYS			0x51

struct solution {
	int HS_DIV;
	int N1;
	double f0;
	double RFREQ;
};

unsigned char usbOpenDevice(usb_dev_handle **device, int vendor, char *vendorName, int product, char *productName, char *usbSerialID);

void printBuffer(char * buffer, int length);

void calibrate(usb_dev_handle *handle);

double calculateFrequency(unsigned char * buffer);

unsigned short readVersion(usb_dev_handle *handle);

double readFrequencyByValue(usb_dev_handle *handle);

void getRegisters(usb_dev_handle *handle);

double getFrequency(usb_dev_handle *handle);

void setPTT(usb_dev_handle *handle, int value);

int calcDividers(double f, struct solution* solution);

void setFrequency(usb_dev_handle * handle, double frequency);

void setFreqByValue(usb_dev_handle * handle, double frequency);