eeprom.h

/*
--------------------------------------------------------------------------------
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
Boston, MA  02110-1301, USA.
--------------------------------------------------------------------------------
*/

// Copyright (c) 2016 John Seamons, ZL4VO/KF6VO

#pragma once

#include "kiwi.h"
#include "peri.h"

#define EEPROM_KEY_LEN 29
#define EEPROM_KEY_PAD 32

struct eeprom_t {
	#define	EE_HEADER	0xAA5533EE
	u4_t header;                // 0x00
	
	#define	EE_FMT_REV	"A1"
	char fmt_rev[2];            // 0x04
	
	char board_name[32];        // 0x06
	char version[4];            // 0x26
	char mfg[16];               // 0x2a
	char part_no[16];           // 0x3a
	char week[2];               // 0x4a
	char year[2];               // 0x4c
	
	union {
	    struct {
            char assembly[4];   // 0x4e
            char serial_old[4]; // 0x52
        };
        char serial_new[8];     // 0x4e
    };
	
	u2_t n_pins;                // 0x56
	u2_t io_pins[EE_NPINS];     // 0x58
	
	#define	EE_MA_3V3	250
	#define	EE_MA_5INT	0
	#define	EE_MA_5EXT	0
	#define	EE_MA_DC	1500
	u2_t mA_3v3;                // 0xec
	u2_t mA_5int;               // 0xee
	u2_t mA_5ext;               // 0xf0
	u2_t mA_DC;                 // 0xf2
	
	u1_t unused[12];            // 0xf4 - 0xff
	
	char serial_backup[4][8];
	char key[4][EEPROM_KEY_PAD];
} __attribute__((packed));

extern eeprom_t eeprom;

//#define TEST_FLAG_EEPROM
#ifdef TEST_FLAG_EEPROM
    void eeprom_test();
#else
    #define eeprom_test()
#endif

typedef enum { EE_SERNO_READ, EE_SERNO_WRITE, EE_SERNO_ALLOC, EE_NORM, EE_RESET, EE_FIX, EE_TEST } eeprom_action_e;

int eeprom_next_serno(eeprom_action_e action, int set_serno);
int eeprom_check(model_e *model, bool *old_model_fmt = NULL);
void eeprom_write(eeprom_action_e action, int serno, int model, char *key = NULL);
void eeprom_update(eeprom_action_e action);