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/* Copyright 2020 Nick Brassel (tzarc)
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
/*
Default device configurations:
For the Adafruit SPI Non-Volatile FRAM Breakout: https://www.adafruit.com/product/1897
#define EEPROM_SPI_MB85RS64V
*/
#if defined(EEPROM_SPI_MB85RS64V)
# define EXTERNAL_EEPROM_BYTE_COUNT 8192
# define EXTERNAL_EEPROM_PAGE_SIZE 64 // it's FRAM, so it doesn't actually matter, this just sets the RAM buffer
# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
#endif
/*
The slave select pin of the EEPROM.
This needs to be a normal GPIO pin_t value, such as A7.
*/
#ifndef EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN
# error "No chip select pin defined -- missing EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN"
#endif
/*
The clock divisor for SPI to ensure that the MCU is within the
specifications of the EEPROM chip. Generally this will be PCLK divided by
the intended divisor -- check your clock settings and the datasheet of
your EEPROM.
*/
#ifndef EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR
# ifdef __AVR__
# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8
# else
# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 64
# endif
#endif
/*
The SPI mode to communicate with the EEPROM.
*/
#ifndef EXTERNAL_EEPROM_SPI_MODE
# define EXTERNAL_EEPROM_SPI_MODE 0
#endif
/*
Whether or not the SPI communication between the MCU and EEPROM should be
LSB-first.
*/
#ifndef EXTERNAL_EEPROM_SPI_LSBFIRST
# define EXTERNAL_EEPROM_SPI_LSBFIRST false
#endif
/*
The total size of the EEPROM, in bytes. The EEPROM datasheet will usually
specify this value in kbits, and will require conversion to bytes.
*/
#ifndef EXTERNAL_EEPROM_BYTE_COUNT
# define EXTERNAL_EEPROM_BYTE_COUNT 8192
#endif
/*
The page size in bytes of the EEPROM, as specified in the datasheet.
*/
#ifndef EXTERNAL_EEPROM_PAGE_SIZE
# define EXTERNAL_EEPROM_PAGE_SIZE 32
#endif
/*
The address size in bytes of the EEPROM. For EEPROMs with <=256 bytes, this
will likely be 1. For EEPROMs >256 and <=65536, this will be 2. For EEPROMs
>65536, this will likely need to be 4.
As expected, consult the datasheet for specifics of your EEPROM.
*/
#ifndef EXTERNAL_EEPROM_ADDRESS_SIZE
# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
#endif
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