81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* Copyright 2020 Nick Brassel (tzarc)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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/*
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The slave select pin of the EEPROM.
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This needs to be a normal GPIO pin_t value, such as A7.
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*/
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#ifndef EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN
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# error "No chip select pin defined -- missing EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN"
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#endif
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/*
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The clock divisor for SPI to ensure that the MCU is within the
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specifications of the EEPROM chip. Generally this will be PCLK divided by
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the intended divisor -- check your clock settings and the datasheet of
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your EEPROM.
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*/
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#ifndef EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR
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# ifdef __AVR__
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# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8
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# else
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# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 64
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# endif
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#endif
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/*
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The SPI mode to communicate with the EEPROM.
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*/
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#ifndef EXTERNAL_EEPROM_SPI_MODE
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# define EXTERNAL_EEPROM_SPI_MODE 0
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#endif
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/*
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Whether or not the SPI communication between the MCU and EEPROM should be
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LSB-first.
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*/
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#ifndef EXTERNAL_EEPROM_SPI_LSBFIRST
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# define EXTERNAL_EEPROM_SPI_LSBFIRST false
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#endif
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/*
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The total size of the EEPROM, in bytes. The EEPROM datasheet will usually
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specify this value in kbits, and will require conversion to bytes.
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*/
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#ifndef EXTERNAL_EEPROM_BYTE_COUNT
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# define EXTERNAL_EEPROM_BYTE_COUNT 8192
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#endif
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/*
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The page size in bytes of the EEPROM, as specified in the datasheet.
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*/
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#ifndef EXTERNAL_EEPROM_PAGE_SIZE
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# define EXTERNAL_EEPROM_PAGE_SIZE 32
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#endif
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/*
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The address size in bytes of the EEPROM. For EEPROMs with <=256 bytes, this
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will likely be 1. For EEPROMs >256 and <=65536, this will be 2. For EEPROMs
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>65536, this will likely need to be 4.
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As expected, consult the datasheet for specifics of your EEPROM.
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*/
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#ifndef EXTERNAL_EEPROM_ADDRESS_SIZE
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# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
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#endif
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