From d13ada11622977bcc0b530212b4405229805016d Mon Sep 17 00:00:00 2001 From: Nick Brassel Date: Wed, 6 Nov 2019 08:04:50 +1100 Subject: Add customisable EEPROM driver selection (#7274) - uprintf -> dprintf - Fix atsam "vendor" eeprom. - Bump Kinetis K20x to 64 bytes, too. - Rollback Kinetis to 32 bytes as partitioning can only be done once. Add warning about changing the value. - Change RAM-backed "fake" EEPROM implementations to match eeconfig's current usage. - Add 24LC128 by request. --- drivers/eeprom/eeprom_transient.c | 52 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 drivers/eeprom/eeprom_transient.c (limited to 'drivers/eeprom/eeprom_transient.c') diff --git a/drivers/eeprom/eeprom_transient.c b/drivers/eeprom/eeprom_transient.c new file mode 100644 index 0000000000..b4c78c6f40 --- /dev/null +++ b/drivers/eeprom/eeprom_transient.c @@ -0,0 +1,52 @@ +/* Copyright 2019 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 . + */ + +#include +#include + +#include "eeprom_driver.h" +#include "eeprom_transient.h" + +__attribute__((aligned(4))) static uint8_t transientBuffer[TRANSIENT_EEPROM_SIZE] = {0}; + +size_t clamp_length(intptr_t offset, size_t len) { + if (offset + len > TRANSIENT_EEPROM_SIZE) { + len = TRANSIENT_EEPROM_SIZE - offset; + } + + return len; +} + +void eeprom_driver_init(void) { eeprom_driver_erase(); } + +void eeprom_driver_erase(void) { memset(transientBuffer, 0x00, TRANSIENT_EEPROM_SIZE); } + +void eeprom_read_block(void *buf, const void *addr, size_t len) { + intptr_t offset = (intptr_t)addr; + memset(buf, 0x00, len); + len = clamp_length(offset, len); + if (len > 0) { + memcpy(buf, &transientBuffer[offset], len); + } +} + +void eeprom_write_block(const void *buf, void *addr, size_t len) { + intptr_t offset = (intptr_t)addr; + len = clamp_length(offset, len); + if (len > 0) { + memcpy(&transientBuffer[offset], buf, len); + } +} -- cgit v1.2.3