#ifndef flash_h #define flash_h /* flash.h */ /* avr.modules - AVR modules. {{{ * * Copyright (C) 2008 NĂ©lio Laranjeiro * * APBTeam: * Web: http://apbteam.org/ * Email: team AT apbteam DOT org * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * }}} */ #include "common.h" #include "io.h" #define FLASH_SIZE 0x200000 #define FLASH_ADDRESS_HIGH (FLASH_SIZE - 1) #define FLASH_ADDRESS_ERROR 0xFFFFFF #define FLASH_ADDRESS_INC(val) \ ((val) + 1) & FLASH_ADDRESS_HIGH #define FLASH_ERASE_FULL 0x60 #define FLASH_ERASE_4K 0x20 #define FLASH_ERASE_32K 0x52 #define FLASH_ERASE_64K 0xD8 #define FLASH_READ_ID 0x9F #define FLASH_READ 0x03 #define FLASH_WRITE 0x2 #define FLASH_WRSR 0x1 #define FLASH_RDSR 0x5 #define FLASH_WREN 0x6 #define FLASH_WEDI 0x4 #define FLASH_EWSR 0x50 #define FLASH_AAI 0xAD #define FLASH_TBP_US 10 #define FLASH_LOG_PAGE_SIZE 0x80000 #define FLASH_LOG_BUFFER_SIZE 16 enum { FLASH_CMD_INIT, FLASH_CMD_READ, FLASH_CMD_WRITE, FLASH_CMD_READ_BYTE, FLASH_CMD_WRITE_BYTE, FLASH_CMD_NB }; /** Flash access. * The flash contains an address of 21 bits in a range from 0x0-0x1fffff. * This function shall access the memory directly by the SPI. * \param addr the address to provide to the flash memory. */ void flash_address (uint32_t addr); /** Erase the memory. * \param erase_type the erase type.. * \param start_addr the start address. */ void flash_erase (uint8_t cmd, uint32_t start_addr); /* Send a flash command to the flash memory (only a command). * \param cmd the command to send. */ void flash_send_command (uint8_t cmd); /** Poll the busy bit in the Software Status Register of the flash memory. * \return the status register. */ uint8_t flash_read_status (void); /** Poll the busy bit in the Software Status Register of the flash memory. * \return the busy bit state. */ extern inline uint8_t flash_is_busy (void) { return flash_read_status () & 0x1; } /** Return the AAI status flag of the register. * \return the AAI status. */ extern inline uint8_t flash_status_aai (void) { return flash_read_status () >> 6; } /** Initialise the flash memory. * \return true if the flash is present, false otherwise. */ uint8_t flash_init (void); /** Write in the flash byte provided in parameter. * \param data the buffer to store the data. */ void flash_write (uint32_t addr, uint8_t data); /** Read the data at the address provided. * \param addr the address of the data to read. * \return the data read. */ uint8_t flash_read (uint32_t addr); /** Read a data from the flash memory from the address provided and for a * length of the number of bytes provided. * \param address at which the data should be read. * \param buffer the buffer to fill with the read data. * \param length the length of the data to read. */ void flash_read_array (uint32_t addr, uint8_t *buffer, uint32_t length); /** Write in the flash byte provided in parameter. * \param addr the address to store the data. * \param data the array to store. * \param length the array length */ void flash_write_array (uint32_t addr, uint8_t *data, uint32_t length); /** Process the logs * \param size the number of arguments. * \param an array of arguments. * \return - 0 on success, * - 1 flash not initialised * - 2 flash read error. * - 3 command not found. */ int8_t flash_log (uint8_t size, uint8_t *args); #endif /* flash_h */