+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
- *
- * -->
- *
- * \brief Function library for AT45DBXX Data Flash memory.
- *
- *
- * \version $Id: dflash.c 15379 2007-03-28 15:46:09Z asterix $
- * \author Daniele Basile <asterix@develer.com>
- */
-
-
-#include <appconfig.h>
-
-#include <avr/io.h>
-#include <cfg/macros.h>
-#include <cfg/debug.h>
-#include <cfg/module.h>
-#include <drv/timer.h>
-#include <drv/spi.h>
-#include <drv/dflash.h>
-
-#include "hw_spi.h"
-
-/**
- * Send a generic command to data flash memory.
- * This function send only 4 byte, for opcode, page address and
- * byte address.
- */
-static void send_cmd(dflashAddr_t page_addr, dflashAddr_t byte_addr, DFlashOpcode opcode)
-{
-
- /*
- * Make sure to toggle CS signal in order,
- * and reset dflash command decoder.
- *
- * Note:
- * #define CS_TOGGLE() \
- * CS_DISABLE(); \
- * CS_ENABLE(); \
- */
- CS_TOGGLE();
-
-
- /*
- * To send one command to data flash memory, we send 4 byte.
- * First byte is opcode command, second and third byte are
- * page address, in last byte we write a byte page address.
- * (see datasheet for more detail).
- *
- * \note Generaly a defaul memory page size is more than 256 byte.
- * In this case we need for addressing a byte in one page more than
- * 8 bit, so we put in fourth byte low part of address byte, and
- * hight part of address byte in third byte togheter low par of page
- * address.
- *
- * \{
- */
-
- /*
- * Send opcode.
- */
- spi_sendRecv(opcode);
-
- /*
- * Send page address.
- * \{
- */
- spi_sendRecv((uint8_t)(page_addr >> (16 - DFLASH_PAGE_ADDRESS_BIT)));
- spi_sendRecv((uint8_t)((page_addr << (DFLASH_PAGE_ADDRESS_BIT - 8)) + (byte_addr >> 8)));
- /*\}*/
-
- /*
- * Send byte page address.
- */
- spi_sendRecv((uint8_t)byte_addr);
-
- /* \} */
-
-}
-
-/**
- * Reset dataflash memory function.
- *
- * This function reset data flash memory
- * with one pulse reset long about 10usec.
- *
- */
-static void dflash_reset(void)
-{
- CS_ENABLE();
- RESET_ENABLE();
- timer_delayHp(us_to_hptime(RESET_PULSE_WIDTH));
- CS_DISABLE();
- RESET_DISABLE();
- timer_delayHp(us_to_hptime(RESET_PULSE_WIDTH));
-}
-
-/**
- * dflash init function.
- * This function initialize a micro pin and
- * SPI driver, and test if data flash memory
- * density is the same wich define in dflash.h.
- */
-MOD_DEFINE(dflash);
-static bool dflash_pin_init(void)
-{
- uint8_t stat;
-
- MOD_CHECK(spi);
-
- RESET_DISABLE();
- WRITE_ENABLE(); //pilot wp pin.
-
- RESET_OUT();
- WP_OUT();
-
- dflash_reset();
-
- stat = dflash_stat();
-
- MOD_INIT(dflash);
-
- /*
- * 2,3,4,5 bit of 1 byte status register
- * indicate a device density of dflash memory
- * (see datasheet for more detail.)
- */
- GET_ID_DESITY_DEVICE(stat);
-
- if(stat == DFLASH_ID_DEVICE_DENSITY)
- return true;
- else
- return false;
-
-}
-
-
-/**
- * Read status register of dataflah memory.
- *
- */
-static uint8_t dflash_stat(void)
-{
- uint8_t stat;
-
- /*
- * Make sure to toggle CS signal in order,
- * and reset dflash command decoder.
- * \{
- */
- CS_TOGGLE();
-
- stat = spi_sendRecv(DFO_READ_STATUS);
- stat = spi_sendRecv(0x00);
-
- return stat;
-}
-
-
-/**
- * Send one command to data flash memory, and
- * return status register value.
- *
- */
-static uint8_t dflash_cmd(dflashAddr_t page_addr, dflashAddr_t byte_addr, DFlashOpcode opcode)
-{
-
- send_cmd(page_addr, byte_addr, opcode);
-
- CS_DISABLE();
- CS_ENABLE();
-
- /*
- * We chech data flash memory state, and wait until busy-flag
- * is hight.
- */
- while(!(dflash_stat() & BUSY_BIT));
-
- return (dflash_stat());
-
-}
-
-/**
- * Read one byte from main data flash memory or buffer data
- * flash memory.
- */
-static uint8_t dflash_read_byte(dflashAddr_t page_addr, dflashAddr_t byte_addr, DFlashOpcode opcode)
-{
- uint8_t data;
-
- send_cmd(page_addr, byte_addr, opcode);
-
-#if CONFIG_DATA_FLASH == AT45DB041B
- if(opcode == DFO_READ_FLASH_MEM_BYTE)
- {
- /*
- * Send 24 don't care bit.
- * \{
- */
- spi_sendRecv(0x00);
- spi_sendRecv(0x00);
- spi_sendRecv(0x00);
- /* \} */
-
- }
-#endif
-
- spi_sendRecv(0x00); //Send 8 don't care bit.
- data = spi_sendRecv(0x00); //Read byte.
- CS_DISABLE();
-
- return data;
-}
-
-/**
- * Read \a len bytes from main data flash memory or buffer data
- * flash memory, and put it in \a *block.
- */
-static void dflash_read_block(dflashAddr_t page_addr, dflashAddr_t byte_addr, DFlashOpcode opcode, uint8_t *block, dflashSize_t len)
-{
-
- send_cmd(page_addr, byte_addr, opcode);
-
- if(opcode == DFO_READ_FLASH_MEM_BYTE)
- {
- /*
- * Send 24 don't care bit.
- * \{
- */
- spi_sendRecv(0x00);
- spi_sendRecv(0x00);
- spi_sendRecv(0x00);
- /* \} */
- }
-
- spi_sendRecv(0x00); //Send 8 don't care bit.
- spi_read(block, len); //Read len bytes ad put in block buffer.
-
-
- CS_DISABLE();
-
-}
-
-
-/**
- * Write \a len bytes in buffer buffer data flash memory.
- *
- * \note Isn't possible to write bytes directly in main memory data
- * flash. To perform write in main memory you must before write in buffer
- * data flash memory, an then send command to write page in main memory.
- */
-static void dflash_write_block(dflashAddr_t byte_addr, DFlashOpcode opcode, uint8_t *block, dflashSize_t len)
-{
-
- send_cmd(0x00, byte_addr, opcode);
-
- spi_write(block, len); //Write len bytes.
-
- CS_DISABLE();
-
-}
-
-/* Kfile interface section */
-
-/**
- * Open data flash file \a fd
- * \a name and \a mode are unused, cause flash memory is
- * threated like one file.
- */
-static bool dflash_open(struct _KFile *fd, UNUSED_ARG(const char *, name), UNUSED_ARG(int, mode))
-{
-}
-
-/**
- * Close file \a fd
- */
-static bool dflash_close(UNUSED_ARG(struct _KFile *,fd))
-{
-}
-
-/**
- * Move \a fd file seek position of \a offset bytes
- * from current position.
- */
-static int32_t dflash_seek(struct _KFile *fd, int32_t offset, KSeekMode whence)
-{
-}
-
-/**
- * Read from file \a fd \a size bytes and put it in buffer \a buf
- * \return the number of bytes read.
- */
-static size_t dflash_read(struct _KFile *fd, void *buf, size_t size)
-{
-}
-
-/**
- * Init data flash memory interface.
- */
-void dflash_init(struct _KFile *fd)
-{
- // Set up data flash programming functions.
- fd->open = dflash_open;
- fd->close = dflash_close;
- fd->read = dflash_read;
- fd->write = dflash_write;
- fd->seek = dflash_seek;
-
- // Init data flash memory and micro pin.
- ASSERT(dflash_pin_init());
-}
\ No newline at end of file
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