+++ /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: dataflash.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/dataflash.h>
-
-#include "hw_spi.h"
-
-
-/**
- * Global variable for store current and previous data
- * flash memory page address during operation of writing.
- */
-static dataflash_t previous_page = 0;
-static bool page_modified = false;
-
-
-/**
- * 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(dataflash_t page_addr, dataflashOffset_t byte_addr, DataFlashOpcode opcode)
-{
-
- /*
- * Make sure to toggle CS signal in order,
- * and reset dataflash command decoder.
- *
- * \note This is equivalent to CS_DISABLE() immediately followed by 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 - DATAFLASH_PAGE_ADDRESS_BIT)));
- spi_sendRecv((uint8_t)((page_addr << (DATAFLASH_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 dataflash_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));
-}
-
-/**
- * dataflash init function.
- * This function initialize a micro pin and
- * SPI driver, and test if data flash memory
- * density is the same wich define in dataflash.h.
- */
-MOD_DEFINE(dataflash);
-static bool dataflash_pin_init(void)
-{
- uint8_t stat;
-
- MOD_CHECK(spi);
-
- RESET_DISABLE();
- WRITE_ENABLE(); //pilot wp pin.
-
- RESET_OUT();
- WP_OUT();
-
- dataflash_reset();
-
- stat = dataflash_stat();
-
- MOD_INIT(dataflash);
-
- /*
- * 2,3,4,5 bits of 1 byte status register
- * indicate a device density of dataflash memory
- * (see datasheet for more detail.)
- */
- GET_ID_DESITY_DEVICE(stat);
-
- if(stat == DATAFLASH_ID_DEVICE_DENSITY)
- return true;
- else
- return false;
-
-}
-
-
-/**
- * Read status register of dataflah memory.
- *
- */
-static uint8_t dataflash_stat(void)
-{
- uint8_t stat;
-
- /*
- * Make sure to toggle CS signal in order,
- * and reset dataflash command decoder.
- */
- CS_TOGGLE();
-
- stat = spi_sendRecv(DFO_READ_STATUS);
- stat = spi_sendRecv(0x00);
-
- /*
- * Note: this function could be call one more time
- * to check register status (es. check if memory has been
- * teminate one operation), and so we don't disable CS to
- * allow fast reading of register status.
- */
- return stat;
-}
-
-
-/**
- * Send one command to data flash memory, and
- * return status register value.
- *
- */
-static uint8_t dataflash_cmd(dataflash_t page_addr, dataflashOffset_t byte_addr, DataFlashOpcode opcode)
-{
-
- uint8_t stat;
-
- send_cmd(page_addr, byte_addr, opcode);
-
- CS_TOGGLE();
-
- /*
- * We chech data flash memory state, and wait until busy-flag
- * is hight.
- */
- while(!(dataflash_stat() & BUSY_BIT));
-
- stat = dataflash_stat();
-
- /*
- * Data flash has been terminate a sent command, and so
- * disable CS.
- */
- CS_DISABLE();
-
- return (stat);
-
-}
-
-/**
- * Read one byte from main data flash memory or buffer data
- * flash memory.
- */
-static uint8_t dataflash_read_byte(dataflash_t page_addr, dataflashOffset_t byte_addr, DataFlashOpcode opcode)
-{
- uint8_t data;
-
- send_cmd(page_addr, byte_addr, opcode);
-
-#if CONFIG_DATA_FLASH == DATAFLASH_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 dataflash_read_block(dataflash_t page_addr, dataflashOffset_t byte_addr, DataFlashOpcode opcode, uint8_t *block, dataflashSize_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 dataflash_write_block(dataflashOffset_t byte_addr, DataFlashOpcode opcode, uint8_t *block, dataflashSize_t len)
-{
-
- send_cmd(0x00, byte_addr, opcode);
-
- spi_write(block, len); //Write len bytes.
-
- CS_DISABLE();
-
-}
-
-
-/**
- * Load selct page from dataflash memory to buffer.
- */
-static void dataflash_loadPage(dataflash_t page_addr)
-{
- dataflash_cmd(page_addr, 0x00, DFO_MOV_MEM_TO_BUFF1);
-}
-
-/**
- * Flush select page (stored in buffer) in data flash main memory page.
- */
-void dataflash_flush(void)
-{
- if (page_modified)
- {
- dataflash_cmd(previous_page, 0x00, DFO_WRITE_BUFF1_TO_MEM_E);
-
- page_modified = false;
-
- kprintf("\n::=> Flush page:... <%ld>\n", previous_page);
- }
-}
-
-/* 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 dataflash_open(struct _KFile *fd, UNUSED_ARG(const char *, name), UNUSED_ARG(int, mode))
-{
- MOD_CHECK(dataflash);
-
- previous_page = 0;
- fd->seek_pos = 0;
- fd->size = (dataflashAddr_t)DATAFLASH_PAGE_SIZE * (dataflashAddr_t)DATAFLASH_NUM_PAGE;
-
- /* Load select page memory from data flash memory*/
- dataflash_loadPage(previous_page);
-
- kprintf("dataflash file opened\n");
- return true;
-}
-
-/**
- * Close file \a fd
- */
-static bool dataflash_close(UNUSED_ARG(struct _KFile *,fd))
-{
- dataflash_flush();
- kprintf("dataflash file closed\n");
- return true;
-}
-
-/**
- * Move \a fd file seek position of \a offset bytes
- * from current position.
- */
-static int32_t dataflash_seek(struct _KFile *fd, int32_t offset, KSeekMode whence)
-{
- uint32_t seek_pos;
-
- switch(whence)
- {
- case KSM_SEEK_SET:
- seek_pos = 0;
- break;
- case KSM_SEEK_END:
- seek_pos = fd->size - 1;
- break;
- case KSM_SEEK_CUR:
- seek_pos = fd->seek_pos;
- break;
- default:
- ASSERT(0);
- return -1;
- break;
- }
-
- /* Bound check */
- if (seek_pos + offset > fd->size)
- {
- ASSERT(0);
- return -1;
- }
-
- fd->seek_pos = seek_pos + offset;
- kprintf("Flash seek to [%u]\n", fd->seek_pos);
-
- return fd->seek_pos;
-}
-
-/**
- * Read from file \a fd \a size bytes and put it in buffer \a buf
- * \return the number of bytes read.
- */
-static size_t dataflash_read(struct _KFile *fd, void *buf, size_t size)
-{
- dataflashOffset_t byte_addr;
- dataflashAddr_t page_addr;
- uin8_t *data = (uint8_t *)buf;
-
-
- ASSERT(fd->seek_pos + size <= fd->size);
- size = MIN((uint32_t)size, fd->size - fd->seek_pos);
-
- kprintf("Reading at pos[%u]\n", fd->seek_pos);
-
- /*
- * We select from absolute address page address
- * and byte address in page.
- */
- page_addr = fd->seek_pos / (dataflashAddr_t)DATAFLASH_PAGE_SIZE;
- byte_addr = fd->seek_pos % (dataflashAddr_t)DATAFLASH_PAGE_SIZE;
-
-
- kprintf(" [page-<%ld>, byte-<%ld>]", page_addr, byte_addr);
-
- /*
- * Flush current page in main memory if
- * we had been written a byte in memory
- */
- dataflash_flush();
-
- /*
- * Read byte in main page data flash memory.
- */
- dataflash_read_block(page_addr, byte_addr, DFO_READ_FLASH_MEM_BYTE, data, size);
-
- fd->seek_pos += size;
- kprintf(" ::=> Read data: %02x\n",data);
-
- return size;
-}
-
-/**
- * Write program memory.
- * Write \a size bytes from buffer \a _buf to file \a fd
- * \note Write operations are buffered.
- */
-static size_t dataflash_write(struct _KFile *fd, const void *_buf, size_t size)
-{
-
- dataflashOffset_t byte_addr;
- dataflashAddr_t current_page;
-
- uint8_t *data = (uint8_t *) _buf;
-
- ASSERT(fd->seek_pos + size <= fd->size);
- size = MIN((uint32_t)size, fd->size - fd->seek_pos);
-
- kprintf("Writing at pos[%u]\n", fd->seek_pos);
-
- while (size)
- {
- /*
- * We select from absolute address page address
- * and byte address in page.
- */
- current_page = fd->seek_pos / (dataflashAddr_t)DATAFLASH_PAGE_SIZE;
- byte_addr = fd->seek_pos % (dataflashAddr_t)DATAFLASH_PAGE_SIZE;
-
-
- size_t wr_len = MIN(size, DATAFLASH_PAGE_SIZE - byte_addr);
-
- kprintf(" [page-<%ld>, byte-<%ld>]",current_page, byte_addr);
-
- if (current_page != previous_page)
- {
- /* Flush current page in main memory*/
- dataflash_flush();
- /* Load select page memory from data flash memory*/
- dataflash_loadPage(current_page);
-
- previous_page = current_page;
- kprintf(" >> Load page: <%ld> ",current_page);
- }
- /*
- * Write byte in current page, and set true
- * page_modified flag.
- */
- dataflash_write_byte(byte_addr, DFO_WRITE_BUFF1, data);
- page_modified = true;
-
-
- data += wr_len;
- fd->seek_pos += wr_len;
- size -= wr_len;
- total_write += wr_len;
- }
-
- kprintf("written %u bytes\n", total_write);
- return total_write;
-}
-
-/**
- * Init data flash memory interface.
- */
-void dataflash_init(struct _KFile *fd)
-{
- // Set up data flash programming functions.
- fd->open = dataflash_open;
- fd->close = dataflash_close;
- fd->read = dataflash_read;
- fd->write = dataflash_write;
- fd->seek = dataflash_seek;
-
- // Init data flash memory and micro pin.
- ASSERT(dataflash_pin_init());
-}
-
-/**
- * Test function for dataflash.
- *
- * This function test check low level driver for
- * AT45xx (see dataflash.h for more info) data flash memory.
- * We write a string in memory in some page ad read it.
- */
-void dataflash_test(void)
-{
- KFile fd;
-
- dataflash_init(&fd);
-
- uint8_t test_buf[] = "0123456789 Develer s.r.l.";
- uint8_t cmp_buf[];
-
- kprintf("\n======= Data Flash test function =========================================\n");
- kprintf("\nThe string test is: %s\n\n", test_buf);
-
- fd.open(&fd, NULL, 0);
-
- /* TEST 1 */
-
- // Seek to addr 0
- if (fd.seek(&fd, 0, SEEK_SET) != 0)
- goto dataflash_test_end;
-
- // Test flash write to address 0 (page 0)
- if (!fd->write(&fd, test_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Seek to addr 0
- if (fd.seek(&fd, 0, SEEK_SET) != 0)
- goto dataflash_test_end;
-
- // Test flash read to address 0 (page 0)
- if (!fd->read(&fd, cmp_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Compare if are egual.
- if ((memcmp(cmp_buf,test_buf, sizeof(test_buf)) == 0)
- goto dataflash_test_end;
-
- /* TEST 2 */
-
- // Go to middle address memory.
- fd.seek(&fd, (((dataflashAddr_t)DFLASH_PAGE_SIZE * (dataflashAddr_t)DFLASH_NUM_PAGE) / 2), SEEK_CUR);
-
- // Test flash write at the middle of memory
- if (!fd->write(&fd, test_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Go to middle address memory.
- fd.seek(&fd, (((dataflashAddr_t)DFLASH_PAGE_SIZE * (dataflashAddr_t)DFLASH_NUM_PAGE) / 2), SEEK_CUR);
-
- // Test flash read at the middle of memory
- if (!fd->read(&fd, cmp_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Compare if are egual.
- if ((memcmp(cmp_buf,test_buf, sizeof(test_buf)) == 0)
- goto dataflash_test_end;
-
- /* TEST 3 */
-
- // Go to end of data flash.
- fd.seek(&fd, ((dataflashAddr_t)DFLASH_PAGE_SIZE * (dataflashAddr_t)DFLASH_NUM_PAGE) - sizeof(test_buf), SEEK_END);
-
- // Test flash write at the end of memory
- if (!fd->write(&fd, test_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Go to end of data flash.
- fd.seek(&fd, ((dataflashAddr_t)DFLASH_PAGE_SIZE * (dataflashAddr_t)DFLASH_NUM_PAGE) - sizeof(test_buf), SEEK_END);
-
- // Test flash read at the end of memory
- if (!fd->read(&fd, cmp_buf, sizeof(test_buf)))
- goto dataflash_test_end;
-
- // Compare if are egual.
- if ((memcmp(cmp_buf,test_buf, sizeof(test_buf)) == 0)
- goto dataflash_test_end;
-
- kprintf("\n");
-
- kprintf("\n====== Test end ===========================================================\n");
- fd.close(&fd);
- return true;
-
-dataflash_test_end:
- fd.close(&fd);
- return false;
-
-}
projects / bertos.git / blobdiff