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authorNélio Laranjeiro2009-05-11 22:06:51 +0200
committerNélio Laranjeiro2009-05-11 22:06:51 +0200
commitcadf1a3749fc51d266e9672fdecf1c8cd69c92a3 (patch)
treebabc2c77cbafce99c803215c7d56d443dd8f7119 /digital/avr/modules/flash/flash.c
parentb12be58d4044e50127597e7d0f4db0f16cafdcdc (diff)
* digital/avr/modules/flash: (Closes #68).
* Removed the flash stub sub directory and add a real stub in flash.host.c file.
Diffstat (limited to 'digital/avr/modules/flash/flash.c')
-rw-r--r--digital/avr/modules/flash/flash.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/digital/avr/modules/flash/flash.c b/digital/avr/modules/flash/flash.c
deleted file mode 100644
index 7b563bc6..00000000
--- a/digital/avr/modules/flash/flash.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/* flash.c */
-/* {{{
- *
- * Copyright (C) 2008 Nélio 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 "flash.h"
-#include "modules/proto/proto.h"
-#include "modules/spi/spi.h"
-#include "modules/utils/utils.h"
-
-#define FLASH_LOG_PAGE_SIZE 0x80000
-#define FLASH_LOG_BUFFER_SIZE 128
-
-/** 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)
-{
- /* The address must be sent */
- spi_send ((addr >> 16) & 0x1f);
- spi_send (addr >> 8);
- spi_send (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)
-{
- flash_send_command (FLASH_WREN);
-
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- /* send the command. */
- spi_send (cmd);
-
- /* verify if the cmd is the full erase. */
- if (cmd != FLASH_ERASE_FULL)
- {
- /* Send the start address */
- flash_address (start_addr);
- }
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-
- while (flash_is_busy());
-}
-
-/* Send a flash command to the flash memory (only a command).
- * \param cmd the command to send.
- */
-void
-flash_send_command (uint8_t cmd)
-{
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- spi_send (cmd);
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-}
-
-
-/** Poll the busy bit in the Software Status Register of the flash memory.
- * \return the status register.
- */
-uint8_t
-flash_read_status (void)
-{
- uint8_t res;
-
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- spi_send (FLASH_RDSR);
- res = spi_recv();
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-
- return res;
-}
-
-/** Initialise the flash memory.
- * \return true if the flash is present, false otherwise.
- */
-uint8_t
-flash_init (void)
-{
- uint8_t rsp[3];
-
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
- AC_FLASH_DDR |= _BV(AC_FLASH_BIT_SS);
-
- /* send the read-ID instruction. */
- spi_init (SPI_MASTER, SPI_CPOL_FALLING | SPI_CPHA_SETUP, SPI_MSB_FIRST,
- SPI_FOSC_DIV16);
-
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- spi_send (FLASH_READ_ID);
- rsp[0] = spi_recv ();
- rsp[1] = spi_recv ();
- rsp[2] = spi_recv ();
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-
- if (rsp[0] != 0xBF)
- return 0;
-
- proto_send3b ('f',rsp[0], rsp[1], rsp[2]);
-
- if (flash_status_aai())
- {
- flash_send_command (FLASH_WEDI);
- }
-
- /* Enables the flash to be writable. */
- flash_send_command (FLASH_WREN);
-
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- spi_send (FLASH_WRSR);
- spi_send (0);
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-
- /* Read the flash status. */
- proto_send1b ('s', flash_read_status());
-
- return 1;
-}
-
-/** 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)
-{
- while (flash_is_busy ());
- flash_send_command (FLASH_WREN);
-
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- /* Write instruction. */
- spi_send (FLASH_WRITE);
- flash_address (addr);
- spi_send (data);
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
-
- /* Wait for the flash until it is busy */
- while (flash_is_busy());
-}
-
-/** Read the data at the address provided.
- * \return the data read.
- */
-uint8_t
-flash_read (uint32_t addr)
-{
- uint8_t data;
-
- while (flash_is_busy ());
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- /* Send the read instruction. */
- spi_send (FLASH_READ);
- flash_address (addr);
- data = spi_recv ();
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
- while (flash_is_busy ());
- return data;
-}
-
-/** 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)
-{
- uint8_t i;
-
- while (flash_is_busy ());
- AC_FLASH_PORT &= ~_BV(AC_FLASH_BIT_SS);
- spi_send (FLASH_READ);
- flash_address (addr);
- for (i = 0; i < length; i++)
- {
- buffer[i] = spi_recv ();
- }
- AC_FLASH_PORT |= _BV(AC_FLASH_BIT_SS);
- while (flash_is_busy ());
-}
-
-/** 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)
-{
- uint32_t i;
-
- for (i = 0; i < length; i++)
- {
- flash_write (addr + i, data[i]);
- }
-}
-
-int8_t
-flash_log (uint8_t size, uint8_t *args)
-{
- uint8_t buf[FLASH_LOG_BUFFER_SIZE+1];
- int8_t error = 0x0;
- uint32_t addr = 0;
-
- if (size >= 4)
- addr = (((uint32_t) args[1]) << 16)
- | (((uint32_t) args[2]) << 8) | args[3];
-
- switch (args[0])
- {
- case FLASH_CMD_INIT:
- error = !flash_init ();
- proto_send1b ('s', error ? 0 : 1);
- break;
- case FLASH_CMD_READ:
- if ((size == 5)
- && (args[4] <= sizeof(buf)))
- {
- flash_read_array (addr, buf, args[4]);
- proto_send ('r', args[4], buf);
- error = 0;
- }
- else if (size == 4)
- {
- proto_send1b ('r', flash_read (addr));
- error = 0;
- }
- else
- error = 2;
- break;
- default:
- return 3;
- }
-
- return error;
-}