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-rw-r--r--digital/avr/modules/flash/flash.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/digital/avr/modules/flash/flash.c b/digital/avr/modules/flash/flash.c
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+++ b/digital/avr/modules/flash/flash.c
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+/* flash.c */
+/* {{{
+ *
+ * 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 "flash.h"
+#include "spi.h"
+
+static flash_t flash_global;
+
+/** Initialise the flsah memory.
+ */
+void
+flash_init (void)
+{
+ flash_global.addr = 0x0;
+}
+
+/** Write in the flash byte provided in parameter.
+ * \param addr the address to store the data.
+ * \param data the buffer to store the data.
+ */
+void
+flash_write (uint8_t addr, uint8_t data)
+{
+ spi_init (SPI_IT_DISABLE | SPI_ENABLE | SPI_MSB_FIRST | SPI_MASTER |
+ SPI_CPOL_RISING | SPI_CPHA_SAMPLE | SPI_FOSC_DIV2);
+ spi_send (addr);
+ spi_send (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 (uint8_t addr)
+{
+ spi_init (SPI_IT_DISABLE | SPI_ENABLE | SPI_MSB_FIRST | SPI_MASTER |
+ SPI_CPOL_RISING | SPI_CPHA_SAMPLE | SPI_FOSC_DIV2);
+ spi_send (addr);
+ return spi_recv (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 wich 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 (uint8_t addr, uint8_t *buffer, uint8_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 (uint8_t addr, uint8_t *data, uint8_t length);
+
+/** Read the memory from the address automaticaly managed, the offset of the
+ * data shall be provided to get the data.
+ * \param offset the offset from the current address managed.
+ * \return data read from the memory.
+ */
+uint8_t
+flash_read_managed (uint8_t offset);
+
+/** Read an array of data from the memory starting at the address less the
+ * offset provided in parameters. The data read will be stored in the buffer
+ * provided in memory too. The buffer shall have at list the length of the
+ * offset provided.
+ * \param offset the offset of the current position to read the data.
+ * \param buffer the buffer to store the data.
+ */
+void
+flash_read_managed_array (uint8_t offset, uint8_t *buffer);
+
+/** Write a data with a managed array.
+ * \param data to store in the memory.
+ */
+flash_write_managed (uint8_t data);
+
+/** Write an array of data to the flash memory. The length of the array shall
+ * be provided.
+ * \param buffer the buffer containing the data to write.
+ * \param length the data length to write.
+ */
+void
+flash_write_managed_array (uint8_t *buffer, uint8_t length);
+