129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
/****************************************************************************
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* boards/arm/at32/at32f437-mini/src/at32_at24.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/mtd/mtd.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/nxffs.h>
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#include "at32_i2c.h"
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#include "at32f437-mini.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: at32_at24_automount
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*
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* Description:
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* Initialize and configure the AT24 serial EEPROM
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*
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****************************************************************************/
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int at32_at24_automount(int minor)
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{
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struct i2c_master_s *i2c;
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struct mtd_dev_s *mtd;
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static bool initialized = false;
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int ret;
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/* Have we already initialized? */
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if (!initialized)
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{
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/* No.. Get the I2C bus driver */
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finfo("Initialize I2C%d\n", AT24_I2C_BUS);
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i2c = at32_i2cbus_initialize(AT24_I2C_BUS);
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if (!i2c)
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{
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ferr("ERROR: Failed to initialize I2C%d\n", AT24_I2C_BUS);
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return -ENODEV;
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}
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/* Now bind the I2C interface to the AT24 I2C EEPROM driver */
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finfo("Bind the AT24 EEPROM driver to I2C%d\n", AT24_I2C_BUS);
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mtd = at24c_initialize(i2c);
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if (!mtd)
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{
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ferr("ERROR: Failed to bind TWI%d to the AT24 EEPROM driver\n",
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AT24_I2C_BUS);
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return -ENODEV;
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}
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#if defined(CONFIG_FS_NXFFS)
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/* Initialize to provide NXFFS on the MTD interface */
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finfo("Initialize the NXFFS file system\n");
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ret = nxffs_initialize(mtd);
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if (ret < 0)
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{
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ferr("ERROR: NXFFS initialization failed: %d\n", ret);
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return ret;
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}
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/* Mount the file system at /mnt/at24 */
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finfo("Mount the NXFFS file system at /dev/at24\n");
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ret = nx_mount(NULL, "/mnt/at24", "nxffs", 0, NULL);
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if (ret < 0)
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{
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ferr("ERROR: Failed to mount the NXFFS volume: %d\n", ret);
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return ret;
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}
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#else
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/* And use the FTL layer to wrap the MTD driver as a block driver */
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finfo("Initialize the FTL layer to create /dev/mtdblock%d\n",
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AT24_MINOR);
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ret = ftl_initialize(AT24_MINOR, mtd);
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if (ret < 0)
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{
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ferr("ERROR: Failed to initialize the FTL layer: %d\n", ret);
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return ret;
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}
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#endif
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/* Now we are initialized */
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initialized = true;
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}
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return OK;
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}
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