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gex-core/vfs/vfs_user.c

116 lines
3.6 KiB

//
// Here are defined the files and handlers
//
/**
* @file vfs_user.c
* @brief Implementation of vfs_user.h
*
* DAPLink Interface Firmware
* Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "platform.h"
#include "utils/ini_writer.h"
#include "framework/settings.h"
#include "vfs_manager.h"
#include "str_utils.h"
const vfs_filename_t daplink_drive_name = VFS_DRIVE_NAME;
static uint32_t read_iw_sector(uint32_t sector_offset, uint8_t *data, uint32_t num_sectors, void (*handler)(IniWriter *))
{
const uint32_t avail = num_sectors*VFS_SECTOR_SIZE;
const uint32_t skip = sector_offset*VFS_SECTOR_SIZE;
IniWriter iw = iw_init((char *)data, skip, avail);
iw_begin();
handler(&iw);
iw_end();
return avail - iw.count;
}
// File callback to be used with vfs_add_file to return file contents
static uint32_t read_file_units_ini(uint32_t sector_offset, uint8_t *data, uint32_t num_sectors)
{
vfs_printf("Read UNITS.INI");
return read_iw_sector(sector_offset, data, num_sectors, settings_build_units_ini);
}
static uint32_t read_file_system_ini(uint32_t sector_offset, uint8_t *data, uint32_t num_sectors)
{
vfs_printf("Read SYSTEM.INI");
return read_iw_sector(sector_offset, data, num_sectors, settings_build_system_ini);
}
static uint32_t read_file_pinout_txt(uint32_t sector_offset, uint8_t *data, uint32_t num_sectors)
{
vfs_printf("Read PINOUT.TXT");
return read_iw_sector(sector_offset, data, num_sectors, settings_build_pinout_txt);
}
void vfs_user_build_filesystem(void)
{
vfs_printf("Rebuilding VFS...");
// Setup the filesystem based on target parameters
vfs_init(daplink_drive_name, 0/*unused "disk size"*/);
vfs_create_file("UNITS INI", read_file_units_ini, NULL, iw_measure_total(settings_build_units_ini, 0));
vfs_create_file("SYSTEM INI", read_file_system_ini, NULL, iw_measure_total(settings_build_system_ini, 0));
vfs_create_file("PINOUT TXT", read_file_pinout_txt, NULL, iw_measure_total(settings_build_pinout_txt, 0));
}
// Callback to handle changes to the root directory. Should be used with vfs_set_file_change_callback
void vfs_user_file_change_handler(const vfs_filename_t filename,
vfs_file_change_t change,
vfs_file_t file, vfs_file_t new_file_data)
{
// Check for "System Volume Information"
if (strstarts(filename, "SYSTEM~1")) {
vfs_printf("ATTN! Windows host detected.");
// TODO take precautions if needed
vfs_is_windows = true;
return;
}
if (VFS_FILE_CHANGED == change) {
// Unused
vfs_printf(">>> CHANGED %s", filename);
}
if (VFS_FILE_CREATED == change) {
// do something based on the filename here
vfs_printf(">>> CREATED %s", filename);
}
if (VFS_FILE_DELETED == change) {
//
vfs_printf(">>> DELETED %s", filename);
}
}
void vfs_user_disconnecting(void)
{
// maybe reset...
vfs_printf("vfs_user_disconnecting");
}