1 // Copyright 2018 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include "esp_vfs_fat.h" 18 #include <sys/param.h> 19 #include <stddef.h> 20 esp_vfs_fat_get_allocation_unit_size(size_t sector_size,size_t requested_size)21static inline size_t esp_vfs_fat_get_allocation_unit_size( 22 size_t sector_size, size_t requested_size) 23 { 24 size_t alloc_unit_size = requested_size; 25 const size_t max_sectors_per_cylinder = 128; 26 const size_t max_size = sector_size * max_sectors_per_cylinder; 27 alloc_unit_size = MAX(alloc_unit_size, sector_size); 28 alloc_unit_size = MIN(alloc_unit_size, max_size); 29 return alloc_unit_size; 30 } 31
