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Calculate properly Firmware MSC fat table sectors

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me-no-dev
2021-10-13 15:39:36 +03:00
parent 7a7bd37e51
commit 2fb2ef54ce
2 changed files with 4 additions and 3 deletions
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6
cores/esp32/firmware_msc_fat.c
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@ -39,7 +39,7 @@ static const char * FAT12_FILE_SYSTEM_TYPE = "FAT12";
static uint16_t fat12_sectors_per_alloc_table(uint32_t sector_num){
uint32_t required_bytes = (((sector_num * 3)+1)/2);
return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & DISK_SECTOR_SIZE)?1:0);
return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & (DISK_SECTOR_SIZE - 1))?1:0);
}
static uint8_t * fat12_add_table(uint8_t * dst, fat_boot_sector_t * boot){
@ -68,7 +68,7 @@ static const char * FAT16_FILE_SYSTEM_TYPE = "FAT16";
static uint16_t fat16_sectors_per_alloc_table(uint32_t sector_num){
uint32_t required_bytes = sector_num * 2;
return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & DISK_SECTOR_SIZE)?1:0);
return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & (DISK_SECTOR_SIZE - 1))?1:0);
}
static uint8_t * fat16_add_table(uint8_t * dst, fat_boot_sector_t * boot){
@ -129,7 +129,7 @@ fat_boot_sector_t * fat_add_boot_sector(uint8_t * dst, uint16_t sector_num, uint
boot->num_heads = 1;
boot->hidden_sectors_count = 0;
boot->total_sectors_32 = 0;
boot->physical_drive_number = 0x00;
boot->physical_drive_number = 0x80;
boot->reserved0 = 0x00;
boot->extended_boot_signature = 0x29;
boot->serial_number = serial_number;