I want to make a Filesystem with FileX and use the usbx device storage class to get access to the files. I successfully created a FileX filesystem on ram. I found the examples Ux_Device_MSC, this uses the sd card for the file system.
In ux_device_msc.c i have to implement the Status Read and Write commands comming from usb to acces my filesystem.
/* Format the NOR flash as FAT */
status = fx_media_format(&sram_disk,
fx_stm32_sram_driver, // Driver entry
(VOID*)LX_SRAM_DRIVER_ID, // Device info pointer
(UCHAR*)media_memory, // Media buffer pointer
sizeof(media_memory), // Media buffer size
"SRAM DISK", // Volume Name
1, // Number of FATs
32, // Directory Entries
0, // Hidden sectors
FX_SRAM_DISK_SIZE/512, // Total sectors
512, // Sector size
8, // Sectors per cluster
1, // Heads
1); // Sectors per track
Currently im using this for read and write, but windows tells me i have to format it, but it should already be a filesystem and second formatting fails.
UINT STORAGE_Read(VOID *storage, ULONG lun, UCHAR *data_pointer,
ULONG number_blocks, ULONG lba, ULONG *media_status)
{
UINT status = 0U;
sram_disk.fx_media_driver_request = FX_DRIVER_READ;
sram_disk.fx_media_driver_logical_sector = lba;
sram_disk.fx_media_driver_sectors = number_blocks;
fx_stm32_sram_driver(&sram_disk);
memcpy(data_pointer, sram_disk.fx_media_driver_buffer, number_blocks);
return (status);
}
UINT STORAGE_Write(VOID *storage, ULONG lun, UCHAR *data_pointer,
ULONG number_blocks, ULONG lba, ULONG *media_status)
{
UINT status = 0U;
sram_disk.fx_media_driver_request = FX_DRIVER_WRITE;
sram_disk.fx_media_driver_logical_sector = lba;
sram_disk.fx_media_driver_sectors = number_blocks;
fx_stm32_sram_driver(&sram_disk);
memcpy(sram_disk.fx_media_driver_buffer, data_pointer, number_blocks);
return (status);
}
