The component manages a disk on a volatile memory (internal RAM).
This can be connected to a File System management or a USB Device Mass Storage Interface via the service Memory Control Access.
Functions | |
Ctrl_status | virtual_mem_2_ram (uint32_t addr, void *ram) |
This function transfers 1 data sector from memory to RAM sector = 512 bytes. More... | |
Ctrl_status | virtual_ram_2_mem (uint32_t addr, const void *ram) |
This function transfers 1 data sector from memory to RAM sector = 512 bytes. More... | |
Ctrl_status | virtual_read_capacity (uint32_t *uint32_t_nb_sector) |
This function returns the address of the last valid sector. More... | |
bool | virtual_removal (void) |
This function informs about the memory type. More... | |
Ctrl_status | virtual_test_unit_ready (void) |
This function tests memory state, and starts memory initialization. More... | |
bool | virtual_unload (bool unload) |
This function unloads/loads the memory. More... | |
bool | virtual_wr_protect (void) |
This function returns the write-protected mode. More... | |
Variables | |
static bool | b_vmem_unloaded = false |
static COMPILER_WORD_ALIGNED uint8_t | vmem_data [VMEM_NB_SECTOR *VMEM_SECTOR_SIZE] |
Ctrl_status virtual_mem_2_ram | ( | uint32_t | addr, |
void * | ram | ||
) |
This function transfers 1 data sector from memory to RAM sector = 512 bytes.
addr | Sector address to start read |
ram | Address of RAM buffer |
References CTRL_FAIL, CTRL_GOOD, Max, min, vmem_data, VMEM_NB_SECTOR, and VMEM_SECTOR_SIZE.
Ctrl_status virtual_ram_2_mem | ( | uint32_t | addr, |
const void * | ram | ||
) |
This function transfers 1 data sector from memory to RAM sector = 512 bytes.
addr | Sector address to start write |
ram | Address of RAM buffer |
References CTRL_FAIL, CTRL_GOOD, vmem_data, VMEM_NB_SECTOR, and VMEM_SECTOR_SIZE.
Ctrl_status virtual_read_capacity | ( | uint32_t * | uint32_t_nb_sector | ) |
This function returns the address of the last valid sector.
uint32_t_nb_sector | Pointer to number of sectors (sector=512 bytes) |
References b_vmem_unloaded, CTRL_GOOD, CTRL_NO_PRESENT, and VMEM_NB_SECTOR.
bool virtual_removal | ( | void | ) |
This function informs about the memory type.
Ctrl_status virtual_test_unit_ready | ( | void | ) |
This function tests memory state, and starts memory initialization.
References b_vmem_unloaded, CTRL_GOOD, and CTRL_NO_PRESENT.
This function unloads/loads the memory.
References b_vmem_unloaded, and unload.
bool virtual_wr_protect | ( | void | ) |
This function returns the write-protected mode.
Referenced by virtual_read_capacity(), virtual_test_unit_ready(), and virtual_unload().
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static |
Referenced by virtual_mem_2_ram(), and virtual_ram_2_mem().