Installation
Firmware Package User Guide
2-9
4209A–MP3–12/02
2.3
SBC Libraries
Interface
SBC module is composed of the following libraries:
n
sbc.lib:this lib contains the common (not memory dependant) SBC functions.
n
sbc_df.libthis lib contains the specific SBC functions for DataFlash support.
n
sbc_mmc.lib:this lib contains the specific SBC functions for MultiMediaCard support.
n
sbc_nf.lib:this lib contains the specific SBC functions for Nand Flash support.
n
sbc_smc.lib:this lib contains the specific SBC functions for SmartMediaCard support.
2.3.1
Global Variables
n
gl_sbc_wr_busy
1-bit write activity, set to ON by library, must be set to OFF by consuming task (see
disp_task.c).
n
gl_sbc_rd_busy
1-bit read activity, set to ON by library, must be set to OFF by consuming task (see
disp_task.c).
n
gl_sbc_wr_protect
1-bit write protection, set to ON or OFF before calling the library command browser
(see usb_task.c).
n
dCBWDataTransferLength
4-byte unsigned USB variable (declared in usb_task.c).
n
gl_sbc_vendor_id
8-char table in code space
(see Section 2.2.2 for configuration).
n
gl_sbc_product_id
16-char table in code space
(see Section 2.2.2 for configuration).
n
gl_sbc_revision_id
4-char table in code space
(see Section 2.2.2 for configuration).
2.3.2
Internal Library
Functions
In the following items xxx may represent df, nf, smc,cf… depending on the memory
library.
n
void sbc_xxx_init (void)
Memory dedicated SBC support initialization function.
n
void sbc_command_xxx (void)
Memory dedictaed SBC support command parser function.
2.3.3
External Library
Functions
In the following items xxx may represent df, nf, smc,cf… depending on the memory
library.
n
xxx_block_size_0(), xxx_block_size_1(), xxx_block_size_2(), xxx_block_size_3():
4-byte unsigned block size (byte unit) reported byte by byte.
n
xxx_disk_size_0(), xxx_disk_size_1(), xxx_disk_size_2(), xxx_disk_size_3():
4-byte unsigned disk size (block unit) reported byte by byte.
n
xxx_read_open(void), xxx_read_sector(sector_nb), xxx_read_close(void)
functions implemented in memory driver module.
n
xxx_write_open(void), xxx_write_sector(sector_nb), xxx_write_close(void)
functions implemented in memory driver module.
n
xxx_check_presence()
function implemented in removable memory (card) driver module only.
Summary of Contents for AT89C51SND1C
Page 1: ...Firmware Package User Guide ...
Page 2: ......
