NOR BSP Overview
A BSP is required so that a physical-layer driver for a parallel flash will work on a particular system. The functions shown in the table below must be implemented. Pleaser refer to section C-10 “NOR Flash BSP” on page 473 for the details about implementing your own BSP.
|
Function |
Description |
|
FSDev_NOR_BSP_Open() |
Open (initialize) bus for NOR. |
|
FSDev_NOR_BSP_Close() |
Close (uninitialize) bus for NOR. |
|
FSDev_NOR_BSP_Rd_XX() |
Read from bus interface. |
|
FSDev_NOR_BSP_RdWord_XX() |
Read word from bus interface. |
|
FSDev_NOR_BSP_WrWord_XX() |
Write word to bus interface |
|
FSDev_NOR_BSP_WaitWhileBusy() |
Wait while NOR is busy. |
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- NOR BSP functions
The Open()/Close() functions are called upon open/close; these calls are always matched.
The remaining functions (Rd_XX(), RdWord_XX(), WrWord_XX()) read data from or write data to the NOR. If a single parallel NOR device will be accessed, these function may be defined as macros to speed up bus accesses.