參數(shù)資料
型號(hào): KD16902
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: Virtual Surround Processor(虛擬環(huán)繞處理器)
中文描述: 虛擬環(huán)繞聲處理器(虛擬環(huán)繞處理器)
文件頁(yè)數(shù): 35/74頁(yè)
文件大小: 327K
代理商: KD16902
FUNCTIONAL DESCRIPTION
KD16902 VIRTUAL SURROUND PROCESSOR
35
Example:
Following codes illustrate the proper usage of FLAG and user's working buffers. The user buffers
are in the same order as the input buffers in this code.
andi 00
ld @Flag, a
User_Wait:
mod f, setie
andi 00
cmp a, @Flag
bra z =1, @User_Wait
andi 00
ld @Flag, a
ldi xr0, 1 # The user buffers are in page 1 of RAM0
ldi xr5, 0
ldi r0, @UserL # The user buffers
ldi r5, @InputL # The input buffers defined for the KD16902
ldi a, 0x0C
Read_Input:
ld x, (r5+!)
ld (r0+!), x
sub 01
bra z=0, @Read_Input
User_Main:
main part of user written program
Similar to the inputs, the L/Ls/C/Lv and R/Rs/LFE/Rv samples are written to the external registers at different
instances of output interrupt. The L/Ls/C/Lv samples are written to the external registers first followed by the R/Rs/
C/Rv samples at the next interrupt. Since the KD16902 requires the user written program to be synchronized with
the input interrupt, a special treatment is needed for the output. The KD16902 offers two subroutines for handling
the output. The first one, Init_OP_Buffers, is used for initializing the output buffers. The user must include this sub-
routine at the beginning of the program. The second one, Set_OP_Buffers, returns the pointer to the output buffers.
It places the beginning address of the output buffers to the register, r5. The output buffers are in page 0 of RAM1.
Therefore, the user must set xr5 to 0 before calling this subroutine. The user must place this subroutine before writ-
ing output the output buffers. Table 29 shows the order of output buffers.
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