************************************************
* FileName: ex11.asm *
* Description: 正弦波发生器实验 *
* Copyright(C) SanZhi Electronic, Author Zpin *
************************************************
.title "ex11"
BSP .set 1 ;当前使用McBsp1
;McBsp 内存映射寄存器
SPSA0 .set 038h
SPSD0 .set 039h
DRR10 .set 021h
DRR20 .set 020h
DXR10 .set 023h
DXR20 .set 022h
SPSA1 .set 048h
SPSD1 .set 049h
DRR11 .set 041h
DRR21 .set 040h
DXR11 .set 043h
DXR21 .set 042h
SPSA2 .set 034h
SPSD2 .set 035h
DRR12 .set 031h
DRR22 .set 030h
DXR12 .set 033h
DXR22 .set 032h
;McBsp Subaddressed Registers
SPCR1 .set 00h
SPCR2 .set 01h
RCR1 .set 02h
RCR2 .set 03h
XCR1 .set 04h
XCR2 .set 05h
SRGR1 .set 06h
SRGR2 .set 07h
MCR1 .set 08h
MCR2 .set 09h
RCERA .set 0ah
RCERB .set 0bh
XCERA .set 0ch
XCERB .set 0dh
PCR .set 0eh
.if BSP = 0
SPSA .set SPSA0
SPSD .set SPSD0
RDRR .set DRR10
RDXR .set DXR10
IMASK .set 0010h
.endif
.if BSP = 1
SPSA .set SPSA1
SPSD .set SPSD1
RDRR .set DRR11
RDXR .set DXR11
IMASK .set 0400h
.endif
WR_SUB_REG .macro val,addr ;写McBsp控制寄存器
stm addr,SPSA
nop
stm val,SPSD
nop
.endm
RD_SUB_REG .macro addr,acc ;读McBsp控制寄存器
stm #:addr:,SPSA
nop
ldm SPSD,acc
nop
nop
nop
.endm
WAITTRX .macro ;等待串口中断
WAITR?
RD_SUB_REG SPCR1,A
and #1<<1, A
bc WAITR?, AEQ
.endm
PROGREG .macro progword ;与AD50二次通讯
stm #01h,RDXR
WAITTRX
stm #:progword:,RDXR
WAITTRX
.endm
wait .macro
STM #0008h, AR0
RPT *AR0
NOP
.endm
.mmregs
.global _c_int00
.sect ".vectors"
RESET bd _c_int00
stm #3000h,SP
.space 19*4*16
BRINT0 b recv
nop
nop
BXINT0 b trans
nop
nop
.space 4*4*16
BRINT1 b recv
nop
nop
BXINT1 b trans
nop
nop
.space 4*4*16
.data
.word 8000h,0db23h,8000h,0e1e7h,8000h,0fb47h,8000h,15e5h,8000h,252fh,8000h,2879h,8000h,1b1fh,8000h,0155h
.text
_c_int00
ld #0h,DP
stm #37ffh,SP
ssbx INTM
ssbx SXM
st #2491h,SWWSR
st #0ffe0h,PMST
st #0f007h,CLKMD
stm #4100h,AR2
stm #4000h,AR1
stm #10h,BK
mcbsp_init ;初始化McBsp串口
rsbx CPL
nop ; cpl latency
nop ; cpl latency
nop ; cpl latency
ld #0, DP
ssbx INTM
ssbx SXM
WR_SUB_REG #0000H,SPCR1
WR_SUB_REG #0200H,SPCR2
WR_SUB_REG #000CH,PCR
WR_SUB_REG #0000H,SPCR1
WR_SUB_REG #0000H,SPCR2
WR_SUB_REG #0040H,RCR1 ;16 BITs
WR_SUB_REG #0004H,RCR2 ;Ignore FS after the first
WR_SUB_REG #0040H,XCR1 ;16 BITs
WR_SUB_REG #0004H,XCR2 ;Ignore FS after the first
ld 100,A
wait
andm #0ff3fh, 54h ;set interrupts to come from serial ports not DMA
;by clearing bits 6 and 7 in DMPREC
stm #0,RDXR
WR_SUB_REG #0001H,SPCR1 ;启动McBsp串口
WR_SUB_REG #0201H,SPCR2
ld 100,A
wait
aic_init
stm #0h,IMR
orm #IMASK,IMR
stm #0ffffh,IFR
;PROGREG 0104H ;二次通讯初始化AD50
;PROGREG 02C0H
PROGREG 0301h
PROGREG 0400h
;PROGREG 0000001100000001b
; 876543210
;PROGREG 0000010000010000b
; 876543210
ld RDRR,A
ld RDRR,A
stlm A,RDXR
stlm A,RDXR
rsbx INTM
nop
nop
nop
js nop
nop
nop
b js
recv ldm RDRR,A ;读ADC采样值以清除中断标志
ld *AR1+%,A ;读正弦波表
and #0fffeh,A
stlm A,RDXR ;输出到DAC通道
rete
trans rsbx XF
rete
|
楼主
标题置顶
标题高亮
