内容发布更新时间 : 2024/12/23 10:26:54星期一 下面是文章的全部内容请认真阅读。
; ; ; ;
ssbx xf
NOP NOP
CALL IfTxRDY1
STM #0x0101, McBSP1_DXR1
CALL IfTxRDY1
STM #0x0208, McBSP1_DXR1
;; rsbx xf ;; NOP
;;NOP
CALL IfTxRDY1
CALL IfTxRDY1
STM #0000h, McBSP1_DXR1
NOP NOP rpt #20h
STM #0x0001, McBSP1_DXR1;request secondary communication NOP
CALL IfTxRDY1
STM #0100h, McBSP1_DXR1;write 00h to register 1
nop
CALL IfTxRDY1
STM #0x0001, McBSP1_DXR1;request secondary communication CALL IfTxRDY1
STM #0200h, McBSP1_DXR1;write 00h to register 2
CALL IfTxRDY1
STM #0000h, McBSP1_DXR1
CALL IfTxRDY1 STM #0x0001, McBSP1_DXR1;request secondary communication
CALL IfTxRDY1
STM #0300h, McBSP1_DXR1;write 00h to register 3 CALL IfTxRDY1
STM #0000h, McBSP1_DXR1
CALL IfTxRDY1 STM #0x0001, McBSP1_DXR1;request secondary communication CALL IfTxRDY1 STM #0490h, McBSP1_DXR1;write 00h to register 4 ; ; ; ; ; ; ; ;
RET NOP NOP
;bypass internal DPLL
;and select the Sample Frequency
CALL IfTxRDY1
STM #0000h, McBSP1_DXR1
CALL IfTxRDY1
STM #0x0001, McBSP1_DXR1 CALL IfTxRDY1
STM #0102h, McBSP1_DXR1 ;enable digital loopback CALL IfTxRDY1
STM #0x0001, McBSP1_DXR1 CALL IfTxRDY1
STM #0208h, McBSP1_DXR1 ;enable analog loopback
*********************
_CloseMcBSP: STM SPCR1, McBSP1_SPSA ; disable McBSP0 RX LDM McBSP1_SPSD,A
_READAD50:
AND #0xFFFE, A
STLM A, McBSP1_SPSD
STM SPCR2, McBSP1_SPSA ; disable McBSP0 TX LDM McBSP1_SPSD,A AND #0xFFFE, A
STLM A, McBSP1_SPSD RPT #5 RET NOP NOP
stm 0x00ff,ar3
stm 0x3000,ar2 loopa: CALL IfRxRDY1
ldm McBSP1_DRR1,b stl b,*ar2+
; banz loopa,*ar3-
nop nop ret nop nop
_WRITEAD50: stm stm loopb: ;
ldu
0x00ff,ar3 0x3100,ar2
CALL IfTxRDY1
*ar2+,B
and #0fffeh,b ;mask the LSB stlm B, McBSP1_DXR1 banz loopb,*ar3- nop nop ret nop nop
wait: stm 20h,ar3 loop1: stm 020h,ar4 loop2: banz
banz ret nop nop nop nop .end
loop2,*ar4- loop1,*ar3-
************************************************************************ ** End of File –– InitC5402.asm
2.ad50.cmd
MEMORY {
PAGE 0: /* program space */
VECS: origin = 0x0080, length = 0x007f /* 128bytes vector table space */ PROG: origin = 0x0100, length = 0x24ff /* 8K program memory space */ PAGE 1: /* data space */
SCRA: origin = 0x0060, length = 0x001f /* scratch pad mem space */ STCK: origin = 0x2600, length = 0x04ff /* 1K words for stack */ DAT1: origin = 0x2b00, length = 0x04ff /* 256 words for sys data */ DAT2: origin = 0x3200, length = 0x0e00 /* 12K words for appl data */ }
SECTIONS
{
.vectors : {} > VECS PAGE 0 /* interrupt vector table */ .text : {} > PROG PAGE 0 /* program code */ .data : {} > PROG PAGE 0 /* initialized data */
.coeffs : {} > PROG PAGE 0 /* initialized parameters */ .stack : {} > STCK PAGE 1 /* software stack section */ .variable : {} > DAT1 PAGE 1 /* uninitialized vars for DSP&AIC10 */ .bss : {} > DAT2 PAGE 1 /* uninitialized vars for applications */ }
3. C源程序 (1)Tonetest01.c
extern void InitC5402(void); extern void OpenMcBSP(void); extern void CloseMcBSP(void); extern void READAD50(void); extern void WRITEAD50(void);
/*********************************************************************** ** Main Function Program
***********************************************************************/ #include \ #include \ #define pi 3.1415926
void main(void) { int k=0; //
{
int x_ad,y_da; int *px = (int*)0x3000; int *py = (int*)0x3100;
for ( ; ; )
InitC5402(); /* initialize C5402 DSP */ OpenMcBSP();
for ( ; ; ) {
// for (j=0; j<=4; j++) { READAD50();
px = (int*)(0x3000); x_ad = *px;
y_da = x_ad; py = (int*)(0x3100); *py = y_da;
}
}
WRITEAD50(); k++;
} }
/*void PROCESSING(void) {
do the necessery operations here!*/
/*********************************************************************** ** End of File –– exp08.c