?? dsp.txt
字號:
extern void InitC5402(void);
extern void InitMcBSP0(void);
extern void ms_delay(int);
extern void send_0(void);
extern void send_1(void);
extern void send_2(void);
extern void send_end(void);
extern void INT3_ISR(void);
extern void porta();
extern void portb();
void write7279(unsigned int cmd,unsigned int dta);
void long_delay(void);
void short_delay(void);
interrupt void key_int();
** Main Function Program
#define DECODE0 0x80
#define CMD_READ 0x15
unsigned int byteout,key_a=2;
char a,b;
void main(void)
{ InitC5402();
InitMcBSP0();
ms_delay(100);
while(1)
{ms_delay(100*key_a);
porta();
ms_delay(100*key_a);
portb();
}
}
void write7279(unsigned int cmd,unsigned int dta)
{ unsigned char i;
unsigned int cmddata;
asm(" NOP ");
asm(" NOP ");
asm(" NOP ");
dta=(dta&0x00ff);
asm(" NOP ");
asm(" NOP ");
asm(" NOP ");
cmddata=((cmd<<8)|dta);
asm(" NOP ");
asm(" NOP ");
asm(" NOP ");
send_0();
for (i=0;i<16;i++)
{ if(cmddata&0x8000)
{send_1();
}
else
{send_2();
}
cmddata=cmddata*2;
}
send_end();
}
void long_delay(void)
{ unsigned char i,j;
for (i=0;i<0xfff;i++)
{ for(j=0;j<0x50;j++)
{}
}
}
void short_delay(void)
{ unsigned char i,j;
for(i=0;i<0x10;i++)
{ for(j=0;j<0x100;j++)
{}
}
}
interrupt void key_int()
{ asm(" NOP ");
INT3_ISR();
asm(" NOP ");
asm(" NOP ");
asm(" NOP ");
key_a=*(unsigned *)0x15;
asm(" NOP ");
asm(" NOP ");
asm(" NOP ");
write7279(DECODE0,key_a);
if(key_a==0xf)
{ main();
}
}
INT3_ISR程序清單
;.mmregs
.include MMRegs.h
.global _INT3_ISR ,write_7279
.ref us_delay ,_ms_delay
;.bss _key_code_vlue,1,0,0
_INT3_ISR:
;CS<=DX, C_KEY_7279<=FSR, CLK<=CLKX, DATA<=CLKR(CLKR<=DATA)
LD #0, DP ; reset data-page pointer
STM #0x2900,ST1 ; ST1 at default (note:INTX=1
******* Disable All Interrupts *******
SSBX INTM ; disable (mask) global(CPU) intrpts
STM #0x0000, IMR ; disable peripheral interrupts
STM #0xFFFF, IFR ; clear the intrupts' flags
STM #0,AR6
STM PCR, McBSP0_SPSA
STM #3F24h, McBSP0_SPSD ; 1x x100
NOP
NOP
STM #3F04h, McBSP0_SPSD ; 0x x100
NOP ; delay 45us
stm #45,ar3
call us_delay
; 0x15 + data
STM #3F06h, McBSP0_SPSD ;0x x110
stm #18,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100 1
stm #20,ar3
call us_delay
STM #3F06h, McBSP0_SPSD ;0x x110
stm #18,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100 2
stm #20,ar3
call us_delay
STM #3F06h, McBSP0_SPSD ;0x x110
stm #18,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100 3
stm #20,ar3
call us_delay
STM #3F07h, McBSP0_SPSD ;0x x111
stm #18,ar3
call us_delay
STM #3F05h, McBSP0_SPSD ;0x x101 4
stm #20,ar3
call us_delay
STM #3F06h, McBSP0_SPSD ;0x x110
stm #18,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100 5
stm #20,ar3
call us_delay
STM #3F07h, McBSP0_SPSD ;0x x111
stm #18,ar3
call us_delay
STM #3F05h, McBSP0_SPSD ;0x x101 6
stm #20,ar3
call us_delay
STM #3F06h, McBSP0_SPSD ;0x x110
stm #18,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100 7
stm #20,ar3
call us_delay
STM #3F07h, McBSP0_SPSD ;0x x111
stm #18,ar3
call us_delay
STM #3F05h, McBSP0_SPSD ;0x x101 8
stm #20,ar3
call us_delay
STM #3F04h, McBSP0_SPSD ;0x x100
stm #8,ar3
call us_delay
STM #3F05h, McBSP0_SPSD ;0x x101
;CS<=DX, C_KEY_7279<=FSR, CLK<=CLKX, DATA<=CLKR(CLKR<=DATA)
nop
nop
stm #80,ar3
call us_delay
nop
STM #3F03h, McBSP0_SPSD ;0x x011
stm #5,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+7
STL A,AR6
STM #3E00h, McBSP0_SPSD ;0x x00x 9
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+6,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 10
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+5,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 11
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+4,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 12
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+3,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 13
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+2,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 14
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+1,B
LDM AR6,A
OR B,A
STL A,AR6
POPM B
STM #3E00h, McBSP0_SPSD ;0x x00x 15
stm #18,ar3
call us_delay
STM #3E02h, McBSP0_SPSD ;0x x01x
stm #20,ar3
call us_delay
PSHM B
LD #0,B
LDM McBSP0_SPSD,A
AND #0001h,A
SFTL A,+0,B
LDM AR6,A
OR B,A
STL A,AR5
POPM B
STM #3F04h, McBSP0_SPSD ;0x x100 16
stm #40,ar3
call us_delay
STM #3F24h, McBSP0_SPSD ;1x x110
NOP
nop
nop
STM #0x6900,ST1 ; ST1 at default (note:INTX=1
STM #0FFFFH,IFR
STM #0x0101, IMR ; able MCBSP0 RX TX INTERRUPT
RSBX INTM ; able (mask) global(CPU) intrpts
NOP
NOP
NOP
RET
port程序清單
.mmregs
.global _porta
.global _portb
_porta: ;向I/O口8001H發送數據5555H
stm 304h,ar1
st 0000h,*ar1
portw *ar1,8001h
ret
_portb: ;向I/O口8001H發送數據AAAAH
stm 304h,ar1
st 0ffffh,*ar1
portw *ar1,8001h
ret
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