spi.s

avr atmega168v spi的程序

	.module spi.c
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\spi\spi_master\spi.c
	.dbfile G:\燕洪成\gra_des\exper\inc\myfun.h
	.dbfunc e Delayus _Delayus fV
;           time -> R16,R17
	.even
_Delayus::
	.dbline -1
	.dbline 3
; //******DelayTime*******//	 
; void Delayus(int time)
; {     
L2:
	.dbline 5
;  do
;       time--;
	subi R16,1
	sbci R17,0
L3:
	.dbline 6
;  while(time>1);
	ldi R24,1
	ldi R25,0
	cp R24,R16
	cpc R25,R17
	brlt L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r time 16 I
	.dbend
	.dbfunc e Delayms _Delayms fV
;           time -> R20,R21
	.even
_Delayms::
	st -y,R20
	st -y,R21
	movw R20,R16
	.dbline -1
	.dbline 9
; }	  
; void Delayms(unsigned int time)
; {
	xjmp L7
L6:
	.dbline 11
;  while(time!=0)
; 	  {		
	.dbline 12
; 	   Delayus(1000);
	ldi R16,1000
	ldi R17,3
	xcall _Delayus
	.dbline 13
; 	   time--;
	subi R20,1
	sbci R21,0
	.dbline 14
; 	  }
L7:
	.dbline 10
	cpi R20,0
	cpc R20,R21
	brne L6
X1:
	.dbline -2
L5:
	.dbline 0 ; func end
	ld R21,y+
	ld R20,y+
	ret
	.dbsym r time 20 i
	.dbend
	.dbfile G:\燕洪成\gra_des\exper\spi\spi_master\spi.c
	.dbfunc e USART_Init _USART_Init fV
	.even
_USART_Init::
	.dbline -1
	.dbline 23
; // **************************************************************
; // ***         实验：        SPI Interface  Master            ***
; // ***                       2007年10月13日                   ***
; // ***         目标MCU:MEGA168v     晶振：内部  8MHZ          ***
; // **************************************************************
; //set_bit:PORTD |=(1<<PORTD3);
; //clr_bit:PORTD &=~(1<<PORTD3);
; #include<iom168v.h>
; #include<macros.h>
; #include<myfun.h>
; 
; //*************************************************
; //******************  USART  **********************
; //*************************************************
; #define USART_DDR DDRD
; #define DDR_TX DDD1
; #define USART_PORT PORTD
; #define USART_RX PORTD0
; //***********串口初始化******************************* 
; //内部8Mhz频率，设置波特率9.6k，8位数据位，
; //无校验,1位停止位
; void USART_Init(void) 
; {  
	.dbline 24
;   USART_DDR |=(1<<DDR_TX);   //set TX output
	sbi 0xa,1
	.dbline 25
;   USART_PORT |=(1<<USART_RX);  //RX pull up 
	sbi 0xb,0
	.dbline 27
;    
;   UCSR0B = 0x00; //设置波特率之前先关闭串口
	clr R2
	sts 193,R2
	.dbline 28
;   UCSR0A = 0x00;
	sts 192,R2
	.dbline 29
;   UBRR0H=0;
	sts 197,R2
	.dbline 30
;   UBRR0L=51;
	ldi R24,51
	sts 196,R24
	.dbline 32
;   //UCSR0B=(1<<RXEN0)|(1<<TXEN0)|(1<<RXCIE0);//enable
;   UCSR0B=(1<<RXEN0)|(1<<TXEN0);
	ldi R24,24
	sts 193,R24
	.dbline 33
;   UCSR0C=(1<<UCSZ00)|(1<<UCSZ01);//8 data,1 stop 
	ldi R24,6
	sts 194,R24
	.dbline -2
L9:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e USART_Transmit _USART_Transmit fV
;           data -> R16
	.even
_USART_Transmit::
	.dbline -1
	.dbline 38
; }
;  
; //***************串口发送数据函数***************************
; void USART_Transmit(unsigned char data)  //查询方式发送接收字符函数 
;  { 
L11:
	.dbline 40
;   while( !(UCSR0A & (1<<UDRE0)))     //等待发送缓冲区为空
;         ;                   
L12:
	.dbline 39
	lds R2,192
	sbrs R2,5
	rjmp L11
X2:
	.dbline 41
;   UDR0 = data;
	sts 198,R16
	.dbline -2
L10:
	.dbline 0 ; func end
	ret
	.dbsym r data 16 c
	.dbend
	.dbfunc e SPI_MasterInit _SPI_MasterInit fV
	.even
_SPI_MasterInit::
	.dbline -1
	.dbline 58
;  }   
; //*************************************************
; //**************** USART_over *********************
; //*************************************************
; //*************************************************//
; //******************  SPI  ************************//
; //*************************************************//
; #define DDR_SPI DDRB
; #define DDR_SS DDB2
; #define DDR_MOSI DDB3
; #define DDR_MISO DDB4
; #define DDR_SCK DDB5
; #define SPI_PORT PORTB
; #define SPI_SS PORTB2
; //**SPI_MasterInit()**//
; void SPI_MasterInit(void)
; {
	.dbline 59
;  DDR_SPI = (1<<DDR_SS)|(1<<DDR_MOSI)|(1<<DDR_SCK);//Port initialize 
	ldi R24,44
	out 0x4,R24
	.dbline 60
;  SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR0);//enable SPI,Master,fosc/16
	ldi R24,81
	out 0x2c,R24
	.dbline -2
L14:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e SPI_MasterTransmit _SPI_MasterTransmit fV
;          cData -> R16
	.even
_SPI_MasterTransmit::
	.dbline -1
	.dbline 64
; }
; //**SPI_MasterTransmit()**//
; void SPI_MasterTransmit(unsigned char cData)
; {
	.dbline 65
;  SPI_PORT &=~(1<<SPI_SS);
	cbi 0x5,2
	.dbline 66
;  SPDR = cData;//启动数据传输
	out 0x2e,R16
L16:
	.dbline 68
;  while(!(SPSR & (1<<SPIF)))//等待传输结束
;       ;
L17:
	.dbline 67
	in R2,0x2d
	sbrs R2,7
	rjmp L16
X3:
	.dbline 69
;  SPI_PORT |=(1<<SPI_SS);
	sbi 0x5,2
	.dbline -2
L15:
	.dbline 0 ; func end
	ret
	.dbsym r cData 16 c
	.dbend
	.dbfunc e SPI_MasterReceive _SPI_MasterReceive fc
	.even
_SPI_MasterReceive::
	.dbline -1
	.dbline 73
; }
; //**SPI_MasterReceive()**//
; unsigned char SPI_MasterReceive(void)
; {
	.dbline 74
;  SPI_MasterTransmit(0x00);
	clr R16
	xcall _SPI_MasterTransmit
	.dbline 75
;  return SPDR;
	in R16,0x2e
	.dbline -2
L19:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e INT_Init _INT_Init fV
	.even
_INT_Init::
	.dbline -1
	.dbline 94
; }
; //**********中断服务程序*********************
; /*#pragma interrupt_handler SPI_ovf_isr:18
; void SPI_ovf_isr(void)
; {
;  unsigned char temp_data;
;  temp_data=SPDR;
;  USART_Transmit(temp_data);
; }*/
; //*************************************************//
; //******************  SPI_over  *******************//
; //*************************************************//
; 
; //*************************************************
; //******************   INT   **********************
; //*************************************************
; //**INT_Init()**//
; void INT_Init()
; {
	.dbline 95
;  DDRD &= ~(1<<DDD2);//clr,input
	cbi 0xa,2
	.dbline 96
;  EICRA |= (1<<ISC01);//h2l trig
	lds R24,105
	ori R24,2
	sts 105,R24
	.dbline 97
;  EIMSK |= (1<<INT0);//set INT0 open
	sbi 0x1d,0
	.dbline -2
L20:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 4
	jmp _INT0_ovf_isr
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\spi\spi_master\spi.c
	.dbfunc e INT0_ovf_isr _INT0_ovf_isr fV
;      temp_data -> R10
	.even
_INT0_ovf_isr::
	xcall push_lset
	st -y,R10
	st -y,R11
	.dbline -1
	.dbline 101
; }
; #pragma interrupt_handler INT0_ovf_isr:2  
; void INT0_ovf_isr(void)
; {
	.dbline 103
;    unsigned char temp_data;
;    temp_data=SPI_MasterReceive();
	xcall _SPI_MasterReceive
	mov R10,R16
	.dbline 104
;    USART_Transmit(temp_data);  
	xcall _USART_Transmit
	.dbline -2
L21:
	.dbline 0 ; func end
	ld R11,y+
	ld R10,y+
	xcall pop_lset
	reti
	.dbsym r temp_data 10 c
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 111
; }
; //*************************************************
; //****************** INT_over *********************
; //*************************************************
; 
; void main(void)
; {
	.dbline 112
;  CLI();
	cli
	.dbline 113
;  INT_Init();
	xcall _INT_Init
	.dbline 114
;  USART_Init();
	xcall _USART_Init
	.dbline 115
;  SPI_MasterInit();
	xcall _SPI_MasterInit
	.dbline 116
;  SEI();
	sei
L23:
	.dbline 119
;  
;  while(1)
;     {
	.dbline 120
;      ;	 
	.dbline 122
; 	 //USART_Transmit(temp_data);
;     }
L24:
	.dbline 118
	xjmp L23
X4:
	.dbline -2
L22:
	.dbline 0 ; func end
	ret
	.dbend
; }