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_slave\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_slave\spi.c
	.dbfunc e PORT_Init _PORT_Init fV
	.even
_PORT_Init::
	.dbline -1
	.dbline 14
; // **************************************************************
; // ***         实验：        SPI Interface Slave              ***
; // ***                       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>
; 
; //**PORT_Init()**//
; void PORT_Init()
; {
	.dbline 15
;  DDRD |=(1<<DDD7);//Interrupt output
	sbi 0xa,7
	.dbline 16
;  PORTD |=(1<<PORTD7);//set high
	sbi 0xb,7
	.dbline -2
L9:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e USART_Init _USART_Init fV
	.even
_USART_Init::
	.dbline -1
	.dbline 30
; }
; 
; //*************************************************
; //******************  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 31
;   USART_DDR |=(1<<DDR_TX);   //set TX output
	sbi 0xa,1
	.dbline 32
;   USART_PORT |=(1<<USART_RX);  //RX pull up 
	sbi 0xb,0
	.dbline 34
;    
;   UCSR0B = 0x00; //设置波特率之前先关闭串口
	clr R2
	sts 193,R2
	.dbline 35
;   UCSR0A = 0x00;
	sts 192,R2
	.dbline 36
;   UBRR0H=0;
	sts 197,R2
	.dbline 37
;   UBRR0L=51;
	ldi R24,51
	sts 196,R24
	.dbline 39
;   //UCSR0B=(1<<RXEN0)|(1<<TXEN0)|(1<<RXCIE0);//enable
;   UCSR0B=(1<<RXEN0)|(1<<TXEN0);
	ldi R24,24
	sts 193,R24
	.dbline 40
;   UCSR0C=(1<<UCSZ00)|(1<<UCSZ01);//8 data,1 stop 
	ldi R24,6
	sts 194,R24
	.dbline -2
L10:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e USART_Transmit _USART_Transmit fV
;           data -> R16
	.even
_USART_Transmit::
	.dbline -1
	.dbline 44
; }
; //***************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 
;  { 
L12:
	.dbline 46
;   while( !(UCSR0A & (1<<UDRE0)))     //等待发送缓冲区为空
;         ;                   
L13:
	.dbline 45
	lds R2,192
	sbrs R2,5
	rjmp L12
X2:
	.dbline 47
;   UDR0 = data;
	sts 198,R16
	.dbline -2
L11:
	.dbline 0 ; func end
	ret
	.dbsym r data 16 c
	.dbend
	.dbfunc e SPI_SlaveInit _SPI_SlaveInit fV
	.even
_SPI_SlaveInit::
	.dbline -1
	.dbline 63
;  }   
; //*************************************************
; //**************** 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_SS PORTB2
; //**SPI_SlaveInit()**//
; void SPI_SlaveInit(void)
; {
	.dbline 64
;  DDRB = (1<<DDR_MISO);//设置MISO 为输出，其他为输入
	ldi R24,16
	out 0x4,R24
	.dbline 65
;  SPCR = (1<<SPE)|(1<<SPIE);//enable SPI,SPI interrupt
	ldi R24,192
	out 0x2c,R24
	.dbline -2
L15:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e SPI_SlaveTransmit _SPI_SlaveTransmit fV
;          cData -> R10
	.even
_SPI_SlaveTransmit::
	st -y,R10
	st -y,R11
	mov R10,R16
	.dbline -1
	.dbline 69
; }
; //**SPI_SlaveTransmit()**//
; void SPI_SlaveTransmit(unsigned char cData)
; {
	.dbline 70
;     SPDR=cData;
	out 0x2e,R10
	.dbline 71
; 	PORTD &= ~(1<<PORTD7);//clr
	cbi 0xb,7
	.dbline 72
; 	Delayms(10);
	ldi R16,10
	ldi R17,0
	xcall _Delayms
	.dbline 73
; 	PORTD |= (1<<PORTD7);//set
	sbi 0xb,7
	.dbline 74
; 	Delayms(10);
	ldi R16,10
	ldi R17,0
	xcall _Delayms
	.dbline -2
L16:
	.dbline 0 ; func end
	ld R11,y+
	ld R10,y+
	ret
	.dbsym r cData 10 c
	.dbend
	.dbfunc e SPI_SlaveReceive _SPI_SlaveReceive fc
	.even
_SPI_SlaveReceive::
	.dbline -1
	.dbline 78
; }
; //**SPI_SlaveReceive()**//
; unsigned char SPI_SlaveReceive(void)
; {
L18:
	.dbline 80
;  while(!(SPSR & (1<<SPIF)))//等待接收结束
;        ;
L19:
	.dbline 79
	in R2,0x2d
	sbrs R2,7
	rjmp L18
X3:
	.dbline 81
;  return SPDR;//返回数据
	in R16,0x2e
	.dbline -2
L17:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 68
	jmp _SPI_ovf_isr
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\spi\spi_slave\spi.c
	.dbfunc e SPI_ovf_isr _SPI_ovf_isr fV
;      temp_data -> R10
	.even
_SPI_ovf_isr::
	xcall push_lset
	st -y,R10
	st -y,R11
	.dbline -1
	.dbline 86
; }
; //**********中断服务程序*********************
; #pragma interrupt_handler SPI_ovf_isr:18
; void SPI_ovf_isr(void)
; {
	.dbline 88
;  unsigned char temp_data;
;  temp_data=SPI_SlaveReceive();
	xcall _SPI_SlaveReceive
	mov R10,R16
	.dbline 89
;  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
;            num -> R20,R21
	.even
_main::
	.dbline -1
	.dbline 95
; }
; //*************************************************
; //******************  SPI_over  *******************
; //*************************************************
; void main(void)
; {
	.dbline 96
;  unsigned int num=0;
	clr R20
	clr R21
	.dbline 98
;  
;  CLI();
	cli
	.dbline 99
;  PORT_Init();
	xcall _PORT_Init
	.dbline 100
;  USART_Init();
	xcall _USART_Init
	.dbline 101
;  SPI_SlaveInit();
	xcall _SPI_SlaveInit
	.dbline 102
;  SEI();
	sei
	xjmp L24
L23:
	.dbline 105
; 
;  while(1)
;       {
	.dbline 110
; 	   //PORTB &= ~(1<<PORTB0);//clr
; 	   //Delayms(1);
; 	   //PORTB |= (1<<PORTB0);//set
; 	   //Delayms(1);
; 	   SPI_SlaveTransmit(num++);
	movw R2,R20
	subi R20,255  ; offset = 1
	sbci R21,255
	mov R16,R2
	xcall _SPI_SlaveTransmit
	.dbline 111
; 	   Delayms(10);
	ldi R16,10
	ldi R17,0
	xcall _Delayms
	.dbline 112
; 	   if(num==0xFF)
	cpi R20,255
	ldi R30,0
	cpc R21,R30
	brne L26
X4:
	.dbline 113
; 	         num=0;
	clr R20
	clr R21
L26:
	.dbline 114
; 	  }
L24:
	.dbline 104
	xjmp L23
X5:
	.dbline -2
L22:
	.dbline 0 ; func end
	ret
	.dbsym r num 20 i
	.dbend
; }