usart.lst

ad7135的avr16的源程序

__start:
__text_start:
    002A E5CF      LDI	R28,0x5F
    002B E0D4      LDI	R29,4
    002C BFCD      OUT	0x3D,R28
    002D BFDE      OUT	0x3E,R29
    002E 51C0      SUBI	R28,0x10
    002F 40D0      SBCI	R29,0
    0030 EA0A      LDI	R16,0xAA
    0031 8308      STD	Y+0,R16
    0032 2400      CLR	R0
    0033 E6E0      LDI	R30,0x60
    0034 E0F0      LDI	R31,0
    0035 E010      LDI	R17,0
    0036 36E0      CPI	R30,0x60
    0037 07F1      CPC	R31,R17
    0038 F011      BEQ	0x003B
    0039 9201      ST	R0,Z+
    003A CFFB      RJMP	0x0036
    003B 8300      STD	Z+0,R16
    003C E5E4      LDI	R30,0x54
    003D E0F0      LDI	R31,0
    003E E6A0      LDI	R26,0x60
    003F E0B0      LDI	R27,0
    0040 E010      LDI	R17,0
    0041 35E4      CPI	R30,0x54
    0042 07F1      CPC	R31,R17
    0043 F021      BEQ	0x0048
    0044 95C8      LPM
    0045 9631      ADIW	R30,1
    0046 920D      ST	R0,X+
    0047 CFF9      RJMP	0x0041
    0048 940E0062  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
FILE: usart.c
(0001)  /*上位机发送一个数据，下位返回相同的数据,在中断中接收数据，并发送数据*/
(0002) #include <iom16v.h>
(0003) #include <macros.h>
(0004) void usart_init(void)
(0005) {	 
(0006) 	 UBRR=0X33;//fosc=8mhz,波特率9600
_usart_init:
    004B E383      LDI	R24,0x33
    004C B989      OUT	0x09,R24
(0007) 	 UCSRA=0X20;
    004D E280      LDI	R24,0x20
    004E B98B      OUT	0x0B,R24
(0008) 	 UCSRC=0X86;
    004F E886      LDI	R24,0x86
    0050 BD80      OUT	0x20,R24
(0009) 	 UCSRB=0X98;
    0051 E988      LDI	R24,0x98
    0052 B98A      OUT	0x0A,R24
    0053 9508      RET
_usart_receive:
  d                    --> R16
    0054 930A      ST	R16,-Y
    0055 938A      ST	R24,-Y
    0056 B70F      IN	R16,0x3F
    0057 930A      ST	R16,-Y
(0010) }
(0011) #pragma interrupt_handler usart_receive:12
(0012) void usart_receive(void)
(0013) {	 
(0014) 	 unsigned char d;
(0015) 	 d=UDR;
    0058 B10C      IN	R16,0x0C
(0016) 	 UDR=0xff;
    0059 EF8F      LDI	R24,0xFF
    005A B98C      OUT	0x0C,R24
(0017) 	 while(!(UCSRA&(1<<TXC)))
    005B 9B5E      SBIS	0x0B,6
    005C CFFE      RJMP	0x005B
    005D 9109      LD	R16,Y+
    005E BF0F      OUT	0x3F,R16
    005F 9189      LD	R24,Y+
    0060 9109      LD	R16,Y+
    0061 9518      RETI
(0018) 	 ;
(0019) 	 
(0020) }
(0021) void main(void)
(0022) {	 
(0023) 	 CLI();
_main:
    0062 94F8      BCLR	7
(0024) 	 usart_init();
    0063 DFE7      RCALL	_usart_init
(0025) 	 SEI();
    0064 9478      BSET	7
(0026) 	 while(1);
FILE: <library>
    0065 CFFF      RJMP	0x0065
    0066 9508      RET