uart_led.lst

这是关于AVR单片机学习的初步开发

__text_start:
__start:
    0013 E5CF      LDI	R28,0x5F
    0014 E0D4      LDI	R29,4
    0015 BFCD      OUT	0x3D,R28
    0016 BFDE      OUT	0x3E,R29
    0017 51C0      SUBI	R28,0x10
    0018 40D0      SBCI	R29,0
    0019 EA0A      LDI	R16,0xAA
    001A 8308      STD	Y+0,R16
    001B 2400      CLR	R0
    001C E6E0      LDI	R30,0x60
    001D E0F0      LDI	R31,0
    001E E010      LDI	R17,0
    001F 36E0      CPI	R30,0x60
    0020 07F1      CPC	R31,R17
    0021 F011      BEQ	0x0024
    0022 9201      ST	R0,Z+
    0023 CFFB      RJMP	0x001F
    0024 8300      STD	Z+0,R16
    0025 E2E6      LDI	R30,0x26
    0026 E0F0      LDI	R31,0
    0027 E6A0      LDI	R26,0x60
    0028 E0B0      LDI	R27,0
    0029 E010      LDI	R17,0
    002A 32E6      CPI	R30,0x26
    002B 07F1      CPC	R31,R17
    002C F021      BEQ	0x0031
    002D 95C8      LPM
    002E 9631      ADIW	R30,1
    002F 920D      ST	R0,X+
    0030 CFF9      RJMP	0x002A
    0031 D029      RCALL	_main
_exit:
    0032 CFFF      RJMP	_exit
FILE: C:\DOCUME~1\alf\MYDOCU~1\开发板\调试程序\uart\uart.c
(0001) //ICC-AVR application builder : 2005-3-8 下午 09:54:40
(0002) // Target : M8
(0003) // Crystal: 11.059Mhz
(0004) 
(0005) #include <iom8v.h>
(0006) #include <macros.h>
(0007) 
(0008) void port_init(void)
(0009) {
(0010)  PORTB = 0xFF;
_port_init:
    0033 EF8F      LDI	R24,0xFF
    0034 BB88      OUT	0x18,R24
(0011)  DDRB  = 0x00;
    0035 2422      CLR	R2
    0036 BA27      OUT	0x17,R2
(0012)  PORTC = 0x7F; //m103 output only
    0037 E78F      LDI	R24,0x7F
    0038 BB85      OUT	0x15,R24
(0013)  DDRC  = 0x00;
    0039 BA24      OUT	0x14,R2
(0014)  PORTD = 0xFF;
    003A EF8F      LDI	R24,0xFF
    003B BB82      OUT	0x12,R24
(0015)  DDRD  = 0x00;
    003C BA21      OUT	0x11,R2
(0016) }
    003D 9508      RET
(0017) 
(0018) //UART0 initialisation
(0019) // desired baud rate: 9600
(0020) // actual: baud rate:9600 (0.0%)
(0021) // char size: 8 bit
(0022) // parity: Disabled
(0023) void uart0_init(void)
(0024) {
(0025)  UCSRB = 0x00; //disable while setting baud rate
_uart0_init:
    003E 2422      CLR	R2
    003F B82A      OUT	0x0A,R2
(0026)  UCSRA = 0x00;
    0040 B82B      OUT	0x0B,R2
(0027)  UCSRC = 0x86;
    0041 E886      LDI	R24,0x86
    0042 BD80      OUT	0x20,R24
(0028)  UBRRL = 0x47; //set baud rate lo
    0043 E487      LDI	R24,0x47
    0044 B989      OUT	0x09,R24
(0029)  UBRRH = 0x00; //set baud rate hi
    0045 BC20      OUT	0x20,R2
(0030)  UCSRB = 0x98;
    0046 E988      LDI	R24,0x98
    0047 B98A      OUT	0x0A,R24
(0031) }
    0048 9508      RET
_uart0_rx_isr:
  temp                 --> R16
    0049 930A      ST	R16,-Y
    004A B70F      IN	R16,0x3F
    004B 930A      ST	R16,-Y
(0032) 
(0033) #pragma interrupt_handler uart0_rx_isr:12
(0034) void uart0_rx_isr(void)
(0035) {
(0036)  //uart has received a character in UDR
(0037)  char temp;
(0038)  temp = UDR;
    004C B10C      IN	R16,0x0C
(0039)  UDR = temp;
    004D B90C      OUT	0x0C,R16
(0040) }
    004E 9109      LD	R16,Y+
    004F BF0F      OUT	0x3F,R16
    0050 9109      LD	R16,Y+
    0051 9518      RETI
(0041) 
(0042) //call this routine to initialise all peripherals
(0043) void init_devices(void)
(0044) {
(0045)  //stop errant interrupts until set up
(0046)  CLI(); //disable all interrupts
_init_devices:
    0052 94F8      BCLR	7
(0047)  port_init();
    0053 DFDF      RCALL	_port_init
(0048)  uart0_init();
    0054 DFE9      RCALL	_uart0_init
(0049) 
(0050)  MCUCR = 0x00;
    0055 2422      CLR	R2
    0056 BE25      OUT	0x35,R2
(0051)  GICR  = 0x00;
    0057 BE2B      OUT	0x3B,R2
(0052)  TIMSK = 0x00; //timer interrupt sources
    0058 BE29      OUT	0x39,R2
(0053)  SEI(); //re-enable interrupts
    0059 9478      BSET	7
(0054)  //all peripherals are now initialised
(0055) }
    005A 9508      RET
(0056) 
(0057) //
(0058) void main(void)
(0059) {
(0060)  init_devices();
_main:
    005B DFF6      RCALL	_init_devices
(0061)  //insert your functional code here...
(0062)  while(1);
    005C CFFF      RJMP	0x005C
(0063) }
FILE: <library>
    005D 9508      RET