spi接口发送.lst

来自「ICC mega8例子」· LST 代码 · 共 143 行

__start:
__text_start:
      13 E5CF      LDI	R28,0x5F
      14 E0D4      LDI	R29,4
      15 BFCD      OUT	0x3D,R28
      16 BFDE      OUT	0x3E,R29
      17 51CE      SUBI	R28,0x1E
      18 40D0      SBCI	R29,0
      19 EA0A      LDI	R16,0xAA
      1A 8308      STD	Y+0,R16
      1B 2400      CLR	R0
      1C E6E0      LDI	R30,0x60
      1D E0F0      LDI	R31,0
      1E E010      LDI	R17,0
      1F 36E0      CPI	R30,0x60
      20 07F1      CPC	R31,R17
      21 F011      BEQ	0x0024
      22 9201      ST	R0,Z+
      23 CFFB      RJMP	0x001F
      24 8300      STD	Z+0,R16
      25 E2E6      LDI	R30,0x26
      26 E0F0      LDI	R31,0
      27 E6A0      LDI	R26,0x60
      28 E0B0      LDI	R27,0
      29 E010      LDI	R17,0
      2A E000      LDI	R16,0
      2B BF0B      OUT	0x3B,R16
      2C 32E6      CPI	R30,0x26
      2D 07F1      CPC	R31,R17
      2E F021      BEQ	0x0033
      2F 95C8      LPM
      30 9631      ADIW	R30,1
      31 920D      ST	R0,X+
      32 CFF9      RJMP	0x002C
      33 D01A      RCALL	_main
_exit:
      34 CFFF      RJMP	_exit
FILE: E:\xiaozhiyong2009\设计资料\项目设计\ICCAVR_mega8_C\ICCAVR_mega8_SPI接口发送\SPI接口发送.c
(0001) //ICC-AVR application builder : 2009-3-12 16:45:27
(0002) // Target : M8
(0003) // Crystal: 8.0000Mhz
(0004) 
(0005) #include <iom8v.h>
(0006) #include <macros.h>
(0007) 
(0008) void port_init(void)
(0009) {
(0010)  PORTB = 0x00;
_port_init:
      35 2422      CLR	R2
      36 BA28      OUT	0x18,R2
(0011)  DDRB  = 0x00;
      37 BA27      OUT	0x17,R2
(0012)  PORTC = 0x00; //m103 output only
      38 BA25      OUT	0x15,R2
(0013)  DDRC  = 0x00;
      39 BA24      OUT	0x14,R2
(0014)  PORTD = 0x00;
      3A BA22      OUT	0x12,R2
(0015)  DDRD  = 0x00;
      3B BA21      OUT	0x11,R2
      3C 9508      RET
(0016) }
(0017) 
(0018) //call this routine to initialize all peripherals
(0019) void init_devices(void)
(0020) {
(0021)  //stop errant interrupts until set up
(0022)  CLI(); //disable all interrupts
_init_devices:
      3D 94F8      BCLR	7
(0023)  port_init();
      3E DFF6      RCALL	_port_init
(0024) 
(0025)  MCUCR = 0x00;
      3F 2422      CLR	R2
      40 BE25      OUT	0x35,R2
(0026)  GICR  = 0x00;
      41 BE2B      OUT	0x3B,R2
(0027)  TIMSK = 0x00; //timer interrupt sources
      42 BE29      OUT	0x39,R2
(0028)  SEI(); //re-enable interrupts
      43 9478      BSET	7
      44 9508      RET
(0029)  //all peripherals are now initialized
(0030) }
(0031) 
(0032) //*******************************spi_master*****************************
(0033) /***********************************************************
(0034) 用    途:SPI主从式发送
(0035) Taget   :mega8
(0036) crystal :8M
(0037) 介    绍:PB2-SS,PB3-MOSI,PB4-MISO,PB5-SCK
(0038)          从机的SS要接地
(0039) **********************************************************/
(0040) void spi_master_init()
(0041) {
(0042)  //DDR_SPI=(1<<DD_MOSI)|(1<<DD_SCK)
(0043)  DDRB=(1<<3)|(1<<5)|(1<<2);
_spi_master_init:
      45 E28C      LDI	R24,0x2C
      46 BB87      OUT	0x17,R24
(0044)  //使能SPI，master,fck/16
(0045)  SPCR=(1<<SPE)|(1<<MSTR)|(1<<SPR1);
      47 E582      LDI	R24,0x52
      48 B98D      OUT	0x0D,R24
      49 9508      RET
(0046) }
(0047) //发送数据
(0048) void spi_master_putc(unsigned char cData)
(0049) {
(0050)  SPDR=cData;//发送数据
_spi_master_putc:
  cData                --> R16
      4A B90F      OUT	0x0F,R16
(0051)  while(!(SPSR&(1<<SPIF)))
      4B 9B77      SBIS	0x0E,7
      4C CFFE      RJMP	0x004B
      4D 9508      RET
(0052)  {;}
(0053) }
(0054) //*********************************************************************
(0055) 
(0056) void main()
(0057) {
(0058)  port_init();
_main:
      4E DFE6      RCALL	_port_init
(0059)  init_devices();
      4F DFED      RCALL	_init_devices
(0060)  
(0061)  spi_master_init();
      50 DFF4      RCALL	_spi_master_init
      51 C002      RJMP	0x0054
(0062)  while(1)
(0063)  {
(0064)   spi_master_putc(0x54);
FILE: <library>
      52 E504      LDI	R16,0x54
      53 DFF6      RCALL	_spi_master_putc
      54 CFFD      RJMP	0x0052
      55 9508      RET