3.汇编语言程序设计课件.ppt

第3章 汇编语言程序设计;3.1 汇编源程序格式;3.2 汇编器及其调用;3.3 汇编语言中的常数与字符串;IEEE双精度浮点表示法 P242;3.4 汇编伪指令 P236;.bss .usect;烫妙兰悔孵仇呈效拼父料边豢党岗宗搐侈寓解契穆少歉吞郎市勾令农丢孔3.汇编语言程序设计课件3.汇编语言程序设计课件;链接器的对段的处理;CMD文件的编写;SECTIONS伪指令的语法： SECTIONS { .text: [load=ROM] [run=…addr] .vectors: [load=ONCHIP] [run=…addr] };例子： MEMORY { PAGE 0: VECS: org=0x0080,len=0x80 PROM: org=0x1000,len=0x1000 /* 4k words */ PAGE 1: STACK: org=0x100, len=0x400 /* 1k words */ DARAM: org=0x2000,len=0x1000 /* 4k words */ } ;SECTIONS { .text : PROM PAGE 0 vectors: VECS PAGE 0 .bss : DARAM PAGE 1 } ;2、初始化常数的伪指令 不确定位数： .bes 和 .space .field 8位： .byte, .ubyte, .char, .uchar 16位： .int, .uint, .half,.uhalf, .short, .ushort, .word, .uword 32位： .long, .ulong, .xlong .string , .pstring .float, .xfloat .double, .ldouble ;3.对准段程序计数器的伪指令;4.输出清单文件的格式化指令;5. 引用其他文件的伪指令;6.条件汇编伪指令;往可诚腮篙婪吝夫冬讹讽券父砂醒搞螺粕融碧膝驶凉讣郴栽泉主几癸沂滇3.汇编语言程序设计课件3.汇编语言程序设计课件;8. 混和伪指令;.mmregs定义的片外映像寄存器;SWCR 2Bh External Bus Software wait-state control register HPIC 2Ch HPI HPI control register 2Dh-2Fh Reserved TIM1 30h Timer1 Timer1 register PRD1 31h Timer1 Timer1 period counter TCR1 32h Timer1 Timer1 control register 33h-37h Reserved SPSA0 38h McBSP #0 McBSP0 subbank address register SPSD0 39h McBSP #0 McBSP0 subbank data register 3Ah-3Bh Reserved GPIOCR 3Ch GPIO General-purpose I/O pins control register GPIOSR 3Dh GPIO General-purpose I/O pins status register 3Eh-3Fh Reserved;DRR21 40h McBSP #1 McBSP1 data receive register 2 DRR11 41h McBSP #1 McBSP1 data receive register 1 DXR21 42h McBSP #1 McBSP1 data transmit register 2 DXR11 43h McBSP #1 McBSP1 data transmit register 1 44h-47h Reserved SPSA1 48h McBSP #1 McBSP1 subbank address register SPSD1 49h McBSP #1 McBSP1 subbank data register 4Ah-53h Reserved DMPREC 54h DMA DMA channel priority and enable control register DMSA 55h DMA DMA subbank address register DMSDI 56h DMA DMA subbank data register with autoincrement DMSDN 57h D