init.s

来自「uart 试验 点燃led 2440 面向初学者」· S 代码 · 共 55 行

ULCON0     EQU 0x50000000
UCON0      EQU  0x50000004
UFCON0     EQU  0x50000008
UMCON0     EQU 0x5000000C



UBRDIV0    EQU  0x50000028
GPHCON     EQU  0x56000070
GPHUP      EQU  0x56000078

  
   
  IMPORT Main
  AREA Init,CODE,READONLY
  ENTRY
  LDR R0,=0x3ff0000
  LDR R1,=0xE7FFFF80
  STR R1,[R0]
     LDR SP,=0x3FE1000
     
  
  
    LDR R0,=0x50000000
  LDR R1,=0x03
  STR R1,[R0]
  
    LDR R0,=0x50000004
  LDR R1,=0x05
  STR R1,[R0]
  
    LDR R0,=0x50000008
  LDR R1,=0x00
  STR R1,[R0]
  
    LDR R0,=0x5000000c
  LDR R1,=0x00
  STR R1,[R0]
  
    LDR R0,=0x50000028
  LDR R1,=0x00
  STR R1,[R0]
  
    LDR R0,=0x56000078
  LDR R1,=0x0c
  STR R1,[R0]
  
    LDR R0,=0x56000070
  LDR R1,=0x0a
  STR R1,[R0]

    
  BL Main
  B  .
  END