Keil C51 V9.53 uVision5开发工具 更新日志（2014年8月）：

Release Date: 5 August 2014

• [LX51 Linker/Locater]
  • Implemented: the PUBLICSONLY Linker directive. 
    The generated objectfile contains only public symbol information from the inputfile.
  • Enhanced: LX51 code optimization now removes common blocks for unused functions. Example: 
    

    unsigned char a, b, c;
    unsigned char darr [0x10];
    
    void FuncA (void) {
      darr[c] = darr[b];
    }
    
    void FuncB (void) {
      darr[c] = darr[b];
    }
    
    void FuncC (void) {
      darr[c] = darr[a] + darr[b];
    }
    
    void FuncD (void) {
      darr[c] = darr[a] + darr[b];
    }
    
    void main(void) {
      FuncA ();
      FuncB ();
      while(1);
    }
    
    
    ; FUNCTION FuncA (BEGIN)           ; FUNCTION FuncB (BEGIN)            ; FUNCTION FuncC (BEGIN)                ; FUNCTION FuncD (BEGIN)          
        R     MOV     A,#LOW darr          R     MOV     A,#LOW darr           R     MOV     A,#LOW darr ----- + ----- R     MOV     A,#LOW darr     
        R     ADD     A,b                  R     ADD     A,b                   R     ADD     A,b               |       R     ADD     A,b             
              MOV     R0,A     ----- + -----     MOV     R0,A                        MOV     R0,A              |             MOV     R0,A            
              MOV     A,@R0          |           MOV     A,@R0                       MOV     A,@R0             |             MOV     A,@R0           
              MOV     R7,A           |           MOV     R7,A                        MOV     R7,A              |             MOV     R7,A            
        R     MOV     A,#LOW darr    |     R     MOV     A,#LOW darr           R     MOV     A,#LOW darr ----- + ----- R     MOV     A,#LOW darr     
        R     ADD     A,c            |     R     ADD     A,c                   R     ADD     A,a               |       R     ADD     A,a             
              MOV     R0,A           |           MOV     R0,A                        MOV     R0,A              |             MOV     R0,A            
              MOV     @R0,AR7  ----- + -----     MOV     @R0,AR7                     MOV     A,@R0             |             MOV     A,@R0           
              RET                    |           RET                                 ADD     A,R7              |             ADD     A,R7            
                                     o-> Common code for FuncA and FuncB             MOV     R7,A              |             MOV     R7,A            
                                                                               R     MOV     A,#LOW darr       |       R     MOV     A,#LOW darr     
                                                                               R     ADD     A,c               |       R     ADD     A,c             
                                                                                     MOV     R0,A              |             MOV     R0,A            
                                                                                     MOV     @R0,AR7           |             MOV     @R0,AR7         
                                                                                     RET                       |             RET                     
                                                                                                               o-> Common code for FuncC and FuncD   
    

    In the example above the functions FuncC() and FuncD() are removed when the REMOVEUNUSED linker directive is specified. Now, the first part of the common code block (FUNCTION ?L?COM0001) is no longer necessary. In previous verions this was still part of the image. With the new linker enhancement even this code block is removed.

    ----- FUNCTION ?L?COM0001 (BEGIN) -----                                                                  
    000021 7408              MOV      A,#LOW darr  ---+                                                      
    000023 2519              ADD      A,b             |\                                                     
    000025 F8                MOV      R0,A            | \                                                    
    000026 E6                MOV      A,@R0           |  o-> Common code for FuncC and FuncD                 
    000027 FF                MOV      R7,A            |                                                      
    000028 7408              MOV      A,#LOW darr  ---+                                                      
    00002A         ?L?COM0002:                                                                               
    00002A F8                MOV      R0,A         ---+                                                      
    00002B E6                MOV      A,@R0           |\                                                     
    00002C FF                MOV      R7,A            | \                                                    
    00002D 7408              MOV      A,#LOW darr     |  o-> Common code for FuncA and FuncB                 
    00002F 251A              ADD      A,c             |                                                      
    000031 F8                MOV      R0,A            |                                                      
    000032 A607              MOV      @R0,AR7      ---+                                                      
    000034 22                RET                                                                             
    ----- FUNCTION ?L?COM0001 (END) -------                                                                  
    
    

• [AX51 Assembler]
  • Enhanced: SEGMENT assembler statement now also supports ALIGN (1) as minimum alignment value.
• [New Supported Devices]
  • CAST
    R8051XC3.
  • Maxim
    78M6613.
  • SigmaDesigns
    ZM3102, ZM4102, ZM4101, and SD3402.
  • Silabs
    C8051F970-A-GM, C8051F971-A-GM, C8051F972-A-GM, C8051F973-A-GM, C8051F974-A-GM, C8051F975-A-GM, 
    C8051F370, C8051F371, C8051F374, C8051F375, 
    C8051F388, C8051F389, C8051F38A, C8051F38B, C8051F38C, 
    C8051F390, C8051F391, C8051F392, C8051F393, C8051F394, C8051F395, C8051F396, C8051F397, C8051F398,C8051F399, 
    C8051F750, C8051F750B, C8051F751, C8051F751B, C8051F752, C8051F752B, C8051F755B, C8051F756B,C8051F757B, 
    C8051F760, C8051F761, C8051F762, C8051F765, C8051F766, C8051F767, 
    C8051T626, C8051T627, C8051T670, and C8051T671.
  • Texas Instruments
    CC2541F128, CC2541F256, CC2543, CC2544, and CC2545.
  • Vitesse
    VSC7388, VSC7389, VSC7390, VSC7391, VSC7395, VSC7420, and VSC7422.
• [ÂμVision]
  • This C51 release comes with ÂμVision V5.11.2.0.