assembly.lis

AVR mage8单片机的bootload程序、完整版本、本人做项目一下在用、此程序为13.56m晶振版本、非常好用

                                .text
                                
                ;*********************************************************
                ; Place a 1 for the processor you want use
                ;*********************************************************
                
 0001           MEGATYPE8   =  1
 0000           MEGATYPE16  =  0
 0000           MEGATYPE32  =  0
 0000           MEGATYPE64  =  0
 0000           MEGATYPE128 =  0
 0000           MEGATYPE162 =  0
 0000           MEGATYPE169 =  0
 0000           MEGATYPE8515 = 0
 0000           MEGATYPE8535 = 0
 0000           MEGATYPE2313 = 0
 0000           
                .if MEGATYPE64 | MEGATYPE128
                    SPMCR = 0x68
                .else
 0057               SPMCR = 0x57
                .endif
                ;-----------------------------------------
                
                ; void write_page (unsigned int adr, unsigned char function);
                ; bits 8:15 adr addresses the page...(must setup RAMPZ beforehand!!!)
 0000           _write_page::
 0000 20D0          XCALL __WAIT_SPMEN__
 0002 F801          movw    r30, r16        ;move address to z pointer (R31 = ZH, R30 = ZL)
 0004 20935700      STS     SPMCR, R18      ;argument 2 decides function
 0008 E895          SPM                     ;perform pagewrite
 000A 0895          RET
 000C           
 000C           ;-----------------------------------------
 000C           
 000C           ; void fill_temp_buffer (unsigned int data, unsigned int adr);
 000C           ; bits 7:1 in adr addresses the word in the page... (2=first word, 4=second word etc..)
 000C           _fill_temp_buffer::
 000C 1AD0          XCALL __WAIT_SPMEN__
 000E F901          movw    r30, r18        ;move adress to z pointer (R31=ZH R30=ZL)
 0010 0801          movw    r0, r16         ;move data to reg 0 and 1
 0012 31E0          LDI     R19, 0x01
 0014 30935700      STS     SPMCR, R19
 0018 E895          SPM                     ;Store program memory,(r31,r30)<--(r1,r0);
 001A 0895          RET      
 001C                   
 001C           ;-----------------------------------------      
 001C           
 001C           ;unsigned int read_program_memory (unsigned int adr ,unsigned char cmd);
 001C           _read_program_memory::
 001C F801          movw    r30, r16        ;move adress to z pointer
 001E 20FD          SBRC    R18, 0          ;read lockbits? (second argument = 0x09)
 0020 20935700      STS     SPMCR, R18      ;if so, place second argument in SPMEN register
 0024           
 0024 0591          LPM     r16, Z+
 0026 1491          LPM     r17, Z
 0028           
 0028 0895          RET
 002A                   
 002A           ;-----------------------------------------
 002A           
 002A           ;void write_lock_bits (unsigned char val);
 002A           _write_lock_bits::
 002A 002E           MOV     R0, R16   
 002C 19E0           LDI     R17, 0x09     
 002E 10935700       STS     SPMCR, R17
 0032 E895           SPM                ;write lockbits
 0034 0895           RET
 0036           
 0036           ;-----------------------------------------
 0036                   
 0036           _enableRWW::
 0036 05D0              XCALL __WAIT_SPMEN__
 0038 B1E1          LDI R27,0x11
 003A B0935700      STS SPMCR,R27
 003E E895          SPM
 0040 0895          RET   
 0042                   
 0042           ;-----------------------------------------           
 0042           
 0042           __WAIT_SPMEN__:
 0042 B0915700      LDS     R27,SPMCR       ; load SPMCR to R27
 0046 B0FD          SBRC    R27,0           ; check SPMEN flag
 0048 FCCF          RJMP    __WAIT_SPMEN__  ; wait for SPMEN flag cleared        
 004A 0895          RET
 004C                   
 004C           ;-----------------------------------------
 004C           
 004C