avr-bootloader.lst

ATMEG128在线升级程序,运行稳定可靠

__start:
__text_start:
    FC68 E001      LDI	R16,1
    FC69 BF05      OUT	0x35,R16
    FC6A E002      LDI	R16,2
    FC6B BF05      OUT	0x35,R16
    FC6C EFCF      LDI	R28,0xFF
    FC6D E1D0      LDI	R29,0x10
    FC6E BFCD      OUT	0x3D,R28
    FC6F BFDE      OUT	0x3E,R29
    FC70 51CE      SUBI	R28,0x1E
    FC71 40D0      SBCI	R29,0
    FC72 EA0A      LDI	R16,0xAA
    FC73 8308      STD	Y+0,R16
    FC74 2400      CLR	R0
    FC75 E0E4      LDI	R30,4
    FC76 E0F1      LDI	R31,1
    FC77 E012      LDI	R17,2
    FC78 30E4      CPI	R30,4
    FC79 07F1      CPC	R31,R17
    FC7A F011      BEQ	0xFC7D
    FC7B 9201      ST	R0,Z+
    FC7C CFFB      RJMP	0xFC78
    FC7D 8300      STD	Z+0,R16
    FC7E ECEC      LDI	R30,0xCC
    FC7F EFF8      LDI	R31,0xF8
    FC80 E0A0      LDI	R26,0
    FC81 E0B1      LDI	R27,1
    FC82 EF18      LDI	R17,0xF8
    FC83 E001      LDI	R16,1
    FC84 BF0B      OUT	0x3B,R16
    FC85 3DE0      CPI	R30,0xD0
    FC86 07F1      CPC	R31,R17
    FC87 F021      BEQ	0xFC8C
    FC88 95D8      ELPM
    FC89 9631      ADIW	R30,1
    FC8A 920D      ST	R0,X+
    FC8B CFF9      RJMP	0xFC85
    FC8C 940E FD63 CALL	_main
_exit:
    FC8E CFFF      RJMP	_exit
_boot_page_ew:
  code                 --> Y,+4
  p_address            --> Y,+0
    FC8F 940E FE33 CALL	push_arg4
FILE: E:\项目\程序\Bootloader程序\AVR-Bootloader\AVR-Bootloader.c
(0001) #include <iom128v.h>
(0002) #define SPM_PAGESIZE 256
(0003) 
(0004) #define BAUD_H 0x00
(0005) #define BAUD_L 0x17
(0006) #define DATA_BUFFER_SIZE SPM_PAGESIZE
(0007) 
(0008) //定义Xmodem控制字符
(0009) #define XMODEM_NUL 0x00
(0010) #define XMODEM_SOH 0x01
(0011) #define XMODEM_STX 0x02
(0012) #define XMODEM_EOT 0x04
(0013) #define XMODEM_ACK 0x06
(0014) #define XMODEM_NAK 0x15
(0015) #define XMODEM_CAN 0x18
(0016) #define XMODEM_EOF 0x1A
(0017) #define XMODEM_RECIEVING_WAIT_CHAR 'C'
(0018) 
(0019) //定义全局变量
(0020) //const char startupString[]="Type 'd' download,Others run app.\n\r\0";
(0021) const char startupString[]="Please press 'd' to bootloader within 3 seconds![Encrypted!]\n\r\0";
(0022) char data[DATA_BUFFER_SIZE];
(0023) long address=0;
(0024) 
(0025) //擦除(code==0x03)和写入(code==0x05)一个Flash页
(0026) void boot_page_ew(long p_address,char code)
(0027) {
(0028)  asm("mov r30,r16\n"
    FC91 2FE0      MOV	R30,R16
    FC92 2FF1      MOV	R31,R17
    FC93 BF2B      OUT	0x3B,R18
(0029)      "mov r31,r17\n"
(0030) 	 "out 0x3b,r18\n");
(0031)  SPMCSR=code;
    FC94 800C      LDD	R0,Y+4
    FC95 9200 0068 STS	0x0068,R0
(0032)  asm("spm\n");
    FC97 95E8      SPM
    FC98 9624      ADIW	R28,4
    FC99 9508      RET
_boot_page_fill:
  data                 --> Y,+2
  address              --> Y,+0
    FC9A 940E FE33 CALL	push_arg4
(0033) }
(0034) //填充Flash缓冲页中的一个字
(0035) void boot_page_fill(unsigned int address,int data)
(0036) {
(0037)  asm("mov r30,r16\n"
    FC9C 2FE0      MOV	R30,R16
    FC9D 2FF1      MOV	R31,R17
    FC9E 2E02      MOV	R0,R18
    FC9F 2E13      MOV	R1,R19
(0038)      "mov r31,r17\n"
(0039) 	 "mov r0,r18\n"
(0040) 	 "mov r1,r19\n");
(0041)  SPMCSR=0x01;
    FCA0 E081      LDI	R24,1
    FCA1 9380 0068 STS	0x0068,R24
(0042)  asm("spm\n");
    FCA3 95E8      SPM
    FCA4 9624      ADIW	R28,4
    FCA5 9508      RET
(0043) }
(0044) //等待一个Flash页的写完成
(0045) void wait_page_rw_ok(void)
(0046) {
_wait_page_rw_ok:
    FCA6 C008      RJMP	0xFCAF
(0047) 	while(SPMCSR&0x40)
(0048) 	{
(0049) 		while(SPMCSR&0x01);
    FCA7 9020 0068 LDS	R2,0x0068
    FCA9 FC20      SBRC	R2,0
    FCAA CFFC      RJMP	0xFCA7
(0050) 		SPMCSR=0x11;
    FCAB E181      LDI	R24,0x11
    FCAC 9380 0068 STS	0x0068,R24
(0051) 		asm("spm\n");
    FCAE 95E8      SPM
    FCAF 9020 0068 LDS	R2,0x0068
    FCB1 FC26      SBRC	R2,6
    FCB2 CFF4      RJMP	0xFCA7
    FCB3 9508      RET
_de_encryptdata:
  tmpchrL              --> R10
  tmpchrH              --> R22
  chr                  --> R20
  i                    --> R16
    FCB4 940E FE42 CALL	push_xgsetF00C
(0052) 	}
(0053) }
(0054) ///对BIN文件的数据进行解密
(0055) char de_encryptdata(char i)
(0056) {	
(0057) 	char chr,tmpchrH,tmpchrL;
(0058) 	chr=data[i];
    FCB6 E084      LDI	R24,4
    FCB7 E091      LDI	R25,1
    FCB8 2FE0      MOV	R30,R16
    FCB9 27FF      CLR	R31
    FCBA 0FE8      ADD	R30,R24
    FCBB 1FF9      ADC	R31,R25
    FCBC 8140      LDD	R20,Z+0
(0059) 	tmpchrH=0xf0&chr;
    FCBD 2F64      MOV	R22,R20
    FCBE 7F60      ANDI	R22,0xF0
(0060) 	tmpchrL=0x0f&chr;
    FCBF 2F84      MOV	R24,R20
    FCC0 708F      ANDI	R24,0xF
    FCC1 2EA8      MOV	R10,R24
(0061) 	chr=tmpchrH/16+tmpchrL*16;
    FCC2 E180      LDI	R24,0x10
    FCC3 9D8A      MUL	R24,R10
    FCC4 2F46      MOV	R20,R22
    FCC5 9542      SWAP	R20
    FCC6 704F      ANDI	R20,0xF
    FCC7 0D40      ADD	R20,R0
(0062) 	return (0xff-0x86^chr);		
    FCC8 E789      LDI	R24,0x79
    FCC9 2F04      MOV	R16,R20
    FCCA 2708      EOR	R16,R24
    FCCB 940C FE49 JMP	pop_xgsetF00C
_write_one_page:
  i                    --> R20
    FCCD 934A      ST	R20,-Y
    FCCE 935A      ST	R21,-Y
    FCCF 9721      SBIW	R28,1
(0063) }
(0064) //更新一个Flash页的完整处理
(0065) void write_one_page(void)
(0066) {
(0067) 	int i;
(0068) 	boot_page_ew(address,0x03);
    FCD0 E083      LDI	R24,3
    FCD1 8388      STD	Y+0,R24
    FCD2 9120 0102 LDS	R18,address+2
    FCD4 9130 0103 LDS	R19,address+3
    FCD6 9100 0100 LDS	R16,address
    FCD8 9110 0101 LDS	R17,address+1
    FCDA DFB4      RCALL	_boot_page_ew
(0069) 	wait_page_rw_ok();
    FCDB DFCA      RCALL	_wait_page_rw_ok
(0070) 	for(i=0;i<SPM_PAGESIZE;i+=2)
    FCDC 2744      CLR	R20
    FCDD 2755      CLR	R21
(0071) 	{
(0072) 		boot_page_fill(i,de_encryptdata(i)+(de_encryptdata(i+1)<<8));
    FCDE 2F04      MOV	R16,R20
    FCDF DFD4      RCALL	_de_encryptdata
    FCE0 2E40      MOV	R4,R16
    FCE1 2F04      MOV	R16,R20
    FCE2 5F0F      SUBI	R16,0xFF
    FCE3 4F1F      SBCI	R17,0xFF
    FCE4 924F      PUSH	R4
    FCE5 DFCE      RCALL	_de_encryptdata
    FCE6 904F      POP	R4
    FCE7 2E20      MOV	R2,R16
    FCE8 2433      CLR	R3
    FCE9 2C32      MOV	R3,R2
    FCEA 2422      CLR	R2
    FCEB 2D24      MOV	R18,R4
    FCEC 2733      CLR	R19
    FCED 0D22      ADD	R18,R2
    FCEE 1D33      ADC	R19,R3
    FCEF 018A      MOVW	R16,R20
    FCF0 DFA9      RCALL	_boot_page_fill
    FCF1 5F4E      SUBI	R20,0xFE
    FCF2 4F5F      SBCI	R21,0xFF
    FCF3 3040      CPI	R20,0
    FCF4 E0E1      LDI	R30,1
    FCF5 075E      CPC	R21,R30
    FCF6 F33C      BLT	0xFCDE
(0073) 	} 
(0074) 	boot_page_ew(address,0x05);
    FCF7 E085      LDI	R24,5
    FCF8 8388      STD	Y+0,R24
    FCF9 9120 0102 LDS	R18,address+2
    FCFB 9130 0103 LDS	R19,address+3
    FCFD 9100 0100 LDS	R16,address
    FCFF 9110 0101 LDS	R17,address+1
    FD01 DF8D      RCALL	_boot_page_ew
(0075) 	wait_page_rw_ok();
    FD02 DFA3      RCALL	_wait_page_rw_ok
    FD03 9621      ADIW	R28,1
    FD04 9159      LD	R21,Y+
    FD05 9149      LD	R20,Y+
    FD06 9508      RET
(0076) }
(0077) //从RS232发送1个字节
(0078) void uart_putchar(char c)
(0079) {
(0080) 	while(!(UCSR0A&0x20));
_uart_putchar:
  c                    --> R16
    FD07 9B5D      SBIS	0x0B,5
    FD08 CFFE      RJMP	_uart_putchar
(0081) 	UDR0=c;
    FD09 B90C      OUT	0x0C,R16
    FD0A 9508      RET
(0082) }
(0083) //从RS232接收1个字节
(0084) int uart_getchar(void)
(0085) {
(0086) 	unsigned char status,res;
(0087) 	if(!(UCSR0A&0x80)) return -1;
_uart_getchar:
  status               --> R18
  res                  --> R16
    FD0B 995F      SBIC	0x0B,7
    FD0C C003      RJMP	0xFD10
    FD0D EF0F      LDI	R16,0xFF
    FD0E EF1F      LDI	R17,0xFF
    FD0F C009      RJMP	0xFD19
(0088) 	status=UCSR0A;
    FD10 B12B      IN	R18,0x0B
(0089) 	res=UDR0;
    FD11 B10C      IN	R16,0x0C
(0090) 	res=res;
(0091) 	if(status&0x1c) return -1;
    FD12 2F82      MOV	R24,R18
    FD13 718C      ANDI	R24,0x1C
    FD14 F019      BEQ	0xFD18
    FD15 EF0F      LDI	R16,0xFF
    FD16 EF1F      LDI	R17,0xFF
    FD17 C001      RJMP	0xFD19
(0092) 	return res;
    FD18 2711      CLR	R17
    FD19 9508      RET
_uart_waitchar:
  c                    --> R10
    FD1A 92AA      ST	R10,-Y
    FD1B 92BA      ST	R11,-Y
(0093) }
(0094) //等待从RS232接收1个有效字节
(0095) char uart_waitchar(void)
(0096) {
(0097) 	int c;
(0098) 	while((c=uart_getchar())==-1);
    FD1C DFEE      RCALL	_uart_getchar
    FD1D 0158      MOVW	R10,R16
    FD1E 3F0F      CPI	R16,0xFF
    FD1F EFEF      LDI	R30,0xFF
    FD20 071E      CPC	R17,R30
    FD21 F3D1      BEQ	0xFD1C
(0099) 	return (char)c;
    FD22 90B9      LD	R11,Y+
    FD23 90A9      LD	R10,Y+
    FD24 9508      RET
_calcrc:
  i                    --> R20
  crc                  --> R10
  count                --> R18
  ptr                  --> R16
    FD25 940E FE38 CALL	push_xgset300C
(0100) }
(0101) //计算CRC
(0102) int calcrc(char *ptr,int count)
(0103) {
(0104) 	int crc=0;
    FD27 24AA      CLR	R10
    FD28 24BB      CLR	R11
    FD29 C01B      RJMP	0xFD45
(0105) 	char i;
(0106) 	while(--count>=0)
(0107) 	{
(0108) 		crc=crc^(int)*ptr++<<8;
    FD2A 01F8      MOVW	R30,R16
    FD2B 9021      LD	R2,Z+
    FD2C 018F      MOVW	R16,R30
    FD2D 2433      CLR	R3
    FD2E 2C32      MOV	R3,R2
    FD2F 2422      CLR	R2
    FD30 24A2      EOR	R10,R2
    FD31 24B3      EOR	R11,R3
(0109) 		i=8;
    FD32 E048      LDI	R20,0x8
(0110) 		do
(0111) 		{
(0112) 			if(crc&0x8000)
    FD33 FEB7      SBRS	R11,7
    FD34 C009      RJMP	0xFD3E
(0113) 				crc=crc<<1^0x1021;
    FD35 E281      LDI	R24,0x21
    FD36 E190      LDI	R25,0x10
    FD37 0115      MOVW	R2,R10
    FD38 0C22      LSL	R2
    FD39 1C33      ROL	R3
    FD3A 2628      EOR	R2,R24
    FD3B 2639      EOR	R3,R25
    FD3C 0151      MOVW	R10,R2
    FD3D C002      RJMP	0xFD40
(0114) 			else
(0115) 				crc=crc<<1;
    FD3E 0CAA      LSL	R10
    FD3F 1CBB      ROL	R11
(0116) 		}
(0117) 		while(--i);
    FD40 2F84      MOV	R24,R20
    FD41 5081      SUBI	R24,1
    FD42 2F48      MOV	R20,R24
    FD43 2344      TST	R20
    FD44 F771      BNE	0xFD33
    FD45 01C9      MOVW	R24,R18
    FD46 9701      SBIW	R24,1
    FD47 019C      MOVW	R18,R24
    FD48 3020      CPI	R18,0
    FD49 E0E0      LDI	R30,0
    FD4A 073E      CPC	R19,R30
    FD4B F6F4      BGE	0xFD2A
(0118) 	}
(0119) 	return (crc);
    FD4C 0185      MOVW	R16,R10
    FD4D 940C FE3D JMP	pop_xgset300C
(0120) }
(0121) //退出Bootloader程序，从0x0000处执行应用程序
(0122) void quit(void)
(0123) {
(0124) 	uart_putchar('O');uart_putchar('K');uart_putchar('?');
_quit: