sdcrc.s

mega128的串口发送文件.可以发送0X55上位机使用串口调试工具就可以接收了.

	.module sdcrc.c
	.area lit(rom, con, rel)
_CRCTable::
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	.dbfile D:\new_sd\SD\SD\sdcrc.c
	.dbsym e CRCTable _CRCTable A[512:256]ki
	.area text(rom, con, rel)
	.dbfile D:\new_sd\SD\SD\sdcrc.c
	.dbfunc e SD_GetCRC16 _SD_GetCRC16 fi
;              i -> R20,R21
;         result -> R22,R23
;            len -> R10,R11
;        pSource -> R12,R13
	.even
_SD_GetCRC16::
	xcall push_gset4
	movw R10,R18
	movw R12,R16
	.dbline -1
	.dbline 52
; /*******************************************************************************************************
; ** Descriptions:		sd 卡驱动软件包: SD卡相关工具函数 ---- CRC校验
; ********************************************************************************************************/
; #include    "D:\new_sd\define.h"
; 
; 
; 
; #if SD_CRC_EN
; //X16 + X12 + X5 + 1 余式表
; uint16 const CRCTable[256]={0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
; 							0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
; 							0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,
; 							0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,
; 							0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,
; 							0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,
; 							0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,
; 							0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,
; 							0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,
; 							0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,
; 							0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
; 							0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,
; 							0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,
; 							0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,
; 							0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,
; 							0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,
; 							0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,
; 							0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,
; 							0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,
; 							0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,
; 							0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,
; 							0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
; 							0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,
; 							0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,
; 							0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,
; 							0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,
; 							0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,
; 							0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,
; 							0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,
; 							0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,
; 							0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,
; 							0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0
; 						   };
; 
; /********************************************************************************************************************
; ** 函数名称: INT8U SD_GetCRC16()					Name:	  INT8U SD_GetCRC16()
; ** 功能描述: 计算CRC16								Function: calculate CRC16 
; ** 输　  入: INT8U *pSource: 数据					Input:    INT8U *pSource: data
; 			 INT16U len    : 长度							  INT16U len    : len
; ** 输 　 出: CRC16码								Output:	  CRC16 code
; ********************************************************************************************************************/
; uint16 SD_GetCRC16(uint8 *pSource, uint16 len)
; {
	.dbline 54
; 	uint16 i;
; 	uint16 result = 0;
	clr R22
	clr R23
	.dbline 56
; 
; 	for (i = 0; i < len; i++)
	clr R20
	clr R21
	xjmp L5
L2:
	.dbline 57
	movw R30,R12
	ld R2,Z+
	movw R12,R30
	clr R3
	movw R18,R22
	mov R18,R19
	clr R19
	eor R18,R2
	eor R19,R3
	ldi R16,2
	ldi R17,0
	xcall empy16s
	movw R30,R16
	ldi R24,<_CRCTable
	ldi R25,>_CRCTable
	add R30,R24
	adc R31,R25
	lpm R0,Z+
	lpm R1,Z
	movw R30,R0
	movw R2,R22
	mov R3,R2
	clr R2
	eor R2,R30
	eor R3,R31
	movw R22,R2
L3:
	.dbline 56
	subi R20,255  ; offset = 1
	sbci R21,255
L5:
	.dbline 56
	cp R20,R10
	cpc R21,R11
	brlo L2
	.dbline 59
; 	    result = (result << 8) ^ (uint16)CRCTable[(result >> 8) ^ *pSource++];
; 	
; 	return result;
	movw R16,R22
	.dbline -2
L1:
	xcall pop_gset4
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r result 22 i
	.dbsym r len 10 i
	.dbsym r pSource 12 pc
	.dbend
	.dbfunc e SD_GetCmdByte6 _SD_GetCmdByte6 fc
;          array -> y+0
;              i -> R20
;            reg -> R22
;              j -> R12
;          param -> R10,R11
;            cmd -> R20
	.even
_SD_GetCmdByte6::
	xcall push_gset5
	movw R10,R18
	mov R20,R16
	sbiw R28,5
	.dbline -1
	.dbline 70
; }
; 
; /*******************************************************************************************************************
; ** 函数名称: INT8U SD_GetCmdByte6()					Name:	  INT8U SD_GetCmdByte6()
; ** 功能描述: 获取SD卡命令的CRC7						Function: get the CRC7 of the command of SD card
; ** 输　  入: INT8U cmd   : 命令						Input:    INT8U cmd   :	command
; 			 INT8U *param: 命令的参数,长度为4字节			  INT8U *param: the param of command,length is 4 bytes
; ** 输 　 出: CRC7码									Output:	  CRC7 code
; ********************************************************************************************************************/
; uint8 SD_GetCmdByte6(uint8 cmd, uint8 *param)
; {
	.dbline 72
; 	uint8 i, j;
; 	uint8 reg = 0;
	clr R22
	.dbline 75
; 	uint8 array[5];
; 	
; 	array[0] = cmd;
	std y+0,R20
	.dbline 76
; 	for (i = 1; i < 5; i++)						/* 将参数的顺序重新排列 */
	ldi R20,1
	xjmp L10
L7:
	.dbline 77
	mov R2,R20
	clr R3
	ldi R30,4
	ldi R31,0
	sub R30,R2
	sbc R31,R3
	add R30,R10
	adc R31,R11
	ldd R2,z+0
	movw R24,R28
	mov R30,R20
	clr R31
	add R30,R24
	adc R31,R25
	std z+0,R2
L8:
	.dbline 76
	inc R20
L10:
	.dbline 76
	cpi R20,5
	brlo L7
	.dbline 79
; 		array[i] = param[4 - i];
; 	
; 	for (i = 0; i < 5; i++)						/* 计算5个字节的CRC7 */
	clr R20
	xjmp L14
L11:
	.dbline 80
; 	{
	.dbline 81
; 	    for (j = 0; j < 8; j++)
	clr R12
	xjmp L18
L15:
	.dbline 82
; 	    {
	.dbline 83
; 			reg <<= 1;
	lsl R22
	.dbline 84
; 			reg ^= ((((array[i] << j) ^ reg) & 0x80) ? 0x9 : 0);
	movw R24,R28
	mov R30,R20
	clr R31
	add R30,R24
	adc R31,R25
	ldd R16,z+0
	mov R17,R12
	xcall lsl8
	mov R24,R16
	eor R24,R22
	andi R24,128
	breq L19
	ldi R24,9
	ldi R25,0
	movw R14,R24
	xjmp L20
L19:
	clr R14
	clr R15
L20:
	mov R2,R22
	clr R3
	eor R2,R14
	eor R3,R15
	mov R22,R2
	.dbline 85
L16:
	.dbline 81
	inc R12
L18:
	.dbline 81
	mov R24,R12
	cpi R24,8
	brlo L15
	.dbline 86
L12:
	.dbline 79
	inc R20
L14:
	.dbline 79
	cpi R20,5
	brlo L11
	.dbline 88
; 	    }
; 	}
; 	
; 	return ((reg << 1) + 0x01) ;				/* 计算结果的CRC7左移一位,并将最低位置1 */
	mov R16,R22
	lsl R16
	subi R16,255    ; addi 1
	.dbline -2
L6:
	adiw R28,5
	xcall pop_gset5
	.dbline 0 ; func end
	ret
	.dbsym l array 0 A[5:5]c
	.dbsym r i 20 c
	.dbsym r reg 22 c
	.dbsym r j 12 c
	.dbsym r param 10 pc
	.dbsym r cmd 20 c
	.dbend