📄 sd.lss
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5b8: fe cf rjmp .-4 ; 0x5b6 <SD_Write_Sector+0xf4>
;
return (SPDR);
5ba: 8f b1 in r24, 0x0f ; 15
//忙时，读回来的值为0x00,不忙时，为0xff
SET_SD_CS; //关闭片选
SPI_RW(0XFF); //按照SD卡的操作时序在这里补8个时钟
return(0); //返回0,说明写扇区操作成功
}
5bc: 84 2f mov r24, r20
5be: 26 96 adiw r28, 0x06 ; 6
5c0: 0f b6 in r0, 0x3f ; 63
5c2: f8 94 cli
5c4: de bf out 0x3e, r29 ; 62
5c6: 0f be out 0x3f, r0 ; 63
5c8: cd bf out 0x3d, r28 ; 61
5ca: cf 91 pop r28
5cc: df 91 pop r29
5ce: 1f 91 pop r17
5d0: ff 90 pop r15
5d2: ef 90 pop r14
5d4: df 90 pop r13
5d6: cf 90 pop r12
5d8: 08 95 ret
000005da <SD_Read_Sector>:
- 返回说明：调用成功，返回0x00，否则返回READ_BLOCK_ERROR (sd.h中有定义)
- 注：SD卡初始化成功后，读写扇区时，尽量将SPI速度提上来，提高效率
********************************************************************************************/
uint8_t SD_Read_Sector(uint32_t addr , uint8_t *buffer)//从SD卡的指定扇区中读出512个字节，使用CMD17（17号命令）
{
5da: cf 92 push r12
5dc: df 92 push r13
5de: ef 92 push r14
5e0: ff 92 push r15
5e2: 1f 93 push r17
5e4: df 93 push r29
5e6: cf 93 push r28
5e8: 00 d0 rcall .+0 ; 0x5ea <SD_Read_Sector+0x10>
5ea: 00 d0 rcall .+0 ; 0x5ec <SD_Read_Sector+0x12>
5ec: 00 d0 rcall .+0 ; 0x5ee <SD_Read_Sector+0x14>
5ee: cd b7 in r28, 0x3d ; 61
5f0: de b7 in r29, 0x3e ; 62
5f2: 6a 01 movw r12, r20
uint16_t j;
uint8_t retry,temp;
uint8_t pcmd[]={0x51,0x00,0x00,0x00,0x00,0xFF}; //CMD17的字节序列
5f4: de 01 movw r26, r28
5f6: 11 96 adiw r26, 0x01 ; 1
5f8: ee eb ldi r30, 0xBE ; 190
5fa: f0 e0 ldi r31, 0x00 ; 0
5fc: 26 e0 ldi r18, 0x06 ; 6
5fe: 01 90 ld r0, Z+
600: 0d 92 st X+, r0
602: 21 50 subi r18, 0x01 ; 1
604: e1 f7 brne .-8 ; 0x5fe <SD_Read_Sector+0x24>
addr <<= 9; //sector = sector * 512 将块地址（扇区地址）转为字节地址
606: dc 01 movw r26, r24
608: cb 01 movw r24, r22
60a: 79 e0 ldi r23, 0x09 ; 9
60c: 88 0f add r24, r24
60e: 99 1f adc r25, r25
610: aa 1f adc r26, r26
612: bb 1f adc r27, r27
614: 7a 95 dec r23
616: d1 f7 brne .-12 ; 0x60c <SD_Read_Sector+0x32>
pcmd[1]=((addr & 0xFF000000) >> 24);
618: 2b 2f mov r18, r27
61a: 33 27 eor r19, r19
61c: 44 27 eor r20, r20
61e: 55 27 eor r21, r21
620: 2a 83 std Y+2, r18 ; 0x02
pcmd[2]=((addr & 0x00FF0000) >> 16);
622: ab 83 std Y+3, r26 ; 0x03
pcmd[3]=((addr & 0x0000FF00) >> 8);
624: 80 70 andi r24, 0x00 ; 0
626: a0 70 andi r26, 0x00 ; 0
628: b0 70 andi r27, 0x00 ; 0
62a: 89 2f mov r24, r25
62c: 9a 2f mov r25, r26
62e: ab 2f mov r26, r27
630: bb 27 eor r27, r27
632: 8c 83 std Y+4, r24 ; 0x04
634: 1f ef ldi r17, 0xFF ; 255
retry = 0;
do
{
temp = SD_Write_Cmd(pcmd); //写入CMD17
636: 7e 01 movw r14, r28
638: 08 94 sec
63a: e1 1c adc r14, r1
63c: f1 1c adc r15, r1
63e: c7 01 movw r24, r14
640: 0e 94 bb 01 call 0x376 ; 0x376 <SD_Write_Cmd>
644: 11 50 subi r17, 0x01 ; 1
retry++;
if(retry > 254)
646: 19 f4 brne .+6 ; 0x64e <SD_Read_Sector+0x74>
{
SET_SD_CS; //关闭片选
648: d8 9a sbi 0x1b, 0 ; 27
64a: 84 e0 ldi r24, 0x04 ; 4
64c: 2b c0 rjmp .+86 ; 0x6a4 <SD_Read_Sector+0xca>
return(READ_BLOCK_ERROR); //读块失败 READ_BLOCK_ERROR=0x04
USART_Send_Str("SD卡读扇区失败\r\n");
}
}while(temp!=0);
64e: 88 23 and r24, r24
650: b1 f7 brne .-20 ; 0x63e <SD_Read_Sector+0x64>
//将SS SCK MOSI置为输出
}
uint8_t SPI_RW(uint8_t dat)
{//SPI读写1Byte(欲想读之必先与之)
SPDR = dat;
652: 9f ef ldi r25, 0xFF ; 255
654: 9f b9 out 0x0f, r25 ; 15
while(!(SPSR & (1 << SPIF)))
656: 77 9b sbis 0x0e, 7 ; 14
658: fe cf rjmp .-4 ; 0x656 <SD_Read_Sector+0x7c>
;
return (SPDR);
65a: 8f b1 in r24, 0x0f ; 15
return(READ_BLOCK_ERROR); //读块失败 READ_BLOCK_ERROR=0x04
USART_Send_Str("SD卡读扇区失败\r\n");
}
}while(temp!=0);
while (SPI_RW(0XFF) != 0XFE); //一直读，当读到0xfe时，说明后面的是512字节的数据了
65c: 8e 3f cpi r24, 0xFE ; 254
65e: d1 f7 brne .-12 ; 0x654 <SD_Read_Sector+0x7a>
660: 20 e0 ldi r18, 0x00 ; 0
662: 30 e0 ldi r19, 0x00 ; 0
//将SS SCK MOSI置为输出
}
uint8_t SPI_RW(uint8_t dat)
{//SPI读写1Byte(欲想读之必先与之)
SPDR = dat;
664: 9f ef ldi r25, 0xFF ; 255
666: 9f b9 out 0x0f, r25 ; 15
while(!(SPSR & (1 << SPIF)))
668: 77 9b sbis 0x0e, 7 ; 14
66a: fe cf rjmp .-4 ; 0x668 <SD_Read_Sector+0x8e>
;
return (SPDR);
66c: 8f b1 in r24, 0x0f ; 15
while (SPI_RW(0XFF) != 0XFE); //一直读，当读到0xfe时，说明后面的是512字节的数据了
for(j=0;j<512;j++) //将数据写入到数据缓冲区中
{
buffer[j] = SPI_RW(0XFF);
66e: f6 01 movw r30, r12
670: e2 0f add r30, r18
672: f3 1f adc r31, r19
674: 80 83 st Z, r24
}
}while(temp!=0);
while (SPI_RW(0XFF) != 0XFE); //一直读，当读到0xfe时，说明后面的是512字节的数据了
for(j=0;j<512;j++) //将数据写入到数据缓冲区中
676: 2f 5f subi r18, 0xFF ; 255
678: 3f 4f sbci r19, 0xFF ; 255
67a: 82 e0 ldi r24, 0x02 ; 2
67c: 20 30 cpi r18, 0x00 ; 0
67e: 38 07 cpc r19, r24
680: 91 f7 brne .-28 ; 0x666 <SD_Read_Sector+0x8c>
//将SS SCK MOSI置为输出
}
uint8_t SPI_RW(uint8_t dat)
{//SPI读写1Byte(欲想读之必先与之)
SPDR = dat;
682: 8f ef ldi r24, 0xFF ; 255
684: 8f b9 out 0x0f, r24 ; 15
while(!(SPSR & (1 << SPIF)))
686: 77 9b sbis 0x0e, 7 ; 14
688: fe cf rjmp .-4 ; 0x686 <SD_Read_Sector+0xac>
;
return (SPDR);
68a: 8f b1 in r24, 0x0f ; 15
//将SS SCK MOSI置为输出
}
uint8_t SPI_RW(uint8_t dat)
{//SPI读写1Byte(欲想读之必先与之)
SPDR = dat;
68c: 8f ef ldi r24, 0xFF ; 255
68e: 8f b9 out 0x0f, r24 ; 15
while(!(SPSR & (1 << SPIF)))
690: 77 9b sbis 0x0e, 7 ; 14
692: fe cf rjmp .-4 ; 0x690 <SD_Read_Sector+0xb6>
;
return (SPDR);
694: 8f b1 in r24, 0x0f ; 15
}
SPI_RW(0XFF);
SPI_RW(0XFF); //读取两个字节的CRC校验码，不用关心它们
SET_SD_CS; //SD卡关闭片选
696: d8 9a sbi 0x1b, 0 ; 27
//将SS SCK MOSI置为输出
}
uint8_t SPI_RW(uint8_t dat)
{//SPI读写1Byte(欲想读之必先与之)
SPDR = dat;
698: 8f ef ldi r24, 0xFF ; 255
69a: 8f b9 out 0x0f, r24 ; 15
while(!(SPSR & (1 << SPIF)))
69c: 77 9b sbis 0x0e, 7 ; 14
69e: fe cf rjmp .-4 ; 0x69c <SD_Read_Sector+0xc2>
;
return (SPDR);
6a0: 8f b1 in r24, 0x0f ; 15
6a2: 80 e0 ldi r24, 0x00 ; 0
SET_SD_CS; //SD卡关闭片选
SPI_RW(0xFF); //按照SD卡的操作时序在这里补8个时钟
//USART_Send_Str("SD卡读扇区成功\r\n");
return 0;
}
6a4: 26 96 adiw r28, 0x06 ; 6
6a6: 0f b6 in r0, 0x3f ; 63
6a8: f8 94 cli
6aa: de bf out 0x3e, r29 ; 62
6ac: 0f be out 0x3f, r0 ; 63
6ae: cd bf out 0x3d, r28 ; 61
6b0: cf 91 pop r28
6b2: df 91 pop r29
6b4: 1f 91 pop r17
6b6: ff 90 pop r15
6b8: ef 90 pop r14
6ba: df 90 pop r13
6bc: cf 90 pop r12
6be: 08 95 ret
000006c0 <get_fileinfo>:
static
void get_fileinfo ( /* No return code */
FILINFO *finfo, /* Ptr to store the File Information */
const BYTE *dir /* Ptr to the directory entry */
)
{
6c0: 0f 93 push r16
6c2: 1f 93 push r17
6c4: cf 93 push r28
6c6: df 93 push r29
6c8: 8c 01 movw r16, r24
6ca: eb 01 movw r28, r22
BYTE n, c, a;
char *p;
p = &finfo->fname[0];
6cc: ac 01 movw r20, r24
6ce: 47 5f subi r20, 0xF7 ; 247
6d0: 5f 4f sbci r21, 0xFF ; 255
a = _USE_NTFLAG ? dir[DIR_NTres] : 0; /* NT flag */
6d2: 6c 85 ldd r22, Y+12 ; 0x0c
6d4: 80 e0 ldi r24, 0x00 ; 0
6d6: 90 e0 ldi r25, 0x00 ; 0
for (n = 0; n < 8; n++) { /* Convert file name (body) */
c = dir[n];
if (c == ' ') break;
if (c == 0x05) c = 0xE5;
if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
6d8: 26 2f mov r18, r22
6da: 30 e0 ldi r19, 0x00 ; 0
6dc: 28 70 andi r18, 0x08 ; 8
6de: 30 70 andi r19, 0x00 ; 0
p = &finfo->fname[0];
a = _USE_NTFLAG ? dir[DIR_NTres] : 0; /* NT flag */
for (n = 0; n < 8; n++) { /* Convert file name (body) */
c = dir[n];
6e0: fe 01 movw r30, r28
6e2: e8 0f add r30, r24
6e4: f9 1f adc r31, r25
6e6: e0 81 ld r30, Z
if (c == ' ') break;
6e8: e0 32 cpi r30, 0x20 ; 32
6ea: 91 f0 breq .+36 ; 0x710 <get_fileinfo+0x50>
if (c == 0x05) c = 0xE5;
6ec: e5 30 cpi r30, 0x05 ; 5
6ee: 09 f4 brne .+2 ; 0x6f2 <get_fileinfo+0x32>
6f0: e5 ee ldi r30, 0xE5 ; 229
if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
6f2: 21 15 cp r18, r1
6f4: 31 05 cpc r19, r1
6f6: 29 f0 breq .+10 ; 0x702 <get_fileinfo+0x42>
6f8: e1 34 cpi r30, 0x41 ; 65
6fa: 18 f0 brcs .+6 ; 0x702 <get_fileinfo+0x42>
6fc: eb 35 cpi r30, 0x5B ; 91
6fe: 08 f4 brcc .+2 ; 0x702 <get_fileinfo+0x42>
700: e0 5e subi r30, 0xE0 ; 224
*p++ = c;
702: da 01 movw r26, r20
704: ed 93 st X+, r30
706: ad 01 movw r20, r26
708: 01 96 adiw r24, 0x01 ; 1
char *p;
p = &finfo->fname[0];
a = _USE_NTFLAG ? dir[DIR_NTres] : 0; /* NT flag */
for (n = 0; n < 8; n++) { /* Convert file name (body) */
70a: 88 30 cpi r24, 0x08 ; 8
70c: 91 05 cpc r25, r1
70e: 41 f7 brne .-48 ; 0x6e0 <get_fileinfo+0x20>
if (c == ' ') break;
if (c == 0x05) c = 0xE5;
if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
*p++ = c;
}
if (dir[8] != ' ') { /* Convert file name (extension) */
710: 88 85 ldd r24, Y+8 ; 0x08
712: 80 32 cpi r24, 0x20 ; 32
714: 11 f4 brne .+4 ; 0x71a <get_fileinfo+0x5a>
716: fa 01 movw r30, r20
718: 1c c0 rjmp .+56 ; 0x752 <get_fileinfo+0x92>
*p++ = '.';
71a: fa 01 movw r30, r20
71c: 8e e2 ldi r24, 0x2E ; 46
71e: 81 93 st Z+, r24
720: de 01 movw r26, r28
for (n = 8; n < 11; n++) {
c = dir[n];
if (c == ' ') break;
if (a & 0x10 && c >= 'A' && c <= 'Z') c += 0x20;
722: 26 2f mov r18, r22
724: 30 e0 ldi r19, 0x00 ; 0
726: 20 71 andi r18, 0x10 ; 16
728: 30 70 andi r19, 0x00 ; 0
if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
*p++ = c;
}
if (dir[8] != ' ') { /* Convert file name (extension) */
*p++ = '.';
for (n = 8; n < 11; n++) {
72a: 4c 5f subi r20, 0xFC ; 252
72c: 5f 4f sbci r21, 0xFF ; 255
c = dir[n];
72e: 18 96 adiw r26, 0x08 ; 8
730: 8c 91 ld r24, X
732: 18 97 sbiw r26, 0x08 ; 8
if (c == ' ') break;
734: 80 32 cpi r24, 0x20 ; 32
736: 69 f0 breq .+26 ; 0x752 <get_fileinfo+0x92>
if (a & 0x10 && c >= 'A' && c <= 'Z') c += 0x20;
738: 21 15 cp r18, r1
73a: 31 05 cpc r19, r1
73c: 29 f0 breq .+10 ; 0x748 <get_fileinfo+0x88>
73e: 81 34 cpi r24, 0x41 ; 65
740: 18 f0 brcs .+6 ; 0x748 <get_fileinfo+0x88>
742: 8b 35 cpi r24, 0x5B ; 91
744: 08 f4 brcc .+2 ; 0x748 <get_fileinfo+0x88>
746: 80 5e subi r24, 0xE0 ; 224
*p++ = c;
748: 81 93 st Z+, r24
74a: 11 96 adiw r26, 0x01 ; 1
if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
*p++ = c;
}
if (dir[8] != ' ') { /* Convert file nam⌨️ 快捷键说明
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