?? diskio.lst
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C51 COMPILER V7.06 DISKIO 03/06/2010 17:37:26 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE DISKIO
OBJECT MODULE PLACED IN diskio.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\c51.exe diskio.c DB OE BR LARGE
stmt level source
1 /*-----------------------------------------------------------------------*/
2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
3 /*-----------------------------------------------------------------------*/
4 /* This is a stub disk I/O module that acts as front end of the existing */
5 /* disk I/O modules and attach it to FatFs module with common interface. */
6 /*-----------------------------------------------------------------------*/
7
8 /* Modified by xzp21st 2009.5 */
9
10 #include "spi.h"
11 #include "sd.h"
12 #include "diskio.h"
13
14 static DSTATUS Stat = STA_NOINIT; /* Disk status */
15
16 /*-----------------------------------------------------------------------*/
17 /* Inidialize a Drive */
18
19 DSTATUS disk_initialize (
20 BYTE drv /* Physical drive nmuber (0) */
21 )
22 {
23 1 if (drv) return STA_NOINIT; /* Supports only single drive */
24 1
25 1 if (!SD_init()) /* Initialization succeded */
26 1 {
27 2 Stat &= ~STA_NOINIT; /* Clear STA_NOINIT */
28 2 }
29 1
30 1 return Stat;
31 1 }
32
33 /*-----------------------------------------------------------------------*/
34 /* Return Disk Status */
35
36 DSTATUS disk_status (
37 BYTE drv /* Physical drive nmuber (0) */
38 )
39 {
40 1 if (drv) return STA_NOINIT; /* Supports only single drive */
41 1 return Stat;
42 1 }
43
44 /*-----------------------------------------------------------------------*/
45 /* Read Sector(s) */
46
47 DRESULT disk_read (
48 BYTE drv, /* Physical drive nmuber:(0) */
49 BYTE *buff, /* Data buffer to store read data */
50 DWORD sector, /* Sector address (LBA) */
51 BYTE count /* Number of sectors to read (1..255) */
52 )
53 {
54 1 if (drv || !count) return RES_PARERR;
55 1 if (Stat & STA_NOINIT) return RES_NOTRDY;
C51 COMPILER V7.06 DISKIO 03/06/2010 17:37:26 PAGE 2
56 1
57 1 if (count == 1)/* Single block read */
58 1 {
59 2 if(!SD_readSingleBlock(buff, sector)) count = 0;
60 2
61 2 }
62 1 else/* Multiple block read */
63 1 {
64 2 if(!SD_readMultipleBlock (buff, sector, count)) count = 0;
65 2 }
66 1
67 1 return count ? RES_ERROR : RES_OK;
68 1 }
69
70 /*-----------------------------------------------------------------------*/
71 /* Write Sector(s) */
72
73 #if _READONLY == 0
74 DRESULT disk_write (
75 BYTE drv, /* Physical drive nmuber (0..) */
76 const BYTE *buff, /* Data to be written */
77 DWORD sector, /* Sector address (LBA) */
78 UINT count /* Number of sectors to write */
79 )
80 {
81 1 if (drv || !count) return RES_PARERR;
82 1 if (Stat & STA_NOINIT) return RES_NOTRDY;
83 1
84 1 if (count == 1)/* Single block write */
85 1 {
86 2 if(!SD_writeSingleBlock(buff, sector)) count = 0;
87 2
88 2 }
89 1 else/* Multiple block write */
90 1 {
91 2 if(!SD_writeMultipleBlock (buff, sector, count)) count = 0;
92 2 }
93 1
94 1 return count ? RES_ERROR : RES_OK;
95 1 }
96 #endif /* _READONLY */
97
98 /*-----------------------------------------------------------------------*/
99 /* Miscellaneous Functions */
100
101 DRESULT disk_ioctl (
102 BYTE drv, /* Physical drive nmuber (0..) */
103 BYTE ctrl, /* Control code */
104 void *buff /* Buffer to send/receive control data */
105 )
106 {
107 1 DRESULT res;
108 1 BYTE n, csd[16];
109 1 DWORD csize;
110 1
111 1 if (drv) return RES_PARERR;
112 1 if (Stat & STA_NOINIT) return RES_NOTRDY;
113 1
114 1 res = RES_ERROR;
115 1
116 1 switch (ctrl) {
117 2 case CTRL_SYNC : /* Flush dirty buffer if present */
C51 COMPILER V7.06 DISKIO 03/06/2010 17:37:26 PAGE 3
118 2 return RES_OK;
119 2 break;
120 2
121 2 case GET_SECTOR_COUNT : /* Get number of sectors on the disk (WORD) */
122 2 if((SD_sendCommand(CMD9, 0) == 0) && receive_DataBlock(csd, 16))
123 2 {
124 3 if((csd[0] >> 6) == 1) /* SDC ver 2.00 */
125 3 {
126 4 csize = csd[9] + ((WORD)csd[8] << 8) + 1;
127 4 *(DWORD*)buff = (DWORD)csize << 10;
128 4 }
129 3 else /* MMC or SDC ver 1.XX */
130 3 {
131 4 n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
132 4 csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
133 4 *(DWORD*)buff = (DWORD)csize << (n - 9);
134 4 }
135 3 res = RES_OK;
136 3 }
137 2 break;
138 2
139 2 case GET_SECTOR_SIZE : /* Get sectors on the disk (WORD) */
140 2 *(WORD*)buff = 512;
141 2 res = RES_OK;
142 2 break;
143 2
144 2 case GET_BLOCK_SIZE : /* Get erase block size in unit of sectors (DWORD) */
145 2 if ((SD_sendCommand(CMD9, 0) == 0) && receive_DataBlock(csd, 16)) /* Read CSD */
146 2 {
147 3 *(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
148 3 res = RES_OK;
149 3 }
150 2 break;
151 2
152 2 default:
153 2 res = RES_PARERR;
154 2 }
155 1
156 1 return res;
157 1 }
158
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 762 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 1 43
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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