Outline ![]()
Files ![]()
loading...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/**
******************************************************************************
* @file sdram_diskio.c
* @author MCD Application Team
* @brief SDRAM Disk I/O driver.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "ff_gen_drv.h"
#include "sdram_diskio.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Block Size in Bytes */
#define BLOCK_SIZE 512
/* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;
/* Private function prototypes -----------------------------------------------*/
DSTATUS SDRAMDISK_initialize (BYTE);
DSTATUS SDRAMDISK_status (BYTE);
DRESULT SDRAMDISK_read (BYTE, BYTE*, DWORD, UINT);
#if _USE_WRITE == 1
DRESULT SDRAMDISK_write (BYTE, const BYTE*, DWORD, UINT);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
DRESULT SDRAMDISK_ioctl (BYTE, BYTE, void*);
#endif /* _USE_IOCTL == 1 */
const Diskio_drvTypeDef SDRAMDISK_Driver =
{
SDRAMDISK_initialize,
SDRAMDISK_status,
SDRAMDISK_read,
#if _USE_WRITE
SDRAMDISK_write,
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
SDRAMDISK_ioctl,
#endif /* _USE_IOCTL == 1 */
};
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes a Drive
* @param lun : not used
* @retval DSTATUS: Operation status
*/
DSTATUS SDRAMDISK_initialize(BYTE lun)
{
Stat = STA_NOINIT;
/* Configure the SDRAM device */
if(BSP_SDRAM_Init() == SDRAM_OK)
{
Stat &= ~STA_NOINIT;
}
return Stat;
}
/**
* @brief Gets Disk Status
* @param lun : not used
* @retval DSTATUS: Operation status
*/
DSTATUS SDRAMDISK_status(BYTE lun)
{
return Stat;
}
/**
* @brief Reads Sector(s)
* @param lun : not used
* @param *buff: Data buffer to store read data
* @param sector: Sector address (LBA)
* @param count: Number of sectors to read (1..128)
* @retval DRESULT: Operation result
*/
DRESULT SDRAMDISK_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
uint32_t *pSrcBuffer = (uint32_t *)buff;
uint32_t BufferSize = (BLOCK_SIZE * count)/4;
uint32_t *pSdramAddress = (uint32_t *) (SDRAM_DEVICE_ADDR + (sector * BLOCK_SIZE));
for(; BufferSize != 0; BufferSize--)
{
*pSrcBuffer++ = *(__IO uint32_t *)pSdramAddress++;
}
return RES_OK;
}
/**
* @brief Writes Sector(s)
* @param lun : not used
* @param *buff: Data to be written
* @param sector: Sector address (LBA)
* @param count: Number of sectors to write (1..128)
* @retval DRESULT: Operation result
*/
#if _USE_WRITE == 1
DRESULT SDRAMDISK_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
{
uint32_t *pDstBuffer = (uint32_t *)buff;
uint32_t BufferSize = (BLOCK_SIZE * count)/4;
uint32_t *pSramAddress = (uint32_t *) (SDRAM_DEVICE_ADDR + (sector * BLOCK_SIZE));
for(; BufferSize != 0; BufferSize--)
{
*(__IO uint32_t *)pSramAddress++ = *pDstBuffer++;
}
return RES_OK;
}
#endif /* _USE_WRITE == 1 */
/**
* @brief I/O control operation
* @param lun : not used
* @param cmd: Control code
* @param *buff: Buffer to send/receive control data
* @retval DRESULT: Operation result
*/
#if _USE_IOCTL == 1
DRESULT SDRAMDISK_ioctl(BYTE lun, BYTE cmd, void *buff)
{
DRESULT res = RES_ERROR;
if (Stat & STA_NOINIT) return RES_NOTRDY;
switch (cmd)
{
/* Make sure that no pending write process */
case CTRL_SYNC :
res = RES_OK;
break;
/* Get number of sectors on the disk (DWORD) */
case GET_SECTOR_COUNT :
*(DWORD*)buff = SDRAM_DEVICE_SIZE / BLOCK_SIZE;
res = RES_OK;
break;
/* Get R/W sector size (WORD) */
case GET_SECTOR_SIZE :
*(WORD*)buff = BLOCK_SIZE;
res = RES_OK;
break;
/* Get erase block size in unit of sector (DWORD) */
case GET_BLOCK_SIZE :
*(DWORD*)buff = 1;
res = RES_OK;
break;
default:
res = RES_PARERR;
}
return res;
}
#endif /* _USE_IOCTL == 1 */