236 lines
6.2 KiB
Plaintext
236 lines
6.2 KiB
Plaintext
#include "SPI_SD_driver.h"
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#include "diskio.h"
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//#include "flash.h"
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#include "spi.h"
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//#include "malloc.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK战舰STM32开发板
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//FATFS disio.c 驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//修改日期:2012/9/18
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//版本：V1.0
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2009-2019
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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#define SD_CARD 0 //SD卡,卷标为0
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#define EX_FLASH 1 //外部flash,卷标为1
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#define FLASH_SECTOR_SIZE 512
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//对于W25Q64
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//前6M字节给fatfs用,6M字节后~6M+500K给用户用,6M+500K以后,用于存放字库,字库占用1.5M.
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u16 FLASH_SECTOR_COUNT=2048*6;//6M字节,默认为W25Q64
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#define FLASH_BLOCK_SIZE 8 //每个BLOCK有8个扇区
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//初始化磁盘
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DSTATUS disk_initialize (
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BYTE drv /* Physical drive nmuber (0..) */
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)
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{
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u8 res=0;
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switch(drv)
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{
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case SD_CARD://SD卡
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res = SD_Initialize();//SD_Initialize()
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if(res)//STM32 SPI的bug,在sd卡操作失败的时候如果不执行下面的语句,可能导致SPI读写异常
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{
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SD_SPI_SpeedLow();
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SD_SPI_ReadWriteByte(0xff);//提供额外的8个时钟
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SD_SPI_SpeedHigh();
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}
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break;
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case EX_FLASH://外部flash
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//SPI_Flash_Init();
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// if(SPI_FLASH_TYPE==W25Q64)FLASH_SECTOR_COUNT=2048*6;//W25Q64
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// else FLASH_SECTOR_COUNT=2048*2; //其他
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break;
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default:
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res=1;
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}
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if(res)return STA_NOINIT;
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else return 0; //初始化成功
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}
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//获得磁盘状态
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DSTATUS disk_status (
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BYTE drv /* Physical drive nmuber (0..) */
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)
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{
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return 0;
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}
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//读扇区
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//drv:磁盘编号0~9
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//*buff:数据接收缓冲首地址
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//sector:扇区地址
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//count:需要读取的扇区数
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DRESULT disk_read (
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BYTE drv, /* Physical drive nmuber (0..) */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector address (LBA) */
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BYTE count /* Number of sectors to read (1..255) */
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)
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{
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u8 res=0;
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if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误
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switch(drv)
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{
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case SD_CARD://SD卡
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res=SD_ReadDisk(buff,sector,count);
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if(res)//STM32 SPI的bug,在sd卡操作失败的时候如果不执行下面的语句,可能导致SPI读写异常
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{
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SD_SPI_SpeedLow();
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SD_SPI_ReadWriteByte(0xff);//提供额外的8个时钟
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SD_SPI_SpeedHigh();
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}
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break;
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case EX_FLASH://外部flash
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for(;count>0;count--)
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{
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//SPI_Flash_Read(buff,sector*FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
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sector++;
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buff+=FLASH_SECTOR_SIZE;
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}
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res=0;
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break;
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default:
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res=1;
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}
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//处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值
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if(res==0x00)return RES_OK;
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else return RES_ERROR;
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}
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//写扇区
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//drv:磁盘编号0~9
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//*buff:发送数据首地址
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//sector:扇区地址
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//count:需要写入的扇区数
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#if _READONLY == 0
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DRESULT disk_write (
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BYTE drv, /* Physical drive nmuber (0..) */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector address (LBA) */
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BYTE count /* Number of sectors to write (1..255) */
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)
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{
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u8 res=0;
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if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误
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switch(drv)
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{
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case SD_CARD://SD卡
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res=SD_WriteDisk((u8*)buff,sector,count);
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break;
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case EX_FLASH://外部flash
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for(;count>0;count--)
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{
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//SPI_Flash_Write((u8*)buff,sector*FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
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sector++;
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buff+=FLASH_SECTOR_SIZE;
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}
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res=0;
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break;
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default:
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res=1;
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}
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//处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值
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if(res == 0x00)return RES_OK;
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else return RES_ERROR;
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}
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#endif /* _READONLY */
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//其他表参数的获得
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//drv:磁盘编号0~9
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//ctrl:控制代码
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//*buff:发送/接收缓冲区指针
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DRESULT disk_ioctl (
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BYTE drv, /* Physical drive nmuber (0..) */
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BYTE ctrl, /* Control code */
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void *buff /* Buffer to send/receive control data */
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)
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{
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DRESULT res;
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if(drv==SD_CARD)//SD卡
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{
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switch(ctrl)
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{
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case CTRL_SYNC:
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SD_CS_ENABLE();
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if(SD_WaitReady()==0)res = RES_OK;
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else res = RES_ERROR;
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SD_CS_DISABLE();
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break;
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case GET_SECTOR_SIZE:
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*(WORD*)buff = 512;
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res = RES_OK;
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break;
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case GET_BLOCK_SIZE:
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*(WORD*)buff = 8;
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res = RES_OK;
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break;
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case GET_SECTOR_COUNT:
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*(DWORD*)buff = SD_GetSectorCount();
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res = RES_OK;
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break;
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default:
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res = RES_PARERR;
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break;
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}
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}else if(drv==EX_FLASH) //外部FLASH
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{
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switch(ctrl)
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{
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case CTRL_SYNC:
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res = RES_OK;
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break;
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case GET_SECTOR_SIZE:
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*(WORD*)buff = FLASH_SECTOR_SIZE;
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res = RES_OK;
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break;
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case GET_BLOCK_SIZE:
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*(WORD*)buff = FLASH_BLOCK_SIZE;
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res = RES_OK;
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break;
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case GET_SECTOR_COUNT:
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*(DWORD*)buff = FLASH_SECTOR_COUNT;
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res = RES_OK;
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break;
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default:
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res = RES_PARERR;
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break;
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}
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}else res=RES_ERROR;//其他的不支持
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return res;
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}
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//获得时间
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//User defined function to give a current time to fatfs module */
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//31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
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//15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
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DWORD get_fattime (void)
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{
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RTC_TimeTypeDef time;
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RTC_DateTypeDef date;
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RTC_GetTime(RTC_Format_BIN,&time);
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RTC_GetDate(RTC_Format_BIN,&date);
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return ((date.RTC_Year+2000-1980)<<25|
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date.RTC_Month<<21|
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date.RTC_Date<<16|
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time.RTC_Hours<<11|
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time.RTC_Minutes<<5|
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time.RTC_Seconds>>1
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);
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}
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//动态分配内存
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//void *ff_memalloc (UINT size)
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//{
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// return (void*)mymalloc(SRAMIN,size);
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//}
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////释放内存
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//void ff_memfree (void* mf)
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//{
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// myfree(SRAMIN,mf);
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//}
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