Jackson Lv / SDCard

e

Dependents:   MusicShield

SDCard.c@0:3fe14de7b0cf, 2015-07-13 (annotated)

Committer:
Jackson_lv
Date:
Mon Jul 13 09:21:41 2015 +0000
Revision:
0:3fe14de7b0cf
sd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jackson_lv 0:3fe14de7b0cf 1 #include "mbed.h"
Jackson_lv 0:3fe14de7b0cf 2 #include "mmc_sd.h"
Jackson_lv 0:3fe14de7b0cf 3 #include "spi.h"
Jackson_lv 0:3fe14de7b0cf 4 #include "Serial.h"
Jackson_lv 0:3fe14de7b0cf 5
Jackson_lv 0:3fe14de7b0cf 6
Jackson_lv 0:3fe14de7b0cf 7 uint8_t SD_Type=0;//SD Type
Jackson_lv 0:3fe14de7b0cf 8
Jackson_lv 0:3fe14de7b0cf 9 //
Jackson_lv 0:3fe14de7b0cf 10 //data:the data to write
Jackson_lv 0:3fe14de7b0cf 11 //return:the data read back
Jackson_lv 0:3fe14de7b0cf 12 uint8_t SD_SPI_ReadWriteByte(uint8_t data)
Jackson_lv 0:3fe14de7b0cf 13 {
Jackson_lv 0:3fe14de7b0cf 14 return SPI_ReadWriteByte(data);
Jackson_lv 0:3fe14de7b0cf 15 }
Jackson_lv 0:3fe14de7b0cf 16
Jackson_lv 0:3fe14de7b0cf 17 //SD Card should init in low speed
Jackson_lv 0:3fe14de7b0cf 18 void SD_SPI_SpeedLow(void)
Jackson_lv 0:3fe14de7b0cf 19 {
Jackson_lv 0:3fe14de7b0cf 20 SPI_SetSpeed(SPI_SPEED_256);//set in low speed
Jackson_lv 0:3fe14de7b0cf 21 }
Jackson_lv 0:3fe14de7b0cf 22 //SD Card work normally
Jackson_lv 0:3fe14de7b0cf 23 void SD_SPI_SpeedHigh(void)
Jackson_lv 0:3fe14de7b0cf 24 {
Jackson_lv 0:3fe14de7b0cf 25 SPI_SetSpeed(SPI_SPEED_2);//set in high speed
Jackson_lv 0:3fe14de7b0cf 26 }
Jackson_lv 0:3fe14de7b0cf 27 //SPI hardware Init
Jackson_lv 0:3fe14de7b0cf 28 void SD_SPI_Init(void)
Jackson_lv 0:3fe14de7b0cf 29 {
Jackson_lv 0:3fe14de7b0cf 30 SPI1_Init();
Jackson_lv 0:3fe14de7b0cf 31 DigitalOut(SD_CS,1);
Jackson_lv 0:3fe14de7b0cf 32 }
Jackson_lv 0:3fe14de7b0cf 33
Jackson_lv 0:3fe14de7b0cf 34 ///////////////////////////////////////////////////////////////////////////////////
Jackson_lv 0:3fe14de7b0cf 35 //disable select ,release SPI BUS
Jackson_lv 0:3fe14de7b0cf 36 void SD_DisSelect(void)
Jackson_lv 0:3fe14de7b0cf 37 {
Jackson_lv 0:3fe14de7b0cf 38 SD_CS=1;
Jackson_lv 0:3fe14de7b0cf 39 SD_SPI_ReadWriteByte(0xff);//provide extra 8 clock
Jackson_lv 0:3fe14de7b0cf 40 }
Jackson_lv 0:3fe14de7b0cf 41 //select sd card,waiting card ready
Jackson_lv 0:3fe14de7b0cf 42 u8 SD_Select(void)
Jackson_lv 0:3fe14de7b0cf 43 {
Jackson_lv 0:3fe14de7b0cf 44 SD_CS=0;
Jackson_lv 0:3fe14de7b0cf 45 if(SD_WaitReady()==0)return 0;//waiting success
Jackson_lv 0:3fe14de7b0cf 46 SD_DisSelect();
Jackson_lv 0:3fe14de7b0cf 47 return 1;/waiting failed
Jackson_lv 0:3fe14de7b0cf 48 }
Jackson_lv 0:3fe14de7b0cf 49 //waiting card ready
Jackson_lv 0:3fe14de7b0cf 50 //return:0,ready;other,error code
Jackson_lv 0:3fe14de7b0cf 51 u8 SD_WaitReady(void)
Jackson_lv 0:3fe14de7b0cf 52 {
Jackson_lv 0:3fe14de7b0cf 53 uint32_t t=0;
Jackson_lv 0:3fe14de7b0cf 54 do
Jackson_lv 0:3fe14de7b0cf 55 {
Jackson_lv 0:3fe14de7b0cf 56 if(SD_SPI_ReadWriteByte(0XFF)==0XFF)return 0;//OK
Jackson_lv 0:3fe14de7b0cf 57 t++;
Jackson_lv 0:3fe14de7b0cf 58 }while(t<0XFFFFFF);//wait
Jackson_lv 0:3fe14de7b0cf 59 return 1;
Jackson_lv 0:3fe14de7b0cf 60 }
Jackson_lv 0:3fe14de7b0cf 61 //get SD card total sectors num
Jackson_lv 0:3fe14de7b0cf 62 //Response:0:get capacity error
Jackson_lv 0:3fe14de7b0cf 63 //other:SD card capacity(sectors num/512 bytes)
Jackson_lv 0:3fe14de7b0cf 64 //the num of byte of every sector must be 512,if ain't,the init can't pass
Jackson_lv 0:3fe14de7b0cf 65 uint8_t SD_GetResponse(uint8_t Response)
Jackson_lv 0:3fe14de7b0cf 66 {
Jackson_lv 0:3fe14de7b0cf 67 u16 Count=0xFFFF;//waiting num count
Jackson_lv 0:3fe14de7b0cf 68 while ((SD_SPI_ReadWriteByte(0XFF)!=Response)&&Count)Count--;//waiting for accurate respond
Jackson_lv 0:3fe14de7b0cf 69 if (Count==0)return MSD_RESPONSE_FAILURE;//response failure
Jackson_lv 0:3fe14de7b0cf 70 else return MSD_RESPONSE_NO_ERROR;//respond no error
Jackson_lv 0:3fe14de7b0cf 71 }
Jackson_lv 0:3fe14de7b0cf 72 //read a data package from SD card
Jackson_lv 0:3fe14de7b0cf 73 //buf:block buffer cache
Jackson_lv 0:3fe14de7b0cf 74 //len:length of data
Jackson_lv 0:3fe14de7b0cf 75 //return:0 success;other failed
Jackson_lv 0:3fe14de7b0cf 76 uint8_t SD_RecvData(uint8_t*buf,uint16_t len)
Jackson_lv 0:3fe14de7b0cf 77 {
Jackson_lv 0:3fe14de7b0cf 78 if(SD_GetResponse(0xFE))return 1;//waiting SD card return start sign 0xfe
Jackson_lv 0:3fe14de7b0cf 79 while(len--)//start recieve data
Jackson_lv 0:3fe14de7b0cf 80 {
Jackson_lv 0:3fe14de7b0cf 81 *buf=SPI_ReadWriteByte(0xFF);
Jackson_lv 0:3fe14de7b0cf 82 buf++;
Jackson_lv 0:3fe14de7b0cf 83 }
Jackson_lv 0:3fe14de7b0cf 84 //two dummy CRC
Jackson_lv 0:3fe14de7b0cf 85 SD_SPI_ReadWriteByte(0xFF);
Jackson_lv 0:3fe14de7b0cf 86 SD_SPI_ReadWriteByte(0xFF);
Jackson_lv 0:3fe14de7b0cf 87 return 0;//readding success
Jackson_lv 0:3fe14de7b0cf 88 }
Jackson_lv 0:3fe14de7b0cf 89 //write a data package to SD card 512 byte
Jackson_lv 0:3fe14de7b0cf 90 //buf:block buffer cache
Jackson_lv 0:3fe14de7b0cf 91 //cmd:order
Jackson_lv 0:3fe14de7b0cf 92 //retrun:0,success;1,failed
Jackson_lv 0:3fe14de7b0cf 93 uint8_t SD_SendBlock(uint8_t*buf,uint8_t cmd)
Jackson_lv 0:3fe14de7b0cf 94 {
Jackson_lv 0:3fe14de7b0cf 95 u16 t;
Jackson_lv 0:3fe14de7b0cf 96 if(SD_WaitReady())return 1;//waiting ready failed
Jackson_lv 0:3fe14de7b0cf 97 SD_SPI_ReadWriteByte(cmd);
Jackson_lv 0:3fe14de7b0cf 98 if(cmd!=0XFD)//not endding order
Jackson_lv 0:3fe14de7b0cf 99 {
Jackson_lv 0:3fe14de7b0cf 100 for(t=0;t<512;t++)SPI2_ReadWriteByte(buf[t]);//add speed
Jackson_lv 0:3fe14de7b0cf 101 SD_SPI_ReadWriteByte(0xFF);//ignore crc
Jackson_lv 0:3fe14de7b0cf 102 SD_SPI_ReadWriteByte(0xFF);
Jackson_lv 0:3fe14de7b0cf 103 t=SD_SPI_ReadWriteByte(0xFF);//receive respond
Jackson_lv 0:3fe14de7b0cf 104 if((t&0x1F)!=0x05)return 2;//respond failure
Jackson_lv 0:3fe14de7b0cf 105 }
Jackson_lv 0:3fe14de7b0cf 106 return 0;//writing success
Jackson_lv 0:3fe14de7b0cf 107 }
Jackson_lv 0:3fe14de7b0cf 108
Jackson_lv 0:3fe14de7b0cf 109 //write a order to sd card
Jackson_lv 0:3fe14de7b0cf 110 //input: u8 cmd order
Jackson_lv 0:3fe14de7b0cf 111 // u32 arg order param
Jackson_lv 0:3fe14de7b0cf 112 // u8 crc crc check Value
Jackson_lv 0:3fe14de7b0cf 113 //return:SD card respond
Jackson_lv 0:3fe14de7b0cf 114 uint8_t SD_SendCmd(uint8_t cmd, uint32_t arg, uint8_t crc)
Jackson_lv 0:3fe14de7b0cf 115 {
Jackson_lv 0:3fe14de7b0cf 116 uint8_t r1;
Jackson_lv 0:3fe14de7b0cf 117 uint8_t Retry=0;
Jackson_lv 0:3fe14de7b0cf 118 SD_DisSelect();//disable last enable
Jackson_lv 0:3fe14de7b0cf 119 if(SD_Select())return 0XFF;//select failed
Jackson_lv 0:3fe14de7b0cf 120 //send
Jackson_lv 0:3fe14de7b0cf 121 SD_SPI_ReadWriteByte(cmd | 0x40);//write order
Jackson_lv 0:3fe14de7b0cf 122 SD_SPI_ReadWriteByte(arg >> 24);
Jackson_lv 0:3fe14de7b0cf 123 SD_SPI_ReadWriteByte(arg >> 16);
Jackson_lv 0:3fe14de7b0cf 124 SD_SPI_ReadWriteByte(arg >> 8);
Jackson_lv 0:3fe14de7b0cf 125 SD_SPI_ReadWriteByte(arg);
Jackson_lv 0:3fe14de7b0cf 126 SD_SPI_ReadWriteByte(crc);
Jackson_lv 0:3fe14de7b0cf 127 if(cmd==CMD12)SD_SPI_ReadWriteByte(0xff);//Skip a stuff byte when stop reading
Jackson_lv 0:3fe14de7b0cf 128 //wait for respond or cvertime quit
Jackson_lv 0:3fe14de7b0cf 129 Retry=0X1F;
Jackson_lv 0:3fe14de7b0cf 130 do
Jackson_lv 0:3fe14de7b0cf 131 {
Jackson_lv 0:3fe14de7b0cf 132 r1=SD_SPI_ReadWriteByte(0xFF);
Jackson_lv 0:3fe14de7b0cf 133 }while((r1&0X80) && Retry--);
Jackson_lv 0:3fe14de7b0cf 134 //return state value
Jackson_lv 0:3fe14de7b0cf 135 return r1;
Jackson_lv 0:3fe14de7b0cf 136 }
Jackson_lv 0:3fe14de7b0cf 137 //��ȡSD����CID��Ϣ��������������Ϣ
Jackson_lv 0:3fe14de7b0cf 138 //����: u8 *cid_data(����CID���ڴ棬����16Byte��
Jackson_lv 0:3fe14de7b0cf 139 //����ֵ:0��NO_ERR
Jackson_lv 0:3fe14de7b0cf 140 // 1������
Jackson_lv 0:3fe14de7b0cf 141 uint8_t SD_GetCID(uint8_t *cid_data)
Jackson_lv 0:3fe14de7b0cf 142 {
Jackson_lv 0:3fe14de7b0cf 143 uint8_t r1;
Jackson_lv 0:3fe14de7b0cf 144 //��CMD10�����CID
Jackson_lv 0:3fe14de7b0cf 145 r1=SD_SendCmd(CMD10,0,0x01);
Jackson_lv 0:3fe14de7b0cf 146 if(r1==0x00)
Jackson_lv 0:3fe14de7b0cf 147 {
Jackson_lv 0:3fe14de7b0cf 148 r1=SD_RecvData(cid_data,16);//����16���ֽڵ�����
Jackson_lv 0:3fe14de7b0cf 149 }
Jackson_lv 0:3fe14de7b0cf 150 SD_DisSelect();//ȡ��Ƭѡ
Jackson_lv 0:3fe14de7b0cf 151 if(r1)return 1;
Jackson_lv 0:3fe14de7b0cf 152 else return 0;
Jackson_lv 0:3fe14de7b0cf 153 }
Jackson_lv 0:3fe14de7b0cf 154 //��ȡSD����CSD��Ϣ�������������ٶ���Ϣ
Jackson_lv 0:3fe14de7b0cf 155 //����:u8 *cid_data(����CID���ڴ棬����16Byte��
Jackson_lv 0:3fe14de7b0cf 156 //����ֵ:0��NO_ERR
Jackson_lv 0:3fe14de7b0cf 157 // 1������
Jackson_lv 0:3fe14de7b0cf 158 uint8_t SD_GetCSD(uint8_t *csd_data)
Jackson_lv 0:3fe14de7b0cf 159 {
Jackson_lv 0:3fe14de7b0cf 160 uint8_t r1;
Jackson_lv 0:3fe14de7b0cf 161 r1=SD_SendCmd(CMD9,0,0x01);//��CMD9�����CSD
Jackson_lv 0:3fe14de7b0cf 162 if(r1==0)
Jackson_lv 0:3fe14de7b0cf 163 {
Jackson_lv 0:3fe14de7b0cf 164 r1=SD_RecvData(csd_data, 16);//����16���ֽڵ�����
Jackson_lv 0:3fe14de7b0cf 165 }
Jackson_lv 0:3fe14de7b0cf 166 SD_DisSelect();//ȡ��Ƭѡ
Jackson_lv 0:3fe14de7b0cf 167 if(r1)return 1;
Jackson_lv 0:3fe14de7b0cf 168 else return 0;
Jackson_lv 0:3fe14de7b0cf 169 }
Jackson_lv 0:3fe14de7b0cf 170 //��ȡSD����������������������
Jackson_lv 0:3fe14de7b0cf 171 //����ֵ:0�� ȡ��������
Jackson_lv 0:3fe14de7b0cf 172 // ����:SD��������(������/512�ֽ�)
Jackson_lv 0:3fe14de7b0cf 173 //ÿ�������ֽ�����Ϊ512����Ϊ��������512������ʼ������ͨ��.
Jackson_lv 0:3fe14de7b0cf 174 uint32_t SD_GetSectorCount(void)
Jackson_lv 0:3fe14de7b0cf 175 {
Jackson_lv 0:3fe14de7b0cf 176 uint8_t csd[16];
Jackson_lv 0:3fe14de7b0cf 177 uint32_t Capacity;
Jackson_lv 0:3fe14de7b0cf 178 uint8_t n;
Jackson_lv 0:3fe14de7b0cf 179 uint16_t csize;
Jackson_lv 0:3fe14de7b0cf 180 //ȡCSD��Ϣ�������ڼ�����������0
Jackson_lv 0:3fe14de7b0cf 181 if(SD_GetCSD(csd)!=0) return 0;
Jackson_lv 0:3fe14de7b0cf 182 //����ΪSDHC�����������淽ʽ����
Jackson_lv 0:3fe14de7b0cf 183 if((csd[0]&0xC0)==0x40) //V2.00�Ŀ�
Jackson_lv 0:3fe14de7b0cf 184 {
Jackson_lv 0:3fe14de7b0cf 185 csize = csd[9] + ((uint16_t)csd[8] << 8) + 1;
Jackson_lv 0:3fe14de7b0cf 186 Capacity = (u32)csize << 10;//�õ�������
Jackson_lv 0:3fe14de7b0cf 187 }else//V1.XX�Ŀ�
Jackson_lv 0:3fe14de7b0cf 188 {
Jackson_lv 0:3fe14de7b0cf 189 n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
Jackson_lv 0:3fe14de7b0cf 190 csize = (csd[8] >> 6) + ((uint16_t)csd[7] << 2) + ((uint16_t)(csd[6] & 3) << 10) + 1;
Jackson_lv 0:3fe14de7b0cf 191 Capacity= (uint32_t)csize << (n - 9);//�õ�������
Jackson_lv 0:3fe14de7b0cf 192 }
Jackson_lv 0:3fe14de7b0cf 193 return Capacity;
Jackson_lv 0:3fe14de7b0cf 194 }
Jackson_lv 0:3fe14de7b0cf 195 //��ʼ��SD��
Jackson_lv 0:3fe14de7b0cf 196 uint8_t SD_Initialize(void)
Jackson_lv 0:3fe14de7b0cf 197 {
Jackson_lv 0:3fe14de7b0cf 198 uint8_t r1; // ����SD���ķ���ֵ
Jackson_lv 0:3fe14de7b0cf 199 uint16_t retry; // �������г�ʱ����
Jackson_lv 0:3fe14de7b0cf 200 uint8_t buf[4];
Jackson_lv 0:3fe14de7b0cf 201 uint16_t i;
Jackson_lv 0:3fe14de7b0cf 202
Jackson_lv 0:3fe14de7b0cf 203 SD_SPI_Init(); //��ʼ��IO
Jackson_lv 0:3fe14de7b0cf 204 SD_SPI_SpeedLow(); //���õ�����ģʽ
Jackson_lv 0:3fe14de7b0cf 205 for(i=0;i<10;i++)SD_SPI_ReadWriteByte(0XFF);//��������74������
Jackson_lv 0:3fe14de7b0cf 206 retry=20;
Jackson_lv 0:3fe14de7b0cf 207 do
Jackson_lv 0:3fe14de7b0cf 208 {
Jackson_lv 0:3fe14de7b0cf 209 r1=SD_SendCmd(CMD0,0,0x95);//����IDLE״̬
Jackson_lv 0:3fe14de7b0cf 210 }while((r1!=0X01) && retry--);
Jackson_lv 0:3fe14de7b0cf 211 SD_Type=0;//Ĭ���޿�
Jackson_lv 0:3fe14de7b0cf 212 if(r1==0X01)
Jackson_lv 0:3fe14de7b0cf 213 {
Jackson_lv 0:3fe14de7b0cf 214 if(SD_SendCmd(CMD8,0x1AA,0x87)==1)//SD V2.0
Jackson_lv 0:3fe14de7b0cf 215 {
Jackson_lv 0:3fe14de7b0cf 216 for(i=0;i<4;i++)buf[i]=SD_SPI_ReadWriteByte(0XFF); //Get trailing return value of R7 resp
Jackson_lv 0:3fe14de7b0cf 217 if(buf[2]==0X01&&buf[3]==0XAA)//���Ƿ�֧��2.7~3.6V
Jackson_lv 0:3fe14de7b0cf 218 {
Jackson_lv 0:3fe14de7b0cf 219 retry=0XFFFE;
Jackson_lv 0:3fe14de7b0cf 220 do
Jackson_lv 0:3fe14de7b0cf 221 {
Jackson_lv 0:3fe14de7b0cf 222 SD_SendCmd(CMD55,0,0X01); //����CMD55
Jackson_lv 0:3fe14de7b0cf 223 r1=SD_SendCmd(CMD41,0x40000000,0X01);//����CMD41
Jackson_lv 0:3fe14de7b0cf 224 }while(r1&&retry--);
Jackson_lv 0:3fe14de7b0cf 225 if(retry&&SD_SendCmd(CMD58,0,0X01)==0)//����SD2.0���汾��ʼ
Jackson_lv 0:3fe14de7b0cf 226 {
Jackson_lv 0:3fe14de7b0cf 227 for(i=0;i<4;i++)buf[i]=SD_SPI_ReadWriteByte(0XFF);//�õ�OCRֵ
Jackson_lv 0:3fe14de7b0cf 228 if(buf[0]&0x40)SD_Type=SD_TYPE_V2HC; //����CCS
Jackson_lv 0:3fe14de7b0cf 229 else SD_Type=SD_TYPE_V2;
Jackson_lv 0:3fe14de7b0cf 230 }
Jackson_lv 0:3fe14de7b0cf 231 }
Jackson_lv 0:3fe14de7b0cf 232 }else//SD V1.x/ MMC V3
Jackson_lv 0:3fe14de7b0cf 233 {
Jackson_lv 0:3fe14de7b0cf 234 SD_SendCmd(CMD55,0,0X01); //����CMD55
Jackson_lv 0:3fe14de7b0cf 235 r1=SD_SendCmd(CMD41,0,0X01); //����CMD41
Jackson_lv 0:3fe14de7b0cf 236 if(r1<=1)
Jackson_lv 0:3fe14de7b0cf 237 {
Jackson_lv 0:3fe14de7b0cf 238 SD_Type=SD_TYPE_V1;
Jackson_lv 0:3fe14de7b0cf 239 retry=0XFFFE;
Jackson_lv 0:3fe14de7b0cf 240 do //�ȴ��˳�IDLEģʽ
Jackson_lv 0:3fe14de7b0cf 241 {
Jackson_lv 0:3fe14de7b0cf 242 SD_SendCmd(CMD55,0,0X01); //����CMD55
Jackson_lv 0:3fe14de7b0cf 243 r1=SD_SendCmd(CMD41,0,0X01);//����CMD41
Jackson_lv 0:3fe14de7b0cf 244 }while(r1&&retry--);
Jackson_lv 0:3fe14de7b0cf 245 }else//MMC����֧��CMD55+CMD41ʶ��
Jackson_lv 0:3fe14de7b0cf 246 {
Jackson_lv 0:3fe14de7b0cf 247 SD_Type=SD_TYPE_MMC;//MMC V3
Jackson_lv 0:3fe14de7b0cf 248 retry=0XFFFE;
Jackson_lv 0:3fe14de7b0cf 249 do //�ȴ��˳�IDLEģʽ
Jackson_lv 0:3fe14de7b0cf 250 {
Jackson_lv 0:3fe14de7b0cf 251 r1=SD_SendCmd(CMD1,0,0X01);//����CMD1
Jackson_lv 0:3fe14de7b0cf 252 }while(r1&&retry--);
Jackson_lv 0:3fe14de7b0cf 253 }
Jackson_lv 0:3fe14de7b0cf 254 if(retry==0||SD_SendCmd(CMD16,512,0X01)!=0)SD_Type=SD_TYPE_ERR;//�����Ŀ�
Jackson_lv 0:3fe14de7b0cf 255 }
Jackson_lv 0:3fe14de7b0cf 256 }
Jackson_lv 0:3fe14de7b0cf 257 SD_DisSelect();//ȡ��Ƭѡ
Jackson_lv 0:3fe14de7b0cf 258 SD_SPI_SpeedHigh();//����
Jackson_lv 0:3fe14de7b0cf 259 if(SD_Type)return 0;
Jackson_lv 0:3fe14de7b0cf 260 else if(r1)return r1;
Jackson_lv 0:3fe14de7b0cf 261 return 0xaa;//��������
Jackson_lv 0:3fe14de7b0cf 262 }
Jackson_lv 0:3fe14de7b0cf 263 //��SD��
Jackson_lv 0:3fe14de7b0cf 264 //buf:���ݻ�����
Jackson_lv 0:3fe14de7b0cf 265 //sector:����
Jackson_lv 0:3fe14de7b0cf 266 //cnt:������
Jackson_lv 0:3fe14de7b0cf 267 //����ֵ:0,ok;����,ʧ��.
Jackson_lv 0:3fe14de7b0cf 268 uint8_t SD_ReadDisk(uint8_t*buf,uint32_t sector,u8 cnt)
Jackson_lv 0:3fe14de7b0cf 269 {
Jackson_lv 0:3fe14de7b0cf 270 uint8_t r1;
Jackson_lv 0:3fe14de7b0cf 271 if(SD_Type!=SD_TYPE_V2HC)sector <<= 9;//ת��Ϊ�ֽڵ�ַ
Jackson_lv 0:3fe14de7b0cf 272 if(cnt==1)
Jackson_lv 0:3fe14de7b0cf 273 {
Jackson_lv 0:3fe14de7b0cf 274 r1=SD_SendCmd(CMD17,sector,0X01);//������
Jackson_lv 0:3fe14de7b0cf 275 if(r1==0)//ָ��ͳɹ�
Jackson_lv 0:3fe14de7b0cf 276 {
Jackson_lv 0:3fe14de7b0cf 277 r1=SD_RecvData(buf,512);//����512���ֽ�
Jackson_lv 0:3fe14de7b0cf 278 }
Jackson_lv 0:3fe14de7b0cf 279 }else
Jackson_lv 0:3fe14de7b0cf 280 {
Jackson_lv 0:3fe14de7b0cf 281 r1=SD_SendCmd(CMD18,sector,0X01);//����������
Jackson_lv 0:3fe14de7b0cf 282 do
Jackson_lv 0:3fe14de7b0cf 283 {
Jackson_lv 0:3fe14de7b0cf 284 r1=SD_RecvData(buf,512);//����512���ֽ�
Jackson_lv 0:3fe14de7b0cf 285 buf+=512;
Jackson_lv 0:3fe14de7b0cf 286 }while(--cnt && r1==0);
Jackson_lv 0:3fe14de7b0cf 287 SD_SendCmd(CMD12,0,0X01); //����ֹͣ����
Jackson_lv 0:3fe14de7b0cf 288 }
Jackson_lv 0:3fe14de7b0cf 289 SD_DisSelect();//ȡ��Ƭѡ
Jackson_lv 0:3fe14de7b0cf 290 return r1;//
Jackson_lv 0:3fe14de7b0cf 291 }
Jackson_lv 0:3fe14de7b0cf 292 //дSD��
Jackson_lv 0:3fe14de7b0cf 293 //buf:���ݻ�����
Jackson_lv 0:3fe14de7b0cf 294 //sector:��ʼ����
Jackson_lv 0:3fe14de7b0cf 295 //cnt:������
Jackson_lv 0:3fe14de7b0cf 296 //����ֵ:0,ok;����,ʧ��.
Jackson_lv 0:3fe14de7b0cf 297 uint8_t SD_WriteDisk(uint8_t*buf,uint32_t sector,uint8_t cnt)
Jackson_lv 0:3fe14de7b0cf 298 {
Jackson_lv 0:3fe14de7b0cf 299 uint8_t r1;
Jackson_lv 0:3fe14de7b0cf 300 if(SD_Type!=SD_TYPE_V2HC)sector *= 512;//ת��Ϊ�ֽڵ�ַ
Jackson_lv 0:3fe14de7b0cf 301 if(cnt==1)
Jackson_lv 0:3fe14de7b0cf 302 {
Jackson_lv 0:3fe14de7b0cf 303 r1=SD_SendCmd(CMD24,sector,0X01);//������
Jackson_lv 0:3fe14de7b0cf 304 if(r1==0)//ָ��ͳɹ�
Jackson_lv 0:3fe14de7b0cf 305 {
Jackson_lv 0:3fe14de7b0cf 306 r1=SD_SendBlock(buf,0xFE);//д512���ֽ�
Jackson_lv 0:3fe14de7b0cf 307 }
Jackson_lv 0:3fe14de7b0cf 308 }else
Jackson_lv 0:3fe14de7b0cf 309 {
Jackson_lv 0:3fe14de7b0cf 310 if(SD_Type!=SD_TYPE_MMC)
Jackson_lv 0:3fe14de7b0cf 311 {
Jackson_lv 0:3fe14de7b0cf 312 SD_SendCmd(CMD55,0,0X01);
Jackson_lv 0:3fe14de7b0cf 313 SD_SendCmd(CMD23,cnt,0X01);//����ָ��
Jackson_lv 0:3fe14de7b0cf 314 }
Jackson_lv 0:3fe14de7b0cf 315 r1=SD_SendCmd(CMD25,sector,0X01);//����������
Jackson_lv 0:3fe14de7b0cf 316 if(r1==0)
Jackson_lv 0:3fe14de7b0cf 317 {
Jackson_lv 0:3fe14de7b0cf 318 do
Jackson_lv 0:3fe14de7b0cf 319 {
Jackson_lv 0:3fe14de7b0cf 320 r1=SD_SendBlock(buf,0xFC);//����512���ֽ�
Jackson_lv 0:3fe14de7b0cf 321 buf+=512;
Jackson_lv 0:3fe14de7b0cf 322 }while(--cnt && r1==0);
Jackson_lv 0:3fe14de7b0cf 323 r1=SD_SendBlock(0,0xFD);//����512���ֽ�
Jackson_lv 0:3fe14de7b0cf 324 }
Jackson_lv 0:3fe14de7b0cf 325 }
Jackson_lv 0:3fe14de7b0cf 326 SD_DisSelect();//ȡ��Ƭѡ
Jackson_lv 0:3fe14de7b0cf 327 return r1;//
Jackson_lv 0:3fe14de7b0cf 328 }
Jackson_lv 0:3fe14de7b0cf 329
Jackson_lv 0:3fe14de7b0cf 330
Jackson_lv 0:3fe14de7b0cf 331
Jackson_lv 0:3fe14de7b0cf 332
Jackson_lv 0:3fe14de7b0cf 333
Jackson_lv 0:3fe14de7b0cf 334
Jackson_lv 0:3fe14de7b0cf 335
Jackson_lv 0:3fe14de7b0cf 336
Jackson_lv 0:3fe14de7b0cf 337
Jackson_lv 0:3fe14de7b0cf 338
Jackson_lv 0:3fe14de7b0cf 339
Jackson_lv 0:3fe14de7b0cf 340
Jackson_lv 0:3fe14de7b0cf 341
Jackson_lv 0:3fe14de7b0cf 342
Jackson_lv 0:3fe14de7b0cf 343
Jackson_lv 0:3fe14de7b0cf 344
Jackson_lv 0:3fe14de7b0cf 345
Jackson_lv 0:3fe14de7b0cf 346
Jackson_lv 0:3fe14de7b0cf 347
Jackson_lv 0:3fe14de7b0cf 348
Jackson_lv 0:3fe14de7b0cf 349
Jackson_lv 0:3fe14de7b0cf 350
Jackson_lv 0:3fe14de7b0cf 351
Jackson_lv 0:3fe14de7b0cf 352
Jackson_lv 0:3fe14de7b0cf 353
Jackson_lv 0:3fe14de7b0cf 354
Jackson_lv 0:3fe14de7b0cf 355
Jackson_lv 0:3fe14de7b0cf 356
Jackson_lv 0:3fe14de7b0cf 357
Jackson_lv 0:3fe14de7b0cf 358
Jackson_lv 0:3fe14de7b0cf 359