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| Rev 119 | Rev 146 | ||
|---|---|---|---|
| Line 270... | Line 270... | ||
| 270 | 270 | ||
| 271 | SD_Result_t SDC_GetData(u8 CmdNo, u32 addr, u8 *Buffer, u32 len) |
271 | SD_Result_t SDC_GetData(u8 CmdNo, u32 addr, u8 *Buffer, u32 len) |
| 272 | { |
272 | { |
| 273 | u8 rsp; |
273 | u8 rsp; |
| - | 274 | u16 a, crc16; |
|
| 274 | u16 a, crc16; |
275 | u32 timeout; |
| Line 275... | Line 276... | ||
| 275 | SD_Result_t result = SD_ERROR_UNKNOWN; |
276 | SD_Result_t result = SD_ERROR_UNKNOWN; |
| 276 | 277 | ||
| 277 | // send the command |
278 | // send the command |
| 278 | rsp = SDC_SendCMDR1(CmdNo, addr); |
279 | rsp = SDC_SendCMDR1(CmdNo, addr); |
| 279 | if (rsp != R1_NO_ERR) |
280 | if (rsp != R1_NO_ERR) |
| 280 | { |
281 | { |
| 281 | result = SD_ERROR_BAD_RESPONSE; |
282 | result = SD_ERROR_BAD_RESPONSE; |
| 282 | goto end; |
283 | goto end; |
| - | 284 | } |
|
| 283 | } |
285 | SSC_ClearRxFifo(); |
| 284 | SSC_ClearRxFifo(); |
286 | timeout = SetDelay(500); |
| 285 | do |
287 | do |
| 286 | { |
288 | { |
| 287 | rsp = SSC_GetChar(); |
289 | rsp = SSC_GetChar(); |
| 288 | if((rsp & 0xF0) == 0x00) // data error token |
290 | if( ( (rsp & 0xF0) == 0x00 ) || CheckDelay(timeout) ) // data error token or timeout |
| 289 | { |
291 | { |
| 290 | result = SD_ERROR_READ_DATA; |
292 | result = SD_ERROR_READ_DATA; |
| 291 | goto end; |
293 | goto end; |
| Line 295... | Line 297... | ||
| 295 | for (a = 0; a < len; a++) // read the block from the SSC |
297 | for (a = 0; a < len; a++) // read the block from the SSC |
| 296 | { |
298 | { |
| 297 | Buffer[a] = SSC_GetChar(); |
299 | Buffer[a] = SSC_GetChar(); |
| 298 | } |
300 | } |
| 299 | // Read two bytes CRC16-Data checksum |
301 | // Read two bytes CRC16-Data checksum |
| 300 | crc16 = SSC_GetChar(); // highbyte fisrt |
302 | crc16 = SSC_GetChar(); // highbyte first |
| 301 | crc16 = (crc16<<8)|SSC_GetChar(); // lowbyte last |
303 | crc16 = (crc16<<8)|SSC_GetChar(); // lowbyte last |
| 302 | /* if(crc16 != CRC16(Buffer, len)) result = SD_ERROR_CRC_DATA; |
304 | /* if(crc16 != CRC16(Buffer, len)) result = SD_ERROR_CRC_DATA; |
| 303 | else */result = SD_SUCCESS; |
305 | else */result = SD_SUCCESS; |
| Line 304... | Line 306... | ||
| 304 | 306 | ||