sdio sd卡解码MP3 出错，spi sd卡则没问题，什么原因呢

发布于 2013-06-23 11:24:03 浏览：4032 订阅该版

同样一张卡，用RTT1.10 STM32F407
SPI SD驱动取自ART
SDIO SD驱动取自realtouch-stm32f4-master
建立ELM文件系统

这是SDIO SD的：
```  | /
- RT -     Thread Operating System
 / |      1.1.0 build Jun 23 2013
 2006 - 2012 Copyright by rt-thread team
finsh>>error detected and set to -2/0 (cmd = 5),0x00000004
SD card capacity 1955840 KB
found part[0], begin: 32256, size: 1.885GB
sd0 mount to / ```
```finsh>>readspeed("/吴奇隆~1.MP3",2048)
File read speed: 3982800 byte/s
        32, 0x00000020```
```> Playing...          3/  6
  /郭欢-~1.mp3

SampleRate        44100 Hz
  BitRate           320 Kbps
  BitsPerSample     16 Bit
  Channels          2
  TimeTotal         00:04:16
  mp3_play Decode ERROR :-6
  mp3_play Decode ERROR :-6
  mp3_play Decode ERROR :-9
....```

SPI SD 的：
```  | /
- RT -     Thread Operating System
 / |      1.1.0 build Jun 23 2013
 2006 - 2012 Copyright by rt-thread team
finsh>>[MSD] 101 [info] SD card goto IDLE mode OK!
[MSD] 101 [info] CMD8 response : 0x01 0x00 0x00 0x01 0xAA
[MSD] 102 [info] Ver2.00 or later or SDHC or SDXC memory card!
[MSD] 102 [info] OCR is 0x00FF8000
[MSD] 103 [info] OCR 2nd read is 0x80FF8000
[MSD] 103 [info] It is SD2.0 standard capacity Card!!!
[MSD] 103 [info] CSD Version 1.0
[MSD] 104 [info] TRAN_SPEED: 0x32, 10Mbit/s.
[MSD] 104 [info] CSD : READ_BL_LEN : 10 1024byte
[MSD] 105 [info] CSD : C_SIZE : 3819
[MSD] 105 [info] CSD : C_SIZE_MULT : 7
[MSD] 105 [info] card capacity : 1910 Mbyte
sd0 mount to / 
```
```finsh>>readspeed("/吴奇隆~1.MP3",2048)
File read speed: 1052600 byte/s
        32, 0x00000020```

现在问题是SPI SD卡上播放正常，但SDIO SD卡是48K码率的可解码，高的就一直报错，断断续续的声音，像CD卡花了一样
修改SDIO的总线速度一样不成

去除RTT用裸机试，SDIO用官方驱动，还是一样SPI可以播，SDIO解码出错

不知如何解决