USB audio device has ended, the ADSP-2189 to achieve the above real-time recording and transferred to a computer via a USB audio device.
Next intends to
1 Review USB development process and summarized.
2 SD driven development began to get on ARM, now understand the FAT16 file system, SD, and plan before the end of this month be able to read files on the SD card and play TQ2440.
3 work ready to begin Acoustic Echo Cancellation work.
4 Prepare the first to write about the article on the development of USB, it is more difficult to own encountered in the development and understanding, not learning materials from the Internet excerpt.
2011.6.30 updated
Currently able to read and correctly calculated the SD card root directory address, FAT1 and FAT2 address. Then prepare to find the right set of clusters in FAT1 according to the document root directory cluster, and then the actual data storage area and looking to each data storage.
Not only to learn but also to be reviewed.
1. USB development summary, including command is sent, the endpoint, descriptror, bus, etc. knowledge.
2. SD summary of the development, including SD command is sent, read data, and so on knowledge.
3. FAT16 file system summary, including file system definition, address assignment, and so on knowledge.
Implemented on a compiler system 2440 4. linux, migration, file system migration.
Driver development 5. linux, there are more places to consider.
DMA knowledge and IIS, etc.: 6. there in the future.
Reproduced in: https: //www.cnblogs.com/artechliu/archive/2011/06/15/2081340.html