Mp3tag chip1/27/2024 I like the Sandisk range, the sound is good and until I got my hands on a Sport I didn’t have a bad word to say. Sure, I could play songs from folders on the Sport but that isn’t why I bought the **bleep** thing. Just connecting it to sync a podcast takes almost 30 minutes after disconnecting to refresh the library. I would continue with the Clip+ with Sandisk firmware but it takes too **bleep** long to refresh the library because of the large memory card I have. How can this still be a problem after 2 years? How can Sandisk screw up something so simple? I returned to this forum and saw a few other people with a similar problem. I tried a few different playlist formats, relative paths, different folder options and nothing works. I removed the card, put it in my mobile phone and all the songs are shown. I removed the card, put it in the Clip+ and the playlists show all songs. Once again songs were missing from the playlist even though the songs were copied on to the player and I could play them via the folder. I updated the firmware to v1.29 and synced a few playlists. I basically abandoned the unit to a drawer and carried on using the Clip+ running Rockbox but now I am so tired of the small screen I decided to look at the Sport again. Once I did I realized the LCD was upside-down! Instead of spending the time to correct this, I made a longer cable for the LCD and had it twist around.It’s been just over 2 years since I posted about the playlist problems I had after buying a Sport. Also, I did the LCD pinout before putting the LCD on the board. Not a terribly bad thing, but it was a drag at first. It was too late to unsolder at that point (or too difficult), so I made one cable that was female on both ends, and I bought a gender changer for the other serial port. Connectors!!!!! I used the wrong type of DB-9 connector (male instead of female).Because I assumed that the root directory was simply another file in the data segment (as it is in FAT32), none of my calculation for finding the starting location of files would work. No, The root directory comes directly AFTER the FAT, but BEFORE the data segment. For example, I didn't realize until the very end that the location of the root directory is NOT stored in the data portion pointed to by the FAT table. I spent a long time realizing the tiny quirks and differences between FAT16 and FAT32 that can ruin your life. Most people will refer you to the Microsoft specification, which can hardly be called a specification, since it really is written in such a manner that it expects you to already know FAT. (You might be able to see this on the picture from the back.) I had to correct my errors by soldering tiny jumper wires on the board. By the way, if a nice guy in the Czech Republic offers to solder the chip onto the PCB for you for a nominal fee, don't hesitate to let him do it! Soldering a PQFP64 can be a hugh nightmare, and I ended up stripping PCB traces off the board when I made a few mistakes. Soldering is hard: I easily spend over 16 hours in the soldering process overall.Cables can be unreliable: I spent a day troubleshooting a problem with the LCD, which ended up being a cable where adjacent pins had shorted together.Here are a few interesting lessons I have learned: I have a very good understanding of ATA, I2C, FAT, and MP3 files. Regardless of my shortcomings, I have learned a great deal by doing this project. At the moment, I have successfully read and written the control and status registers and memory locations within the MAS. As a result, I have had very little time to work with interfacing with the MAS. As a result, I did not have the hardware design complete until December. Unfortunately a lot of my hardware didn't come in until late November, most notably the PCB for the MAS. What is not yet implemented is the transfer of the MP3 stream from the AVR to the MAS. It can also access the PCF8574 and MAS3587F through the I2C bus. It can display the MP3 TAG information out to the LCD. It CAN exercise the ATA interface and access files using the FAT. Overall it turned out pretty well.Īt the moment, the code is very incomplete. The pictures clearly show the design methodolgy I used, which was to use ribbon connectors where possible, and adapter boards for smaller sized packages. Here are some pictures of the finished design. Soundwave MP3 - Results and Lessons Soundwave MP3
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