User friendly USB mass storage for VS1010D

[Panu]

Hi all!

Here's a nice little VS1010D program for running USB mass storage from the command line or from inside your program.

- Shows VS1010D's SD card or SPI flash to the PC using USB port.
- Does not call reboot.
- System state is not lost during USB operation.
- Uses only 300 words of code memory and 70 words X data memory (also needs one file buffer).
- Can be called from the command line ("UMS D" for SD card, "UMS F" for SPI flash).
- Can be called from user program, (RunLib("UMS","D"); or RunLib("UMS","F");).
- Should safely flush dangling writes.
- Exits if USB cable is disconnected.
- Exits if USB disk is ejected.
- Exits if ESC is received from the UART.

-Panu

ums.png (55.76 KiB) Viewed 66 times

[Panu]

Here's another version, optimized for use with SPI flash and software development.

This one checks sdSize to see if SD card is found or not. If not, then it automatically shows the SPI flash in the USB, instead of what parameter the user has given.

One other good feature is that if you send 's' (lower case s) from UART when the mass storage is active, the USB connection is terminated and UART shell is immediately activated. And it also works with VS1010C.

Here's my CONFIG.TXT contents at the moment, in the SPI flash:

[?]
echo mass storage
ums F
play r:hello.mp3

This way when I boot the board in runlevel 15, the MSC is activated and I can copy new firmware from the PC to the SPI flash (I have no SD card present). Then when I press 's', I get the command prompt and I can run my new firmware from there. Then I say "REBOOT 15" and get the USB disk again, so I can upload new firmware version. And so on.