Re: USB on lpc2148
A couple options for starters,
You can use the LPC2148 as data logger. Battery driven it collects a temperature once a minute and writes it to its SRAM or vie IAP into Flash. Once a day you connect it to a PC to recharge the battery and to upload the data into an Excel spreadsheet.
Use it as an echogenerator. With the ADC you can collect analog data fill half of the SRAM with values and then start the output through the DAC. Has nothing to do with USB but you could receive the data from a soundfile from the PC and do the delay process and send it back. Play the original soundfile on the PC at the same time as you play the delayed file through a speaker on the evaluation board.
Bob