• LPC2378 24 bit USB audio class device
    Has anyone had any success using the KEIL USB audio class application as a starting point for a a 24 bit audio device. I've made the obvious changes to the enumeration structure of the application code...
  • LPC2148 USB audio example
    This is regarding the 'LPC2148 USB audio example' available in this site. I have some confusions regarding the codes. The endpoint 3(out) is supposed to use DMA here. But in the SOF event callback, data...
  • Keil usb audio questions
    Hi if studied the keil usb-audio example: and there are two things I didn't understand. Maybe someone of you could give me some hints / explanations to these two code lines DataIn &= B_S - 1;...
  • USB audio device
    Hello every body. I work on Keil 4.54 and stm32discovery board (stm32F407VG). It is a cortex m4. I execute succesfully a rl-usb and hid program. But whenever I try to make an audio device, i fail...
  • USB audio card with mic
    Hi All, I am now working at build a USB sound card with MIC in STM32F4 Discovery board. Now I already had separate working speaker and microphone usb program. When I combine those two, the USB cannot...