Search found 18 matches

by dkybchoi
Wed Mar 04, 2020 5:09 am
Forum: Other Applications
Topic: Create Data Partition with FAT on external QSPI flash for saving WAV file and playback
Replies: 2
Views: 7131

Create Data Partition with FAT on external QSPI flash for saving WAV file and playback

Dear All, As captioned subject, we would like to use XU chip to implement audio recording and playback functions and support USB Mass Storage Class ( i.e. user can write or delete WAV file from PC ) . My questions are : 1. For example using sample rate 48KHz and one stereo audio , is it feasible to ...
by dkybchoi
Wed Sep 13, 2017 2:36 am
Forum: Other Applications
Topic: DFU Process got stuck in XU224 board
Replies: 11
Views: 20277

Re: DFU Process got stuck in XU224 board

Hi ffomich , Thanks for your clarification
by dkybchoi
Thu Sep 07, 2017 4:27 am
Forum: Other Applications
Topic: DFU Process got stuck in XU224 board
Replies: 11
Views: 20277

Re: DFU Process got stuck in XU224 board

HI ffomich, Thanks for your sharing. We got the different error message "xrun: Program received signal ET_LOAD_STORE, Memory access exception. But I am not sure if it reflects the real cause of DFU failure. Because DFU is working properly if we simply change the .XN to force FW to be compiled t...
by dkybchoi
Tue Sep 05, 2017 3:20 am
Forum: Other Applications
Topic: DFU Process got stuck in XU224 board
Replies: 11
Views: 20277

Re: DFU Process got stuck in XU224 board

One of possible cause is related to the reboot problem in XU224, is it required to update anything in reboot routine for XU224 ? We found that it seems the reboot function in reboot.xc cannot not work properly for XU224. It should be the reason why DFU is not working. Can someone has experience in X...
by dkybchoi
Mon Sep 04, 2017 4:27 pm
Forum: Other Applications
Topic: DFU Process got stuck in XU224 board
Replies: 11
Views: 20277

DFU Process got stuck in XU224 board

HI All, We are porting the codes from XU216 to XU224. Everything looks fine but DFU when the FW is running in XU224. During DFU process, it always got stuck before start downloading the upgrade image, it seems that the unit is not able to enter DFU mode properly in XU224. We tried to debug by printi...
by dkybchoi
Fri Sep 01, 2017 4:17 pm
Forum: Development Tools and Programming
Topic: Determine the Minimum Size of QFlash Enough for DFU
Replies: 2
Views: 5306

Determine the Minimum Size of QFlash Enough for DFU

HI , If only one factory image and one upgrade image are required and no data partition, Is the minimum size of QFlash must be greater than the boot partition size calculated by below equation? boot partition size = loader size + maximum size of factory image + maximum size of upgrade images + paddi...
by dkybchoi
Mon Jul 17, 2017 11:37 am
Forum: Q&A
Topic: Different Channel Count with different sampling frequency
Replies: 3
Views: 7359

Re: Different Channel Count with different sampling frequency

Thanks for your reply. But I think it is different case. We need to change the channel count dynamically, it is not allowed to reboot the unit. Thanks anyway !
by dkybchoi
Fri May 12, 2017 9:52 am
Forum: Q&A
Topic: Different Channel Count with different sampling frequency
Replies: 3
Views: 7359

Different Channel Count with different sampling frequency

Hi , As I know in a bigger Audio Interface product, it is possible to change the channel count on the fly when we select different sampling frequency from PC ( Host) For example : At the sampling frequency 48KHz , the system can support 18 USB In and 18 USB Out . When we select higher sampling frequ...