Search found 27 matches

by zhengyang0512
Fri Jun 23, 2017 3:26 pm
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Re: Synchronous Sample Rate Conversion Problem

Hi, AN00230 has not been written yet. But actually I don't think this is what you need. I don't need to make a sample rate conversion, instead, I just want to transfer the music without change the sample rate. Do you need to cross asynchronous clock domains? If so, ASRC is what you need even if the...
by zhengyang0512
Fri Jun 23, 2017 3:14 pm
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Re: Synchronous Sample Rate Conversion Problem

The code in ASRC app note AN00231 is optimised for size rather than performance, but it may work at 192kHz/176kHz in AND out. You could try: increasing this to 64: #define ASRC_N_IN_SAMPLES You could temporarily try this (overclock by 20%) to see how far off the MIPs are (please note this is not a ...
by zhengyang0512
Thu Jun 22, 2017 9:39 am
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Re: Synchronous Sample Rate Conversion Problem

If you are slave on one side and master on the then you don't need any SRC at all? Can't the I2S master drive the I2S slave LRCLK and BCLK lines? Did you mean that if the data path is spdif in->spdif rx(xmos)->i2s slave(xmos) -> i2s master(dsp) then I don't need to use the asrc or the ssrc lib func...
by zhengyang0512
Thu Jun 22, 2017 9:27 am
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Re: Synchronous Sample Rate Conversion Problem

Thank you for your reply, my clock architecture is on the attachments file. I am now trying to follow your suggestion.
by zhengyang0512
Thu Jun 22, 2017 6:16 am
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Re: Synchronous Sample Rate Conversion Problem

Do you need to cross asynchronous clock domains? If so, ASRC is what you need even if the fIN and fOUT are nominally the same. However ASRC cannot currently work with above 176.4KHz on both sides without further optimisation, although it might be possible with a large block size Yes, the clock of t...
by zhengyang0512
Wed Jun 21, 2017 3:04 pm
Forum: Development Tools and Programming
Topic: Synchronous Sample Rate Conversion Problem
Replies: 8
Views: 8010

Synchronous Sample Rate Conversion Problem

Hi, I'm doing a project about receiving the music from the spdif receive module and output the music to the I2S module. My reference software is the AN00231_ASRC_SPDIF_TO_DAC . However, the software is about the asynchronous sample rate conversion and the supported the sample rate is between the 44....
by zhengyang0512
Tue Jun 20, 2017 3:51 am
Forum: 中文讨论区
Topic: 中国区客户技术支持怎么获得?
Replies: 11
Views: 82801

Re: 中国区客户技术支持怎么获得?

wilsonzhang wrote:好的, 我今天会让代理商技术支持跟你联系
感谢,今天代理商已经联系我了。
by zhengyang0512
Tue Jun 20, 2017 2:59 am
Forum: 中文讨论区
Topic: 中国区客户技术支持怎么获得?
Replies: 11
Views: 82801

Re: 中国区客户技术支持怎么获得?

wilsonzhang wrote:
zhengyang0512 wrote:
wilsonzhang wrote:感谢这些热心的用户,我们中国区有fae ,代理商也有fae ,有任何问题可以联系我们
你好,请问怎么联系你们的FAE呢?
你方便告诉我你是在哪个城市吗?
我在江苏无锡,如果方便的话麻烦你电话或者邮件联系一下我可以么?感觉这样沟通效率真的非常低下,我的Tel:132-9664-3804,我的email:zhengyang.hubu@foxmail.com。非常感谢!
by zhengyang0512
Sat Jun 17, 2017 12:56 pm
Forum: 中文讨论区
Topic: 中国区客户技术支持怎么获得?
Replies: 11
Views: 82801

Re: 中国区客户技术支持怎么获得?

wilsonzhang wrote:感谢这些热心的用户,我们中国区有fae ,代理商也有fae ,有任何问题可以联系我们
你好,请问怎么联系你们的FAE呢?
by zhengyang0512
Thu Jun 15, 2017 9:51 am
Forum: Development Tools and Programming
Topic: I2S Master to I2S Slave problem
Replies: 5
Views: 7520

Re: I2S Master to I2S Slave problem

Oh, I found the two reasons which cause the problem: First, the I2S slave clock should be stable. At the beginning of my test, I use the oscilloscope to test the signal of my crystal vibration source at BCLK and LRCLK. The two clock changes all the time, although the range is not very big. I choose ...