programming the control register (st7538)

[thorsten-kopp]

Posted on September 23, 2005 at 06:01

programming the control register (st7538)

[boicuflorin]

Posted on April 28, 2005 at 08:35

Hi Reny,

Sorry for my time response :( Please send me your email and then I send you my routine and we can talk about them. By.

[reinhard_larch]

Posted on May 04, 2005 at 16:30

Hi flo123,

here is my e-mail address: reinhard_larch@yahoo.com.au thanks a lot, very much appriciated!!! Regards reny

[boicuflorin]

Posted on May 12, 2005 at 06:55 Hi Reny, I send you an email ! By

[yuanye-28]

Posted on June 10, 2005 at 01:42

hi,flo123

Could you send me? my emial is

mailto:yuanye-28@163.com

thank you very much.

[boicuflorin]

Posted on September 20, 2005 at 10:55

Hi,

I want to implement an FEC (forward error correction) in my ST7538 modem. What algorithm you had use ??? can you give me a suggestion :) Thank's

[krapf]

Posted on September 21, 2005 at 11:13

Error Correction?

Well, I am using the old Hamming code. The amount of hamming bits to be used is up to you to decide... But there is a class of FEC codes called TURBO CODES that are much more efficient, but they need a lot of processing power. Rafael Krapf BRASIL

[info79]

Posted on September 23, 2005 at 05:50

Hi everybody,

I'm working with ST7538. I'm transmit between neutral fase and ground line to avoid problem in trifase system with 132,5 Khz frequency and 2400 baud. In some site I have problem of noise and the CD/PD line toggle. This problem occure some hours a day. By your esperience should I change some parameters as frequency or baud rate to improve the comunication ? I'm use a preamble byte every transmission to syncronize the comunication but during noise doesn't work correct. Have you suggest me a way to avoid noise by software ? What is the best configuration of register to avoid noise and have best performance ? Thanks to everybody help me....

[info79]

Posted on September 23, 2005 at 06:01

Hi Everybody,

another problem I have is a noise on clock CLR/T. In some device it's a stable but in other the clock swing. The hardware and components are the same. If I disconnect the transformer from line the clock became stable. Have you suggest something ? I have best performance with transformer 2:1. Thanks for help.