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markmcwired9
Visitor II
May 8, 2007
Question

Baud rate problem on STR911

  • May 8, 2007
  • 2 replies
  • 795 views
Posted on May 08, 2007 at 08:36

Baud rate problem on STR911

    This topic has been closed for replies.

    2 replies

    M
    markmcwired9Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:42

    Hi. After testing the UART demo program on a STR912-SK and checking that everything worked fine, I downloaded the program to a custom board with a STR911FM44X6. I did the adjustments on General Options (EWARM) to use the STR911, but now I have a baud rate problem.

    At 9600bauds it works fine, but at 19200bauds I see some wrong characters. Beyond that speed, is pure garbage. The program is the same, except that I use GPIO6.7 for UART0_TX (with no RX) and I do an infinite loop in the transmitting sequence. The port setting is 115200, 8, N, 1.

    I've changed the 25Mhz crystals for different series and I've used 20Mhz crystals also( I did adjust the PLL setting), but the result is the same.

    Is there any other adjustment that I have to make to use the UART on a STR911 ?

    Mark.

    M
    mariusz2
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:42

    Hi. I was similar problem look in forum ''pll clock prblem str911fm44''

    I unitie this problem:

    I create 91c_conf.h with correctly value crystal, and compile new library STR91X.lib in directory C:\RIDEarm\LIB\STRX

    project library exist in directory C:\RIDEarm\LIB\STRX\STR91X_LIB

    next i replace oryginal lib (for security, I rename oryginal lib)

    may by this help Yoy

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