Trantuete Posted October 4, 2012 Report Share Posted October 4, 2012 Hi, my first post here in the forum...let's start with a problem. If found similar topics in the forum, but my issue is a bit different. I finished my STM32 Core Module with my own PCB design. PCB is OK, everything I tested seems to work so far. BUT, when connecting it via USB to my WinXP computer, it's not recognized. I get the message that the device connected to the usb port was not installed properly and may not work. Then it's listed as "unknown device". I tried it in Bootloader Hold Mode, but same problem. I'm usig a STM32RCT6 runnig with a 8 MHz crystal. I flashed it via SWD with a STLink device. Is there anything I have to change in the software or configuration? Any ideas? I appreciate every reply regards Quote Link to comment Share on other sites More sharing options...
Shuriken Posted October 4, 2012 Report Share Posted October 4, 2012 Doesn't the STM32 Core use a 12Mhz crystal? Maybe you could have a search for that on the forum. Quote Link to comment Share on other sites More sharing options...
Trantuete Posted October 4, 2012 Author Report Share Posted October 4, 2012 Hi, thanks for the quick reply. The datasheet of the STM32 says: "The high-speed external (HSE) clock can be supplied with a 4 to 16 MHz crystal/ceramic resonator oscillator." So this should be no problem. Unfortunately I've got no 12MHz Crystal at hand to test it. Regards Quote Link to comment Share on other sites More sharing options...
Trantuete Posted October 4, 2012 Author Report Share Posted October 4, 2012 O.K. I will get myself a 12 MHz crystal and try. The µC might accept 8 MHz crystals but I guess the software configures it for 12. I'm not that much of a software shark, you know.... Quote Link to comment Share on other sites More sharing options...
Shuriken Posted October 4, 2012 Report Share Posted October 4, 2012 Yeah, that should do the trick. on a similar problem Quote Link to comment Share on other sites More sharing options...
Trantuete Posted October 4, 2012 Author Report Share Posted October 4, 2012 Thanks for your help so far. I'll be back for sure if something else doesn't work.... PS: did you know, that Arnold Schwarzenegger at first did not want to say that: "I'll be back"? He thought it sounded too feminine....little side information....unnecessary but funny... Quote Link to comment Share on other sites More sharing options...
TK. Posted October 4, 2012 Report Share Posted October 4, 2012 Shiruken is right: It will only work with a 12 MHz crystal, because the PLL is configured accordingly. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
Trantuete Posted October 5, 2012 Author Report Share Posted October 5, 2012 Works! Thank You... Regards Simon Quote Link to comment Share on other sites More sharing options...
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