About hfs99

hfs99 · 2012-12-08

Posted on December 09, 2012 at 03:10I had a head-slap moment a few days ago. I eliminated much of the ''quirky behavior'' of my STM32F4Discovery board by having SystemInit() disable and reset the cache. The STM32F4Discovery was my first ST-Link prod...

hfs99 · 2011-04-30

Posted on April 30, 2011 at 16:58SDIO busy detect?

hfs99 · 2013-08-01

Posted on August 02, 2013 at 04:32 The messages you posted look ok to me. I've never tried qstlink but st-flash from the texane st-utils worked OK for me on Fedora 18 (3.9.11-fci686). I didn't have to run as root but you might try that. E.g. ...

hfs99 · 2013-08-01

Posted on August 01, 2013 at 18:35Dmitri did you look at the examples (if any) for the Nand-Flash (A) board that waveshare claims is compatible with the Open407V-D? I actually have one of these that arrived just a few days ago (along with the Open40...

hfs99 · 2012-12-30

Posted on December 30, 2012 at 19:40I wonder why the SDIO_FLAG_DTIMEOUT flag never gets set. Maybe the preceding code isn't setting the SDIO->DTIMOUT register? That won't be the root cause (of why SDIO_FLAG_RXDAVL is never set), but needs to be fixe...

hfs99 · 2012-12-30

Posted on December 30, 2012 at 18:28Sounds to me like you nearly have it nailed down. Unless you have other time-sensitive stuff going on, you can step into SDIO_SendCommand() and find out which line causes your exception. If necessary you can reset...

hfs99 · 2012-12-18

Posted on December 19, 2012 at 01:03 U6 can be used when the F4Discovery is the USB host supplying VBus for USB. In this case, when PC0 is driven low 5V will be connected to VBus. The /Fault line at PD5 is normally high but will go low if somethi...

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