About cmeyers

cmeyers · 2015-05-11

Posted on May 11, 2015 at 20:16Hello,We have been using STM32F205VB6 in production for several years. In a recent batch we purchased a high percentage of processors the boot loader doesn't work over USB properly. We have a jumper tied to BOOT0 pin a...

cmeyers · 2015-07-01

Posted on July 02, 2015 at 00:06We made some progress on this problem. There is some behavior change related to the Boot0 and Boot1 pins when the processor is held in reset.Normally the processor does not care about the Boot1 pin when Boot0 is pulle...

cmeyers · 2015-05-11

Posted on May 12, 2015 at 03:17Sorry, I forgot to answer your second question. The crystal is not used, the internal clock is used. The external crystal is never started when in the bootloader mode. This is one of the first things I checked.

cmeyers · 2015-05-11

Posted on May 12, 2015 at 03:09BOOT1 pin is left open/floating. I pulled the pin low with a wire and it did not make a difference.Here is the main problem, using openocd and JTAG I reset and halt the core and look at the PC value. The first one is n...

cmeyers · 2015-05-11

Posted on May 12, 2015 at 00:05Also the System memory contents are the same.Must be a hardware thing. Could be a problem with the USB but I can load the program through the JTAG and the board functions normally but I can no longer load over USB from...

cmeyers · 2015-05-11

Posted on May 11, 2015 at 23:38According to the Bootloader ID they are equivalent.

User statistics

User Activity

STM32F205 has bad bootloader from factory?

Re: STM32F205 has bad bootloader from factory?

Re: STM32F205 has bad bootloader from factory?

Re: STM32F205 has bad bootloader from factory?

Re: STM32F205 has bad bootloader from factory?

Re: STM32F205 has bad bootloader from factory?