Posted on December 22, 2014 at 17:36I have an existing STM32F407 family target that has a pulsed signal at PF9.  I need to measure the period of this signal.  This signal has a fixed low time followed by a variable high time.  PF9 can serve as an in...

Posted on May 11, 2013 at 16:20 I noticed the CPAL uses spin type waits including at least one in an interrupt (see code below). Thes e are u sed via the MACRO __CPAL_I2C_TIMEOUT. I have some concern with the one in the interrupt handl ...

Posted on April 16, 2013 at 16:40For my application I need to program external NOR flash via code executing on an STM32F4 family processor.  I see examples that read external flash but none that program it from code executing on an STM32F4 family pr...

Posted on March 01, 2013 at 22:32I would like to do a background CRC32 on FLASH such that I do 256 bytes at a time and get a final result.  The system must continue to run and meet RT deadlines while the CRC is calculated.  Additionally, communicati...

Posted on February 12, 2013 at 22:33I have a boot loader that resides in the first flash block of an STM32F4 family processor which is 16K begining at 0x08000000.  I would like the last four byte of the sector at 0x08003ffc to contain constant data ...