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joesnyder
Associate II
since ‎2018-07-20
‎2023-06-14

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  • 15 Posts
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User Activity

STM32F446 DMA Indexing

2017-03-22
Posted on March 22, 2017 at 22:54I ultimately need 'instant on' ADC conversions.  For instance, when a timing gate goes high, I need to start taking ADC values immediately (the signal is only 100us wide),  The problem I'm running into is the lag: fi...

STM32F446 ADCs Fighting Inputs

2017-03-09
Posted on March 09, 2017 at 16:59I am using a single channel on ADC1, and a single channel on ADC2, both using DMA.  Everything code-wise is working, but the ADCs appear to be fighting/resisting the inputs.  For instance, with nothing connected, eac...

STM32F4 Hard Crashes with I2C

2017-03-06
Posted on March 06, 2017 at 16:22I'm having a problem where I2C is hard crashing my STM32F446RET6 (programmed in EWARM with CubeMX as a starting point).  When I2C devices are enabled, at random amounts of time (couple hours to overnight), a .25 seco...

STM32F446 DAC won't drive to zero

2015-12-07
Posted on December 07, 2015 at 18:33 I have the DAC output of my STM32F44 feeding into a non-inverting op amp. Everything is working, but not real great. The problem is at the lower end, and gets worse the closer you get to zero. For ins...

STM32F4 Interrupt/DMA/Array issue

2015-09-03
Posted on September 03, 2015 at 19:21 I'm having a problem where when I try to access an array from within a timer interrupt callback, everything seems to fall apart. To keep it simple, I have: Timer 2 is set up to interrupt every 10us. ...
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