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Questions tagged [stm32f2]

Anything related to the STM32F2 series of microcontrollers. This series is characterized by a high degree of integration combining up to 1 Mbyte of Flash memory and up to 128 Kbytes of SRAM with Ethernet MAC, USB 2.0 HS OTG, camera interface, hardware encryption support and external memory interface.

2
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1answer
555 views

How can I configure PHY in cubeMX on own board?

I made a customboard using STM32f217VET microcontroller and KSZ8081 PHY (builtin pull-up resistors for TXP TXM and RXP RXM). I Configured my board to use MII mode, anda I used a 25MHz oscillator to do ...
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1answer
8k views

STM32F20x ADC sampling time/rate

I need to calculate the exact sampling time or sampling rate for my setup on a STM32F205. I have the ADC setup as follow: ...
4
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2answers
2k views

“Backup SRAM” vs “backup registers”

Today I was looking at STM32F205 datasheet. this MCU has a feature. except 20 × 32 bit backup registers, it has 4 KB Backup SRAM. and due to datasheet: And look at this: Does "Backup SRAM" get erase ...
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1answer
353 views
2
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1answer
2k views

STM32F205VC: USART framing error?

I'm trying to use USART in my program on STM32F205VC, but instead of sending my data I get some weird chars in PuTTY. I've used a Saleae Logical Analyzer and the result looks like this: This is my ...
1
vote
0answers
309 views

STM32 F205VCT6: GPIO B Port 6 and 7 do not work?

I'm using the STM32 F205VCT6. I have a simple blinking LED program written in C++ with VisualGDB (and VS 2013 Community). It works fine for pins like A1 and E2, but it doesn't for B6 and B7, where I ...
-1
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1answer
357 views

STM32F205 - can i use a timer to generate a low pulse of specified length

I want a pin to be high by default and then generate two 125-250 µs pulses with 0.1 µs resolution using a command. I was thinking about using TIM1 in one-pulse mode but I don't see a way to invert the ...
3
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1answer
6k views

Driving a LED with an open drain digital output

I need to drive an LED from an STM32F217ZG. So I was thinking about a classic circuit with a BJT. But then I saw that GPIO outputs of the microcontroller are configurable as open drain. Would this ...