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Questions tagged [stm32f7]

The tag has no usage guidance.

2
votes
1answer
56 views

Why is DMA running continuously?

I'm facing a strange behaviour of DMA which I cannot explain myself. I just want DMA to send a data block (i.e. one 32bit word) to the SAI peripherie and quit then and give a "transfer complete ...
0
votes
1answer
29 views

STM32F7: activate USART Receiver Timeout Interrupt (USART_RTOR.RTOF)

I want the STM32F769NI to generate an interrupt when a pause after a received byte on USART6 was detected. I cofigured USART6 with 9600 baud in asynchronous mode and enabled the receiver interrupt ...
0
votes
0answers
55 views

STM32: I2C no dataflow after a few seconds

I have a problem with my i2c connection. After a few seconds of reading the i2c readings stopped and i can't see any SDA signals with an osilloscope. I use CUBEMX5.0.1 and in the function ...
0
votes
1answer
71 views

STM32F769I-DISCO - Getting External LED to Blink; what am I missing?

I can't for the life of me figure out why I can't get an external LED to blink. I'm using Keil uVision 5 and STM32CubeMX; I've configured PD0 to be in output push/pull, with no pull up and no pull ...
0
votes
0answers
890 views

STM32F7 Timer and DMA

I'm currently trying to adapt the example project TIM_DMA of the F769I_EVAL to the STM32F746G discovery board. I'm quite new to STM32 and this might be an obvious error. The code creates a timer and ...
0
votes
0answers
38 views

STM32F7 slow systick issue

I am using the stm32f746vgt6 on a custom board v1.1. I just witnessed a strange occurrence that is intermittent and only on one board (so far). The systick interrupt was firing very slow. I'm ...
0
votes
0answers
4k views

ST-LINK “USB communication error”

I have a custom PCB (based heavily on the Nucleo board) using the STM32F767II. I am using Atollic TrueStudio on Windows 10 and programming it through the ST-LINK on the Nucleo board (header CN6). I ...
0
votes
0answers
299 views

Timer DMA requests through DMA1 clarification (stm32f722ze

I need some clarification on this, as it will help my program run smoother. I want to run 2 DMA's simultaneously. One which will send data out using the SDMMC1, which is linked to DMA2. Then I'd like ...
4
votes
2answers
1k views

Uart / Usart: use Rx-pin only

I am designing a board with an stm32f722 MCU (64 pin version) and I can't afford to waste / not use any GPIO. My question is following: Is there an option to only use the Rx-pin of a uart / usart so ...
0
votes
2answers
243 views

STM32F7 46 G Discovery setting TIM2 to 1 second

I'm learning to programm on an STM32F7 46 G Discovery board using Eclipse as an IDE and STM32CubeMX. I'm trying to set a timer (currently TIM2) to one second without using an ISR. I'd like to get a ...
1
vote
2answers
3k views

STM32 USB device - device descriptor request failed

I'm using STM32F7-45 on my own board, and I am trying to program USB device (I tried virtual COM and HID, separately). But after plugging into PC it is detected (after a while) with "Unknown device (...
2
votes
1answer
138 views

STM32F746 Clock not reporting as expected

I'm using an STM32F746VGT6 microcontroller configured from STM32CubeMX for all the clocks and I'm getting roughly 220% higher clock rates when compiled. For instance I have an HSE crystal at 11....
1
vote
3answers
1k views

stm32 gpio to dma

I have a few questions regarding using the DMA of the stm32f7 board (nucleo F722ZE ). 1) So to get started I'll explain what I'm doing: I need to read data from 2 GPIO pins (ADC) and will have a ...
1
vote
1answer
2k views

STM32F7 discovery USB device CDC using CubeMX

The thing I want to do is sending some bytes with STM32F7 discovery to my laptop, through USB (HS or FS). I tested the virtual com example provided by keil microvision so the hardware is OK, but I ...
1
vote
1answer
375 views

RFID RC522 with STM32F769I-Discovery

I'm trying to communicate with rc522 chip with the use of this code, I only modified the SPI calls to use the HAL libraries and initialized SPI with HAL libraries. Kept all other functions intact. Now ...
4
votes
2answers
1k views

Interfacing a STM32 MCU with an external ADC (and reading the data via SPI)

I want to use a STM32 microcontroller to read data from a multi-channel ADC. The microcontroller that I intend to use will most likely be something from the F7 series (such as STM32F746ZGT), whereas ...
1
vote
0answers
81 views

How to create address independent code for STM32F746?

I need to create an address independent, dynamically reallocable code for STM32F746: a code (program) that I will store in one place (i.e. external Flash), than load it into the RAM (internal or ...
0
votes
0answers
340 views

Nested Interrupts - Design with Finite State Machine

I am developping an event-drive embedded system that will use three kind of interrupts : timer interrupt, SPI interrupt and USART interrupt. I am working with an STM32F7 MCU and the idea is to use the ...
0
votes
1answer
241 views

PG2 GPIO output on Nucleo-F767ZI doesn't function

I have made a board on which I plug the Nucleo-F767ZI microcontroller board. There is one GPIO pin that I cannot get to function as a digital output: PG2. This is ...
-1
votes
1answer
108 views

STM32F769 Header Power Input

As a new STM32 user, I would like to know if it is possible to connect unregulated voltages (6.2V to 9V) to a Power input pin on the headers as same as on the Arduino? The board I'm using is ...
0
votes
1answer
152 views

Design advice for asynchronous operations requiring a delay using STM32F7

n00b advice is needed. I am trying to figure out the best approach to delay an operation of relatively small value (10-5000 microseconds) without slowing down the main run loop. I assume I'm ...
1
vote
0answers
426 views

Keil - Configuring Logic Analyzer tool

I am working with the Keil compiler in a project using the STM32F769I-DISC1. For debugging I use the ST-Link provided by the board. The idea is to use the on-chip DAC using TIM6 for triggering the ...
3
votes
1answer
85 views

Can I start a new uart1 interrupt function inside a previous uart1 interrupt complete callback function?

I am using STM32F46ZG NUCLEO discovery board. My code is like: ...
0
votes
1answer
498 views

STM32F7 Discovery LTDC unit - changing system clock

I have strange experiences with display on my F7 Discovery board. When working with 216MHz system clock, the display (LTDC) works properly. However after changing to 120MHz (using CubeMX, so the app ...
0
votes
1answer
1k views

STM32F7 CubeMX FreeRTOS and USB CDC

I'm using FreeRTOS generated with the help of CubeMX. Everything was working fine until I added USB CDC unit. When I used CDC_Transmit_FS() before starting kernel, I could receive data over USB. ...
0
votes
1answer
1k views

how to set up SPI communication between a STM32F746ZG and a MCP2515

I am trying to communicate my STM32F746ZG microcontroller with a MCP2515 and am having a problem where I don't believe the MCP2515 is receiving anything I have sent via SPI. The reason I have come ...
0
votes
1answer
426 views

stm32 audio levels

I'm using an STM32F746G for exploring embedded audio DSP. My experiments sound great in headphones but when I connect the audio output to external amplifiers, the signal level is low and there's a ...
0
votes
2answers
3k views

STM32F7 Discovery USB CDC using CubeMX [closed]

I've created a project in CubeMX for my F7 Discovery. I followed instructions form here. However, in my Device Manager on Windows nothing appears. When I used precompiled code from link I was assured ...
7
votes
2answers
10k views

STM32F7 gets stuck in external interrupt callback function

i am working on a project to connect a camera to an STM32F7 Discovery board using the DCMI interface. The camera part works fine, but i have a strange problem with external interrupts from the ...
1
vote
1answer
875 views

Writing STM32F7 code without external files?

How to start coding for STM32F7 platform without any external files despite of assembler startup file. Is there a header file with memory mapped registers which does not include any other header files ...
2
votes
1answer
1k views

Can this SDRAM be used with STM32F7?

I have STM32F7 (which has a Flexible Memory Controller capable of interfacing SDRAMs) and I want someone to check if it is able to interface this SDRAM - IS42S32800D (http://www.farnell.com/datasheets/...
0
votes
1answer
2k views

STM32F7 Discovery Board STemWin examples

I've tried compiling the included ticker example with the STemWin_HelloWorld project included in STM32CubeF7. Functionally, it works OK but the draws seem to be corrupted. Take a look at the video I'...
2
votes
1answer
4k views

Which camera module will interface with STM32F7 Disco board?

Which camera module will interface with STM32F7 Disco board? The connector on the board is a 30-pin FPC/FFC 0.5mm. Could the OV2640 be adapted for this?