Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [stm32f4-discovery]

63 questions
12
votes
3 answers

STM32F4 How are Preemption Priorities and Sub-Priorities used?

I have started working with ARM-based microcontrollers. I not understand subpriority and preeemptionpriority. For example: NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; Why…
ziyad
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5
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2 answers

STM32F4 How to stop triple interleaved mode?

I am using triple interleaved mode with DMA in STM32F429 and have problem stopping it. It should be stopped by HAL_ADCEx_MultiModeStop_DMA(&hadc1), but while debugging it gives HAL_DMA_ERROR_NO_XFER error during HAL_DMA_Abort function. I suspect it…
ScienceSamovar
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5
votes
2 answers

DMA triggered by Timer using STM32F4-Discovery board

I am trying to trigger the DMA peripheral by the Timer using STM32F4-Discovery board, but it doesn't seem to work. I want to get the value of a port (Port C) every 5 ms and save the value in memory at certain address. When the timer (TIM5) overflows…
DragonflyN
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4
votes
3 answers

How to read from multiple channels of the ADC on an STM32F407?

I am working on a project wherein, I need to read the Analog outputs from 4 sources and convert them to a digital value using a single ADC module on the STM32F407 microcontroller. I want to sample the ADC values every 50ms and therefore have decided…
Shubham Rastogi
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4
votes
2 answers

Problems connecting ST-Link V2 and STM32F4 discovery board

I'm unable to connect to my STM32F4Discovery board using an ST-Link/v2. I've removed jumpers from CN3, connected the cables correctly but the utility tool won't detect anything... Using the ST-Link/v2 manual: PIN1 (VAPP) -> VDD PIN7 …
StjepanV
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3
votes
1 answer

how to enable FPU in cubemx

For STM32F407 Discovery board how do I enable its FPU from CubeMX? The following instruction is used in handwritten code. How can I get it generated from CubeMX? // Enable FPU SCB->CPACR |= 0xf00000;
ajeebx
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3
votes
2 answers

STM32F4 ADC: Dual interleaved + Independent

Some STM32F4 microcontrollers have 3 ADCs on board, they can be configured in various modes. I wonder is it possible to configure ADC1 and ADC2 in "Dual interleaved" mode, but have ADC3 configured as independent channel? When generating project in…
ScienceSamovar
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3
votes
2 answers

Read big file from sd card with fatfs

I'm using the STM32F4DISCOVERY board and I am trying to read a file from a micro SD card, and treat the data. I'm using the following functions int main(void) { int i = 0; HAL_Init(); /* Configure the system clock */ …
Armand Chocron
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3
votes
1 answer

Can´t erase data from flash memory (STM32)

I´m trying to save some data to flash memory on my STM32F407 board. Before I can save them, I need to erase a memory sector. I chose 16 Kbytes Sector1 starting with address 0x08004000 and chose Voltage range 2.1-2.7 V. I'm using HAL library. Program…
Jardo421
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2
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1 answer

STM32F429I Discovery board - unable to do printf() redirection using SWV/ITM

I am an STM32 newcomer. I recently got an STM32F429 Discovery dev board which I have been playing around with. Currently I'm trying to figure out how to use the debugging functions of this M4 Cortex, specifically the SWV ones. I used STM32CubeMX…
Blargian
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2
votes
2 answers

How to configure STM32F4s TIM1 and 8 for PWM

I have configured timer 4 for PWM with following code and connected LED to the configured pin. It is working. TIM_TimeBaseInitTypeDef TIM_BaseStruct; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); // Enable bus…
Terraviper-5
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2
votes
2 answers

Powering MCU from both USB or Battery

I am developing a board that will need both USB and battery power options, non switched. I put this schematic together that I think is right, but I want to make sure I'm not going to blow the chip. I'm using an STM32F405 100 pin. The nets in the…
TyrantUT
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2
votes
4 answers

STM32 Audio class USB not recognized as audio device

I'm learning about USB classes using STM32F429ZI(on Discovery board). I already tried to implement Communications device class (CDC) and it worked well, now I tried to do some simple test with Audio Device Class. I am using CubeMX to generate…
ScienceSamovar
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1
vote
3 answers

How to generate NACK on STM32F407

Is there a way to send a NACK on I2C on STM32F407? There is no way to do that using the HAL, and the datasheet says nothing about it.
andreahmed
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1
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0 answers

I2C get stuck on busy with DMA interrupt

I'm trying to interface with NXP device using I2C. I'm initializing it that way /* I2C3 init function */ static void MX_I2C3_Init(void) { hi2c3.Instance = I2C3; hi2c3.Init.ClockSpeed = 100000; hi2c3.Init.DutyCycle = I2C_DUTYCYCLE_2; …
andreahmed
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