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New possibilities for the ultra-low power segment!

STM32U0 is the first Cortex-M0+ with a static consumption of only 160 nA in standby mode with RTC (Real-Time Clock) and 16 nA in shutdown. It also achieves 118 points in CoreMark and targets SESIP level 3 and PSA level 1 focusing on firmware code pro...

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External interrupts question

Posted on August 07, 2016 at 18:23Hi.Currently I use PA15 pin as external interrupt. The ISR routine is common for lines 10 through 15 and it is called EXTI15_10_IRQHandler. Now, I would like to have another signal connected to pin PB12, which has s...

matic by Associate III
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STM32F042 Vrefint reading

Posted on June 21, 2016 at 13:55Hi everyone,I am working on a project and need to measure analog voltage on some channels. To do so I use CubeMx version 4.15.1, but the readings on channels are significantly different than the applied voltage (about...

RTC ALARM is not triggered! - STM32L152

Posted on August 15, 2016 at 07:22Hi,I am running a STM32L152 into stop mode. The MCU sleeps most of the time (waking up every 1hr to read sensors). As I have the watchdog running, I am using RTC to generate an alarm every 10s (watchdog period is ~2...

Saturation AHB bus

Posted on August 13, 2016 at 00:06Hi,I have a big problem where I seem to overload the AHB bus. The main components that are involved are SDRAM and LTDC. I am using one layer (at the same time) in svga resolution and the frame buffer is in SDRAM.Jus...

Synchronize internal DAC transfer to I2S DMA transfer

Posted on August 16, 2016 at 20:12Hi! I have a CS4344 DAC connected via I2S to my STM32F407, converting values at a rate of 44.1kHz. In parallel, I would like to convert values through the internal DAC, at the same rate, in a synchronized way (every...

florent2 by Associate II
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Noisy DAC on STM32F303

Posted on August 08, 2016 at 22:39Hi, I just set up DAC output on the STM32F303 Discovery Board and I'm noticing a lot of wideband noise on the output (about .5 volts peak to peak), even when I set it to a constant value within my program. Is there ...

epalaima by Associate II
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camera project without dma to LCD

Posted on August 12, 2016 at 01:40dear all,I have studied the camera sample project, it uses dma from camera address to LCD memory address. I do not have lcd in my design, so when i run the camera project, i see one whole black image. Is there a way...

Resolved! Calculating size of used RAM at run time

Posted on August 16, 2016 at 09:56Hi all,Is there a way to calculate the size of used RAM at running time. So that I can calculate how much RAM is still available for use. Actually I have to show used RAM in percentage to my product customer.

STM32F746; USBH_Start/Stop issue

Posted on August 16, 2016 at 13:29 Hello, I want to read/write files on a usb stick in my application and I already have generated a project with the help of ST32CubeMX for my Nucleo-F746ZG board. The configuration in CubeMX is: ...