STM32 MCUs Products

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Forum Posts

1 second missing at reading RTC on STM32L151

Posted on March 03, 2016 at 17:09 Hello everyone, I am using the RTC on a stm32l151VC. I am using sleep modes in order so save battery life. As I need to tell the OS how long I have been sleeping (Systick is turned off) I save the time t...

STM32 discovery DMA with SPI

Posted on March 02, 2016 at 14:00 Hello everyone, I'm trying to initialize the DMA for SPI2 but DMA is not working for my code , I don't know the reason. Surely I can say that it's not working as the LED which is turned ON in ISR is not glowing....

How to find the right processor?

Posted on March 02, 2016 at 15:37My particularquestionis I need a processor that can quickly measure the analog voltage i.e., it has the fastest ADC or preferably more, which may be combined in one. I find STM32F303 with 4x 5MSPS ADC, but perhaps e...

berger by Associate II
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FMC SRAM - Initialization parameter

Posted on March 03, 2016 at 15:36 Hello ST-community, I am able to setup my external SRAM and access and test (memtest) its memory regions. It works! However, I do not know if my configurations are correct. It is hard for me to und...

Input resistors on 5V-tolerant I/O

Posted on February 25, 2016 at 16:07Hi, I'm quite confused about 5V-tolerant input pins of STM32F405. Referring to the manual, the picture ''Basic structure of a five-volt tolerant I/O port bit'' shows diodes that protect the port. In this configura...

stm32f407 EXTI interruption freeze

Posted on March 01, 2016 at 12:11Hi all,Trying to implement a basic external interruption on the stm32f407 discovery board, the microcontroller allways freeze after receiving external interrupt. After some test i discover interrupt cause a call to t...

STM32F103 64 pin package. Vref questions

Posted on March 02, 2016 at 18:12Folks, The 64 pin package of the STM32F103 has no Vref pins. I can't see any way, though, of switching between external and internal ref for *any* of the parts. I'm assuming that where there is no Vref pin, you can ...

DiBosco by Senior II
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SPI NSS configuration

Posted on July 02, 2014 at 15:16Hello, Please could someone post the details to manage the SPI NSS signal? The master drives it ''manually'' using a GPIO bit. I want to use the SPI as a full-duplex master (sending and receiving data simultaneously)....