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Forum Posts

How the UART works ?

Posted on August 18, 2014 at 16:20Hello,I'm discovering the STM32F407 with an STM32F4Discovery, in the past, I worked with a PIC32, and I see that there is many differences between those two microcontrollers.I want to understand how the UART periphe...

stm32f3 and stm32f4 library functions

Posted on August 18, 2014 at 16:17So this maybe a very stupid and noob question: Are the library functions of stm32f4 and stm32f3 the same? I have been working on stm32f4 for quiet a while and had written a large amount of code for a certain project...

furqan by Associate II
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Calculating crosstalk on I2C and SPI bus

Posted on August 18, 2014 at 13:33Hello,How to find out what are the frequencies possible on I2C,SPI,UART buses of STM32F051xx? How to calculate the cross talk coefficient of these buses if the tracks corresponding to them are .2mm wide and are .3mm...

sandhya by Associate II
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STM32F4 Discovery not working out of the box.

Posted on July 23, 2012 at 19:53I got 2 new STM32F4 Discovery boards and both are not being recognized by STLINK utility. Here some of the observations. I compared the behavior to STM32F1 discovery board. (It is Windows 7 PC).1) Plug in STM32F1 boar...

bsp0524 by Associate II
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STM32F4Discovery RTC WakeUp Interrupt

Posted on August 17, 2014 at 15:34 Hello,I'm currently quiet frustratedI'm trying to set up with the RTC wakeUp register an interrupt of 128Hz. For the RTC the LSI is used (I know not very precisely but for current testing propuse its enough)here i...

SRAM_DataMemory Issue

Posted on August 13, 2014 at 10:55Hi, I am unable to run the example STM32F10x_StdPeriph_Lib_V3.5.0\Project\STM32F10x_StdPeriph_Examples\FSMC\SRAM_DataMemory on my STM3210E-EVAL Board. Although I have made the following settings Project->Options ...

Simple Question on Ethernet Boundary Addresses

Posted on August 18, 2014 at 08:50In the STM32F407xx Datasheet (Doc ID 022152 Rev 4) Table 10 ''STM32F40x register boundary addresses'', there are 5 base addresses listed for the Peripheral ETHERNET MAC. How do these base addresses correspond to th...

wjthomas by Associate
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STemWin and Cursor Invalidation

Posted on August 18, 2014 at 07:41Hi,I have a problem with touchscreen cursor:When I move my finger on the touchscreen, although the cursor follows me, it remains its trace on the LCD. As if I'm drawing something, like in a Paint program. My deducti...

Encoder configuration giving erroneous speed

Posted on August 16, 2014 at 13:49Hi, I am trying to measure the rpm of a geared DC motor. The manufacturer claims a speed of 500rpm at 12V but my calculations give a speed of around 1600rpm! The gear ratio is 19:1. I have written the following code...

furqan by Associate II
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LTDC_ColorKeying help (STM32F4 Discovery)

Posted on August 17, 2014 at 18:36Dear friends. I try to learn how to work with LCD using the peripheral example - LTDC_ColorKeying. What documentation should I read to understand how to work with the LCD? I tried to follow the code but have lost (s...

baev_al by Associate II
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