STM32 MCUs Products

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Stm32f407igt6

Posted on July 22, 2014 at 12:31I have configured the clock for 168 mhz and for tim2 84 mhz , presaclar = 2 and arr = 200 it is showing 4.6 us in stm32f407vgt6...but in stm32f407igt6 it is showing 24 us .....I have checked the system_init actually i...

sanjib by Associate III
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F4 FPU interrupt vector

Posted on July 24, 2014 at 02:26STM32F4xxx Reference Manual, DM00031020 rev 6, has the �FPU� interrupt vector at position 81, address 0x00000184 (or 0x08000184 depending on how one views low ROM).  I found no documentation about what this vector is ...

picguy2 by Associate II
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  • 5 replies
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Double buffer DMA

Posted on July 24, 2014 at 22:55Hi,I am trying to develop an application for STM32L series. I need to use DMA in double buffer mode. I found information in the reference manual for a double buffer circular mode which uses a single DMA buffer with ha...

s7v7n92 by Associate II
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LCD shows wrong colors

Posted on July 20, 2014 at 19:52I'm using a 7'' 800x480 LCD, + SSD1963 driver.The combination is connected to an STM32F103ZET6, via FSMC.I have modified a header file to initialize ssd1963, things seem to work as expected, texts and fonts are OK, bu...

Why USART transmission depends on function calls order?

Posted on July 23, 2014 at 17:22 Hello, please help me to solve next problem. I have application, which consists of three main modules: io_init(), lcd_init() and usart_init() â€�?  io_init() configures button inputs and some outputs used for relays ...

orionhere by Associate II
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  • 8 replies
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Using structure causes Hardfault exception

Posted on July 23, 2014 at 23:49Hi everybody,I'm trying migrate a program from 28335 to stm32f407. I was using a structure to store some data, and passing the pointer to this structure to a function. Now I find that if I define the structure variabl...

yifan115 by Associate II
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  • 4 replies
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Use DAC of STM32F103RET6 to create meaningful sound.

Posted on July 14, 2014 at 12:47Hello Everyone , I am using STM32F103RETG to create a sound.I am also using elua and minicom to execute the program onto the uc. My plan is to - *first use the DAC wave generator to create a simple noise. I will be us...

Set GPIOs to high impedance

Posted on June 27, 2014 at 10:11Hopefully this is an easy question: To set up a GPIO to high impedance mode, I have to configure it as input? If I want something connected to ground at this pin, I can set it to an output with low level? What I actua...