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Forum Posts

DCMI to SRAM via DMA does not work

Posted on October 23, 2014 at 11:23 Hello, i have project where i need to capture image from MT9M001 camera, store it inside SRAM (2MB) and do some complex calculation on image. In order to make it work, i cropped image from 1280x1024 to 102...

STM32F2 Erasing Flash kicks out my Debugger (Raisonance R-Link)

Posted on April 03, 2015 at 08:26Hi thereI have a slightly irritating issue where I am erasing a block of flash memory and while erasing it always kicks my debugger out.  I get a ''Debugger has lost communication message''I am using an STM32F207VCT6...

grant by Associate III
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  • 3 replies
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datasheet not user friendly

Posted on April 03, 2015 at 15:09hello, i was happy to know ST was offering very broad controller series line at very cost. i was very disappointed and felt the heat when i started using its datasheets. though it gives bulk of information it's certa...

kumaresh by Associate II
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  • 4 replies
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what is mean of Dhrystone ?

Posted on April 03, 2015 at 19:23hi everyone what is mean of 1.25 DMIPS(Dhrystone 2.1) is it DMIPS equal to Dhrystone milion instruction per secod? if yes please explain for me how execute 1.25DMIPS with arm core and pipeline i read a manual of ar...

os1361 by Associate II
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Backup sram. Does the RTC have to also running

Posted on April 04, 2015 at 05:07Hi I want to save a Flag during a reboot on STM32F429IAt Main()I have  uint32_t bt; HAL_Init();  /* Configure the system clock to 180 Mhz */   SystemClock_Config();    __PWR_CLK_ENABLE();   HAL_PWR_EnableBkUpAccess...

brett23 by Associate II
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Trouble printing float number normally

Posted on April 03, 2015 at 21:15Attached is my modification of tiny_printf.c where I simply added float printing function (case 'f'). By default, the decimal points is 6. Below are floats I tried to print: Float                                    ...

chenping by Associate II
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  • 3 replies
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Trouble with UART Interrupt with IMU

Posted on April 02, 2015 at 19:59After extracting IMU from the demonstration project (merely leave out USB setting), now I face another issue is that whenever I tried to activate interrupt setting for UARTs, it hangs. (The circular LED_toggle indica...

chenping by Associate II
  • 1028 Views
  • 5 replies
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stm32f407 TIM1 and TIM8 sync

Posted on March 14, 2015 at 15:18 Hello I'm trying to synchronize TIM1 and TIM8 (slaves) via TIM2 (master).. I checked the manual and says it can be done (p. 554/1710).. Although TIM2 works fine, TIM1 and TIM8 are off.. Please check my co...

zarkscon by Associate II
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  • 24 replies
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STM32F103 SmartCard Question

Posted on April 03, 2015 at 01:34I am trying to create a smartcard driver on the STM32F103.  I am using USART3, and the ST8024CTR interface chip.My problem is that I can read the cards (with a hack of a workaround), but cannot write to them.  What i...

jwormsley by Associate III
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