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Forum Posts

SPI raise/fall time

Posted on February 10, 2014 at 10:39HiI'm using STM32F373x SPI in slave mode. I get errors in about 0.1% bits transmitted, occurs in 50% of units from first production series of custom board. SPI lines have RC filter installed to improve EMC immunit...

bpacan by Associate II
  • 8416 Views
  • 11 replies
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Default Interrupt priority levels and no of levels?

Posted on November 07, 2013 at 12:13Hi, I if will be great if some one clarify me the following, * What is the default interrupt priorities? When I read using either      priority4 = NVIC_GetPriority(UART4_IRQn); orpriority4 = NVIC->IP[EXTI4_IRQn];...

jonfs2000 by Associate II
  • 4670 Views
  • 3 replies
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RTC alarm handler does not want to work

Posted on February 13, 2014 at 09:34Good day,Like topic said, the alarm handler does not to work, but if I do like this:while (!RTC_GetITStatus(RTC_IT_ALRA));printf(''\nALARM''); //it worksHere is my code: int main(void){  NVIC_InitTypeDef  NVIC_Ini...

hitsumen by Associate II
  • 3146 Views
  • 6 replies
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f407 board with examples

Posted on March 15, 2013 at 08:39Hi! The Discovery board based on f407 served me as a starting point in preparing a course on the use of microprocessors for local students, which do not have much experience with hardware, but are familiar with the p...

dusan2 by Associate III
  • 2155 Views
  • 3 replies
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Bug in CAN_TransmitStatus function?

Posted on June 10, 2013 at 23:31I noticed something strange with the CAN_TransmitStatus function in the stm32f10x_can.c (V3.1.2) peripheral driver code. Most of the time it works fine but occasionally it returns the wrong status. The root cause is i...

raymartin by Associate II
  • 1251 Views
  • 1 replies
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TIMER2 INPUT CAPTURE

Posted on February 05, 2014 at 13:42Hi,Kit using : STM32Discovery Board(STM32F100 controller)I have implemented the input capture mechanism for Timer15 channel 1. In which I set triggering for both falling and rising edge.Now I am trying to port the...

sooraj by Associate
  • 1145 Views
  • 2 replies
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ST Link V2, SWO speed weirdness

Posted on February 13, 2014 at 05:38I have a bit of code to output some debug using SWOvoid swo_init(){ uint32_t SWOSpeed = SWO_SPEED; uint32_t SWOPrescaler = (SystemCoreClock / SWOSpeed) - 1; // SWOSpeed in Hz CoreDebug->DEMCR = CoreDebug_DEMCR_TRC...

usb otg host lib, where is NAK for bulk-IN?

Posted on February 13, 2014 at 05:31I am using a STM32F405RG as a USB host. I've implemented the ST USB Host library (version 2.1.0) in a way that supports multiple devices behind a hub. In order to seemingly support unlimited devices (as much as po...

Problem connecting to STM32F051 via STM32F0DISCOVERY

Posted on February 09, 2014 at 16:57Hi, I have a problem connecting to a STM32F051K6. I tried to use the Debugger on an STM32F0DISCOVERY-Board. It should be an ST-Link V2. Therefore I disconnected the Jumpers on CN2 and the Soldering bridges on SB19...

j_ by Associate II
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  • 4 replies
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STM32F0308-DISCOVERY I2C Configuration

Posted on February 12, 2014 at 20:22My original post *poof* gone..I am attempting to use I2C2, however Oscilliscope does not see any activity on either SCL or SDA. Using STM32F0308-Discovery. Obviously timing parameter is wrong, have tried many as I...

vendor by Associate II
  • 1182 Views
  • 2 replies
  • 0 kudos