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Forum Posts

is it possible to see system clock from GPIO?

Posted on April 08, 2014 at 13:28Hi all, I'm working on stm32l MCU and wonder if it is possible to get the system clock waveform from GPIO output pin?  If yes, where could I find it from the datasheet?Thanks a lot,Shan

Writing Interrupt Handlers

Posted on December 13, 2012 at 13:00Hi,I wonder if C compiler has to know that the given function is an interrupt handler. Looking at the sample code I see not pragmas or any other ways to tell compiler about it. From the other side as far as I coul...

dimax by Senior
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Timer 2 Frequency

Posted on April 08, 2014 at 15:48Hello everyone, I am trying to Set up timer with 1ms Tick value and it does not seems to be working correctly.  TIM_TimeBaseStructure.TIM_Period = TIMER_MAIN_1MS_VAL;   TIM_TimeBaseStructure.TIM_Prescaler = 2;  TIM_T...

dhiry2k1 by Associate II
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STM32F427/9 FSMC continuous clock mode

Posted on April 05, 2014 at 05:00I am working on porting a soft-core processor presently hosted in an FPGA application to an external processor. The application logic is memory mapped, so that the CPU can control the hardware using ordinary read/wri...

jshamlet by Associate
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Using MD5 Hash on stm32f417

Posted on April 03, 2014 at 13:08Hey guys,I'm trying to calculate a md5 hash on a string I've got and I'm calling the function:HASH_MD5((uint8_t *)buffer, size, Md5output);where size is the size of the buffer. But the Md5output is empty after execut...

EmberZNet Stack 4.3.0

Posted on April 10, 2013 at 13:22Is this EmberZNet Stack 4.3.0 file downloadable from ST website? I need this for setting up a mesh network on STM32W RF Control Kit. If someone of you have this file. please update somewhere on the web. Regards, ns ...

enes by Associate II
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Polarity PWM on STM32F4

Posted on April 08, 2014 at 16:03 Hello! I am trying to create two square PWMs (duty 50%) with a controlled phase shift (0° to 90°). I am currently using TIM4 with 2 channels set on TIM_OCMode_Toggle and it is working OK. The pro...

thoman92 by Associate
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I2C SDA, SCL held high

Posted on April 08, 2014 at 15:37 I m working on STM32F303. I have interfaced I2C2 to EEPROM and DS3231 with pullups on SDA and SCL..Issue: After Reset, SDA and SCL line is held high (it only happens ocassionally)..While I2C works properly, i can ac...