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Posted on May 29, 2015 at 14:49HelloWhat is the delay between interrupt occurance(e.g. external interrupt on a pin) and interrupt service routine entry?by some initial measurements, it's about 30 cpu clocks.Is it interrupt type(external pin, specifi...
Posted on May 29, 2015 at 12:36Hi,Having had a working USB VCP using the old non-cube drivers, I've spent the last week trying to get a reliable VCP with the new ones - and failing. In fact at one point just uncommenting some irrelevant and unused c...
Posted on May 28, 2015 at 01:41Hi, I want the debug ability during stop mode. According to the reference menu, DBG_STOP in register DBG_CR bit should be set to do this. But after I set it, it is still 0. I have tried several ways: Use a macro ''ex...
Posted on May 28, 2015 at 20:37Hi, I'm using an audiocodec conected to I2S2 of the uC. Tx on I2S2_SD and Rx on I2S2_extSD. I can send audio to the codec as a master and codec play the audio Ok. I'm using DMA and on DMA_Tx_Cplt IRQ I configure the ne...
Posted on May 28, 2015 at 18:53Hi,I just got my new STM32F4 discovery board, i wrote a LED test program with CoIDE and flashed it, but LED didn't toggle, even i try to press RESET button. Then i go to debug mode and click run, it starts to toggle. I...
Posted on May 28, 2015 at 18:18The original post was too long to process during our migration. Please click on the attachment to read the original post.
Posted on May 28, 2015 at 17:47When i developing custom USB device, I vent into trouble and at end I isolated a problem:First: USB device answer for this packet is ''Success'' Setup Packet Offset Field Size Value Description 0 bmRequestType 1 2...
Posted on May 27, 2015 at 23:22As you can see here:https://drive.google.com/file/d/0B979a_DgADKmNkE4N1B0R21BaXM/view?usp=sharingI'm trying to send data out USART2; it seems to be set up correctly and outputting to pin A14, but the voltage levels don...
Posted on July 19, 2011 at 17:47Hi, I am trying to produce PWM signal by using TIM17 channel1 on PORTB-9, but i can't get the PWM signal. In debug mode i can see that TIM17 COUNTER register advanced and do overloop, but i just cant see the PWM signa...
Posted on May 25, 2015 at 08:16I am using stm32f4 discovery board. from ADC I take 1ksample/sec and accumulate it. after accumulation of 30Ksamples, process it through band pass filter. output of band pass filter is very large +ve and -ve values ex...
