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STM32L151 bricked after attempting USB

Posted on August 14, 2014 at 14:13I have about 5 different projects using STM32 F series and 2 using STM32L151 on custom board.   I use the ST-link V2 to program and debug them.I was attempting to get a custom board with USB port working.  I loaded ...

Interference of DAC output and the PWM

Posted on August 13, 2014 at 07:21Hello,         I am generating a signal which goes to output of the DAC, but unfortunately when I use the PWM module of the system the PWM signal frequency distorts the signal generated by the DAC.Can anyone tell me...

False Framing Errors?

Posted on August 03, 2014 at 23:35I am using an STM32F407 to receive data via UART and seem to be getting false FE interrupts. There are two reasons why I believe that they are false: I have looked at the timing on an oscilloscope and it appears t...

dibs by Associate II
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i2c dma transmit/receive multiple bytes

Posted on August 13, 2014 at 17:46I am trying to transmit multiple bytes on I2C bus using dma. In the sample code I am trying to send 3 bytes. I see on my scope that three bytes are being sent but the problem is that the first byte gets sent three t...

abhinav by Associate II
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STM32F103 Keil USB-CDC hangs up

Posted on August 13, 2014 at 13:50Hi guys,Keil example USB-CDC stuck under load.I just can’t believe such a basic example is unreliable.I’m sure Keil USBstack is widely used in production so I guess I do something wrong.Could you point me what is wr...

anpilog by Associate
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Unable to enter Standby mode on STM32F030

Posted on August 06, 2014 at 16:35Hello,I have a board equipped with a STM32F030R8T6. It runs for app. 0.1 s and then goes into StandBy (or should) for 10 seconds. It is woken up by IWDG. It looks like it is working OK,  it executes and goes to _som...

h23 by Associate II
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DMA Interrupt is not pre-empting USB interrupt

Posted on August 13, 2014 at 02:22 I am having some trouble getting the expected behavior out of my interrupts for DMA and USB. Using the STCubeMX HAL libraries, I have configured the interrupts as follows: /** * @brief System ...