Ask questions, find answers, and share insights on STM32 products and their technical features.
Posted on November 20, 2012 at 19:36hello forum I am trying to compile a C program for STM32F4 microcontroller with Eclipse + yagarto compiler I get the error; undefined reference to `_impure_ptr' there is no function ''impure_ptr'' in whole pr...
Posted on November 20, 2012 at 18:31Hello,I've spent several days working on getting the DCMI interface on my custom STM32F147 board working. I'm able to configure my camera sensor (OV7725) via I2C and I'm also getting the VSYNC signals from the sen...
Posted on October 30, 2012 at 09:46Hi, I see in the DSP section of the Firmware for the F4, at the following location \STM32F4xx_DSP_StdPeriph_Lib_V1.0.1\Libraries\CMSIS\DSP_Lib\Source\ControllerFunctions that there is reference to hardware and sof...
Posted on November 20, 2012 at 10:35Hi, I would like to know if there is any collision when the CPU needs to access to a address that is used by the DMA controller. For example, when an event occurs the DMA should transfer 5KB from memory to USART, ...
Posted on November 20, 2012 at 01:31Is there is anyway that the OTG can be implemented as COM ? #duplicate-thread?
Posted on November 19, 2012 at 10:06What is the main difference between MII and RMII #lmgtfy
Posted on November 18, 2012 at 08:16 Hi, I try to use IRQ to read data from MPU 6050, but eventI2C_EVENT_MASTER_BYTE_RECEIVED is never trigered. The interrupt code looks like following void I2C1_EV_IRQHandler( void ) { volatile stat...
Posted on November 19, 2012 at 20:20Experiencing a 500Hz 60mVpp on the ADC input. The noise goes away when the processor is in standby or processor is not programmed, but still is biased on. They may be a redundant question from previous posts, but ...
Posted on June 22, 2012 at 17:47I have recently downloaded the latest USB libraries which include a virtual comms port project. However all the examples use the ''Eval'' boards which include an LCD etc. rather than the Discovery board which does not...
Posted on November 16, 2012 at 14:37In the reference manual at paragraph 9.3.2 (pg 215) is described that the base address for the transfert is stored in DMA_SxPAR o DMA_SxM0AR register. Then in paragraph 9.3.7 (pg 221) is described the possibility ...
