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GPIO pin toggle speed?

Posted on June 03, 2013 at 13:36Anyone know the fastest possible frequency that any GPIO pin state can be toggled?

michael2 by • Associate II
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SPI1 on STM32F4Discovery

Posted on June 02, 2013 at 15:52Hi community, for a few days i try to use the SPI1 on the F4Discovery board. I use the PA5-PA7 pins on AF5. But after my init the code does nothing? What is wrong in my init function? #define Open_SPI_MISO_PIN        ...

dennis23 by • Associate II
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stm32F4discovery usb problem

Posted on June 01, 2013 at 17:05I have implemented the code of this linkhttp://www.st.com/web/en/catalog/tools/FM116/SC959/SS1532/PF252419 that allows sending and receiving a file from a flash drive via the usb stm .. but the problem is that an indi...

STM32F4 Discovery and Rn-41 Bluetooth module

Posted on June 02, 2013 at 23:56Hi, Iam completely new and lost, i want to interface a bluetooth module, I have found some examples but i cannot receive any data on hyperterminal when i run these codes. Actually i need help to find out from where i ...

problem with jtag tck pin

Posted on June 01, 2013 at 08:55hiI have a problem with jtag tck pin on my board.When I touch it with my finger  the st-link Works properly & connect to stm32f417 but if  i remove my finger from this pin the st-link not connect to my mcu.i pull-down...

m2399 by • Associate II
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SD card on STM3240

Posted on May 31, 2013 at 16:15Hello, I need some help with creating fat files on  microSD.I found some files on the demo builder but it only provied viewing directories.Many thanks.

bouhoula by • Associate II
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I2C Issues,STM32F440x and L3GD20

Posted on May 30, 2013 at 17:00  The original post was too long to process during our migration. Please click on the attachment to read the original post.

jonphenry by • Associate II
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AN3070 : Is DMA transfer complete interrupt needed?

Posted on May 27, 2013 at 05:31Application note AN3070 describes a procedure for releasing RS485 bus when using DMA to transfer USART data.   The procedure uses two interrupts:  * DMA transfer complete (DMA_TC) interrupt   * USART transfer complete ...

derek by • Associate II
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unable to get into bootloader on stm32f103

Posted on May 31, 2013 at 08:59Hi, i bought 2 chips STM32F103RET6 , i put them into boards, one chip is working normally , so it's possible to flash it via USART1, but second one is not reacting on USART1 for new flash, and i think that it's not ...

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