Ask questions, find answers, and share insights on STM32 products and their technical features.
Posted on January 02, 2013 at 12:00Hi All,is this normal ? Using 103F along with ST USB CDC Libs on my board and it seems that the USB driver on the PC negotiates a new COM port for every new board i connect to the PC.Normally this is not a problem ...
Posted on January 03, 2013 at 05:56Hi, I have an STM32F4 discovery board and I want to access SD card via SPI. The reason why I want to access Sd card via SPI is that the breakout module that I have has an SPI interface. I have looked on the interne...
Posted on January 02, 2013 at 15:55Hi, is there any possibility to change the polarity TX and RX of USART5? I.e. normally idle state is high, startbit is low. We need (due to bad specs of a foreign device) the opposite polarity (software only soluti...
Posted on November 05, 2012 at 15:06Hello, I read stm documentation on how to enter a microcontroller into dfu mode Iam using stm32f105, and below are the steps that i did 1- Boot0=1, Boot1= 0 2-PD6 = PA10 = PB5 = 0 3- make reset 4- connect the boar...
Posted on January 03, 2013 at 11:46Hi <3 Happy New Year 2013 <3 I want to implement PLL (Phase-locked loop) in STM32F4 Descovery Card The Goal is to control output system frequency to be equal to the input frequency., to eliminate the noise eff...
Posted on January 02, 2013 at 15:29Hello experts, I'm using stm32f4 discovery board. I have connected an interrupt line from a RTC chip to PA1 of my board. The RTC chip gives interrupt signals each 1 second. The way I enable interrupts is as follows...
Posted on November 02, 2012 at 08:09In STM32F4xx.H the bits DBGMCU_APB2... are erroneously named DBGMCU_APB1... - just info.
Posted on January 03, 2013 at 05:55Hi, I have an STM32F4 discovery board and I want to access SD card via SPI. The reason why I want to access Sd card via SPI is that the breakout module that I have has an SPI interface. I have looked on the interne...
Posted on January 02, 2013 at 23:09Hi all,I have a strange behaviour with 4 stm32f407 boards related to the jtag. The jtag of the stm32f4 is connected to a FTDI4232 chip. I have connected only the JTCK (with a 10k pd), the JTDI (with a 10k pu), the ...
Posted on September 20, 2012 at 11:44Hello, We want to use PB3 of the microC. As found in some forums we have to disable JTAG. We do this using following line of code: GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); Then we want to use P...
