Ask questions, find answers, and share insights on STM32 products and their technical features.
Posted on October 28, 2012 at 17:18 I am trying to write an i2c driver for my stm32f100 discovery board. To verify that it is setup right, I want to send a start condition and check to see that the SDA line goes low while SCL stays high. I have ...
Posted on October 25, 2012 at 09:18 Hi, I wanted to create a delay function, and I thought of something classic like this: whlile(n_count){ n_count--; } but how do you know how long it loses precisely my function? I believe that ther...
Posted on October 27, 2012 at 20:36Dear STM-Experts, i tried my first PWM with the STM32F4Discovery. It should create a 7 MHz PWM with 50 % duty-cycle. But i can only get a changing 8 bzw 6 Mhz Pwm like shown here: Here is the code (Picked up and th...
Posted on October 26, 2012 at 14:24Hello everybody!Does anyone can give my working sample of connecting two stm32f4discovery via I2C?I've spent a lot of time, but nothing works.Thank you! #stm32f4discovery-i2c
Posted on June 15, 2012 at 19:06Hello Everyone, I've had issues a couple times getting my Real Time Clock to correctly alarm and wake up my processor. My most recent issue had me reading through many posts on this site to try to figure out my probl...
Posted on October 24, 2012 at 17:49I use an external 8.0 Mhz crystal connected to the HSE pins. I use STM32F2xx_Clock_Configuration_V1.1.0.xls utility with HSE_OSC setting to 8.0 MHz and HCLK setting to 120.0 MHz and let generate the file system_stm...
Posted on October 25, 2012 at 21:49Hello, I�m trying to use PA15 pin as an output on STM32F103CB chip, but with no luck. Because this pin is shared for JTAG, I must use remapping, First I enable clocks: RCC->APB2ENR |= RCC_APB2Periph_TIM1 | ...
Posted on October 25, 2012 at 16:17What is the best way to change the irqhandler to be used. I have a number of situations where the operations need to change depending on what the board is doing. Don't want to have a load of ifs or switches inside ...
Posted on October 25, 2012 at 16:25Hi. Erased state of flash memory in STM32L low-power devices is 0 instead of more common 1. What is the reason for this? If I will program unused flash portion to all FFh, will this impact current consumption in an...
Posted on October 25, 2012 at 14:38Where do I find out what DMA channel/stream i need to use for SPI1 TX.not sure which st document has this information in it?(stm32f4)Thanks :)
