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New possibilities for the ultra-low power segment!

STM32U0 is the first Cortex-M0+ with a static consumption of only 160 nA in standby mode with RTC (Real-Time Clock) and 16 nA in shutdown. It also achieves 118 points in CoreMark and targets SESIP level 3 and PSA level 1 focusing on firmware code pro...

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measuring of execution time

Posted on October 28, 2012 at 20:05Hi everybody. Is it possible to measure execution time of program when I debug the program by using of hardware debugger ST-LINK V/2? I use uVision 4 studio (lite version) by KEIL and discovery board for STM32f0 wi...

Timer Interrupt frequency influenced by WFE

Posted on October 29, 2012 at 02:03Dear readers, the attached program for the STM32F407VGT6 (on the STM32F4 Discovery) should generate an interrupt every 500ms. The ISR toggles GPIO pin D14, which lets the LED (red) connected to it blink with 1Hz. T...

STM32F107RCT6 (LQFP64) - JTAG Help!

Posted on October 27, 2012 at 19:35Hey Guys: Please take it easy on me, I am a rookie STM32 user. I've recently ''adopted'' a new project from my employer due to the old engineer leaving the company abruptly.   I've been tasked with flashing several...

i2c start doesn't do anything on the bus

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 ...

saccrue by Associate II
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delay function and execution time

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...

orn by Associate II
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Problems with PWM

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...

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SPI1 initialization on STM32F405RG

Posted on October 27, 2012 at 16:52Hi all,I try too setup an SPI1 com with my STM32F405RG. The datashhet of the component says :SPI Operational Features 1. Data is delivered MSB first and LSB last 2. Data is latched on the rising edge of SCLK 3. Dat...

neoirto by Associate II
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STM32F4Discovery I2C Example

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