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Forum Posts

SPI Clock Frequency

Posted on October 18, 2012 at 17:56Hi,I'm having a bit of trouble configuring the SPI2 clock frequency on an STM32F407VG, or perhaps I am confused as to how it works.Using a 25Mhz external oscillator, boosting up to system clock frequency of 168MHz....

bpentz by Associate II
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SPI Code Help

Posted on October 19, 2012 at 10:18Hello All,  I am using STM32Fs series and I am writing a code for SPI2 . I have to read and write from the slave device. I have to read the data when RX buffer is full and write data continuoulsy to another device....

STM32F4 Usart1 problem

Posted on October 18, 2012 at 11:01 Hi, Im using a STM32f405RG and i am trying to get a simple USART example to work. I load the following code to the mcu: #include ''stm32f4xx.h'' #include ''stm32f4xx_gpio.h'' #include ''st...

thommagn by Associate II
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how to get complementary output at timer CH1 and CH1N ?

Posted on October 16, 2012 at 18:50hello forum,    the processor is STM32F103    I have an H bridge for DC motor   I want complementary outputs of CH1 and CH1N  I setup the timer 1 as following     TIM_TimeBaseStructure.TIM_Prescaler = 0;   TIM_Tim...

Literal error in stm32f10x.h?

Posted on October 18, 2012 at 11:15In STM32F10x Standart Peripherals Library v3.5.0, stm32f10x.h, line 3616:&sharpdefine  DMA_CCR7_PSIZE            ,         ((uint16_t)0x0300)Not needed comma? #stm32f10x-spl #error

frequencies of STM32F4

Posted on October 17, 2012 at 11:48Hi everyone!I'm new to the world of microcontrollers, these days I'm doing my first espeienze with STM324 discovery, I'm reading the various manuals and trying out the various examples, but I can not understand how...

betuel by Associate II
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Disabling_SysTick timer

Posted on October 18, 2012 at 08:59Hi everybody. I used SysTick timer as a counter of time in my application throug using of interruption. I found ''SysTick_Config'' function in core_cm0.h file. This function load time to reload register and switch ...

SPI DMA and CRC

Posted on October 18, 2012 at 11:41I submit a problem with crc calculation in a spi communication with dma facilities:I receive on STm32F103 some spi frame (14 bytes with CRC included) with the attached code.At reception of the frame, the crc calcul...

32kHz resonator with 12.5 pF - what will happen ?

Posted on October 17, 2012 at 11:38Due to an error in manufacturing we have a lot of modules with a 32khz resonator with 12.5 pF for low speed external clock and two 27pF aditional capacitor to ground. Prozessor is the STM32F103RCT6. The real time ...

colsman by Associate II
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  • 4 replies
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STM32F1x periodic external pulse counter

Posted on October 17, 2012 at 01:49Hi All,I’m using an STM32F103x.  I need to count the number of external pulses from a hardware detector, and take a snap shot of the pulse count at a precise frequency of 100,000 kHz.My current setup uses TIM5 CH...

cameron by Associate II
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  • 5 replies
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