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question about DMA

Posted on May 04, 2014 at 16:44I have an ISR, in which a DMA transfer will take place when the ISR is running. Although DMA transfer does not occupy CPU's running time, but occupies the Data bus. So will the DMA's existence lengthen the ISR's execut...

GPIO configuration for LSE crystal (STM32F102RBT6)

Posted on November 28, 2011 at 20:11This should be an easy one for you... I'm a new STM32 user and I am unsure how to configure the GPIO for PC14-15 when using 32kHz crystal as the LSE.  Do both pins need to be configured as alternate function (PP ...

jmorton by Associate II
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  • 7 replies
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F429 I2C interface init

Posted on May 01, 2014 at 17:52 #include ''stm32f4xx_i2c.h'' #include ''stm32f4xx_rcc.h'' #include ''stm32f4xx_gpio.h'' void I2C1_Init(){ /* Enable Peripheral Clock for I2C1 */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); /* Enable Periph...

kostas by Associate II
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  • 9 replies
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STM32F3 Comparator

Posted on April 30, 2014 at 18:17 hello everyone I am a beginner in STM32F3 and I found a problem with the comparator. I have no compilation error but its not working. If anyone can help me I would be grateful here is the code: ...

rafik by Associate II
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  • 6 replies
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STM32F427 internal NOR flash driver and application

Posted on May 02, 2014 at 18:10Hi, I am trying to implement firmware update on STM32F427 based custom board. I found that the STM32F427 has 1MB internal NOR flash. Where do I get the driver for it? Also, can someone provide a sample code to access l...

hiharsh by Associate II
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  • 2 replies
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STM32F4 function call overhead

Posted on April 08, 2014 at 17:15Hello,I'm fairly new to the STM32 processors, but got to like them quickly. Currently working with the STM32F401RE on a NUCLEO board, I made an observation I can't explain. Maybe somebody else can (easily).I let the ...

PWM Help with Nucleo F401 - From Scratch

Posted on May 02, 2014 at 13:23I'm stuck on figuring out how to set a PWM output with the F4 Nucleo board.Could a kind and gentle soul please walk me through all of the code needed for a simple 10kHz 20% duty PWM on PA5, which is connected to LD2 on...

bsanborn by Associate
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  • 1 replies
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Ethernet coomn in stm32f407

Posted on April 30, 2014 at 15:34I want to communicate stm32f407(bare metal) with the PC using ethernet (TCP/IP) and send as well as recieved data....How to do this can ay body guide me....I have experinced in writing linux systems  but not with thi...

sanjib by Associate III
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