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External Voltage Reference? To get a most accurate ADC result

Posted on October 06, 2014 at 09:53Dear all,We are trying to use the on-chip ADC of STM32F407. We have read two appnotes, which are AN4073 How to improve ADC accuracy when using STM32F2xx andSTM32F4xx microcontrollers and AN2834 How to get the best ...

cyqdtc by Associate II
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  • 1 replies
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How can I return from sleep mode on stm32f401

Posted on October 03, 2014 at 14:28Hi, I'm facing with a strange problem, in fact I'm working on Discovery platform to study the stm32f4 low power modes. I'd like to enter and exit from sleep mode and to do this I use an UART to send the command to ...

DUrbano by Associate III
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  • 8 replies
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Cascaded Timer Causes Delay

Posted on October 03, 2014 at 16:14Using the STM32427, with TIM5 set up as a master to TIM1 and TIM8. This works fine; I get synchronous pulses like I expect. However, I'd also like to have TIM1 act as master for TIM4. When I enable TIM1 in master m...

jvavra by Associate III
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STM32F4 potentiometer and ADC

Posted on October 01, 2014 at 17:23 HI, I want to read the value of a potentiometer; I have this ADC: #include ''stm32f4xx_adc.h'' #include ''stm32f4xx_gpio.h'' #include ''stm32f4xx_rcc.h'' #include ''pwm2.h'' void adc_configur...

pano by Associate II
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STM32F4 tutorials?

Posted on October 02, 2014 at 19:55Hi everyone, So i wanted to get into ST ARMs microcontrolers. I only used TI Tivas before but i wanted to try out the ST ones.Well i would like to know if anyone could provide some links to tutorials and such. My m...

luis by Associate II
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  • 4 replies
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STM32F4 ADCs Can Achieve 2.4MSPS?

Posted on October 02, 2014 at 15:36Hi,I�m running a single ADC in continuous mode with fADC = 21MHz and expect it to provide 1.4MSPS. I seem to be getting only 0.55MSPS. Can anybody explain why this might be?According to the STM32F407xx Datasheet (D...

h239955 by Associate II
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Question about external RAM and SD

Posted on October 02, 2014 at 17:05Hello,I try to test my application with a new setup with external SRAM on the STM3240G kit, for heap and stack.I use FatFS on SDIO which needs DMA. When I read a file there is a problem.I know it is not possible to...

pcu by Associate II
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  • 3 replies
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STM32L152 rtc battery

Posted on October 03, 2014 at 01:48The STM32L152 is working. Also the external 32KHz is driving the rtc. If I connect a battery to VBAT pin the oscillator stops working if main power go down. There is also no current from battery to VBAT. In running...

peterd by Associate II
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  • 1 replies
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