Posted on August 07, 2015 at 15:21We are trying to design a circuit which may need to work at -55 degree. And our current design is with stm32, which is very powerful.Here comes my questions:1. Does stm32f4 series have -55 degree (temperature) versi...
Posted on January 12, 2015 at 10:59
Hi all,
I am trying to trigger ADC2 with a timer at around 100kHz. The data will be loaded into DMA. However, the data obtained through DMA has a much higher frequency than the timer.
For the ADC1, I...
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 ...
Posted on August 04, 2014 at 12:22Dear all, We are using DMA connecting with an ADC though SPI in circular mode. ADC results will be loaded into array1[320] and arrary2[320].My question is sometimes I need to stop DMA transmission and restart it lat...
Posted on June 11, 2014 at 14:26I have an array of unsigned short numbers from sensors. The data will be multiplied with an array of floating point numbers.To use FPU provided by STM32F407, I need to convert the unsigned short numbers into floating ...
Posted on August 07, 2015 at 16:17Hi Syrine,The datasheet says that it can only work at -40 degree.Are there -55 degree versions?Or can we get MCUs working at -55 degree with screening(make them work at -55 degree and pick 6 from 10)?
Posted on April 08, 2015 at 12:46
Hey Clive,
You are using
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DM...
Posted on January 14, 2015 at 05:21Thanks for your reply Clive! I will try to describe the problem clearly. Much higher means:1. An update interrupt handler for timer 2 has been implemented. 2. If the trigger frequency for ADC is the timer update fr...
Posted on August 05, 2014 at 05:29Hi bs thanks for your reply.I just re-read the datasheet : http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00046011.pdfIt says on page 15:1. If the stream is enabled, disa...
