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F4 RTC prescalers computation

Hello,On STM32F429, I'm using RTC. It is clocked by the 32KHz LSI.I set async prescaler register to 127 and Sync prescaler register to 249.The total prescaling factor will be 250*128 = 32 000.Exactly what I need to provide 1Hz to RTC.After testing, i...

JulienD by Senior
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Resolved! IAR "download and debug" reset registers ?

Hello,I am using a Bootloader which jump to operational application.the Bootloader configures SRAM, so that operational does not need to do it again.Bootloader is baremetal , and operational is freeRTOS.I use IAR.Everything works well if I reset the ...

ranran by Senior II
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  • 1 replies
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CAN working on STM32F446RET6U but not on STM32F446RET6

I made several custom PCBs using the STM32F446RET6 chip. At first the CAN seemed to work fine, by reading it out with a Kvaser (CAN sniffer). However problems arrived when attaching other devices (like a beagle bone) to the CANbus. The beagle bone on...

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MScho.4 by Associate
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Multi channel ADC conversion with DMA and Interrupt.

hello everyone,i am new to STM32 controller series,i am trying to read mutli channel ADC with help of DMA and Interrupt.but facing issue.i am not getting ok status from"HAL_ADC_Start_DMA" this function. can any-body help me out.please find below con...

vshah by Associate II
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STM32H7 FMC setup for FT232H connection

I am trying to figure out how the FMC of an STM32H7 needs to be configured to work with an FT232H in CPU FIFO mode.The FT232H requires that for a write operation the NWE signal goes low after the data pins are set:From what I could find in the refere...

Alex A by Associate
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  • 1 replies
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Malloc to SD-Ram

I am using a STM32 Discovery Board with external SD Ram. I used the memory in RAM so far by creating a Ponter in the SD-Ram address area.But now my program is getting more and more complex and I could use a memory manager. Can I use the Malloc, Callo...

MMett by Associate III
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  • 2 replies
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STM32F4 USB hid host - non boot protocol

Posted on September 17, 2013 at 00:48 Dear All, Although this is my first post here, I am quite often reading my.st.com forum, when I need to find solution for my problems. Unfortunatley, this time I could not find the answer in existing threads for...