About hashtala

hashtala · 2020-11-27

HelloI am basically designing an interrupter for plasma arc speaker. I have a small signal amplifier which I connect to STM32F746 and perform FFT to determine which note was played. Whole process takes about 2ms. My transformer works with 25khz. I wa...

hashtala · 2020-10-09

Hello I have DMA ADC and store data in uint16_t bufferI need to copy these values to input buffer to arm_rfft_fast_f32 function;the function should also cast ushort to float void copy_adc_to_input(uint16_t * int_buff, float32_t * float_buff, uint16_t...

hashtala · 2020-08-31

So I fired up CUBEstarted ADC over DMA with circular mode and Half Word to memory then I added Continuous DMA requests and set TIM5 as trigger sourceI then set up timerADC is 12 bitsthen I started everything and this happenedhowever I do not understa...

hashtala · 2020-08-29

Hello I am trying to perform FFT on real data sampled with ADC However, first I need to perform it on test data that I generated inside my code to verify it would workI set parameters: frequency, buffer size, sampling rate (buffsize 512)then I gener...

hashtala · 2020-08-28

HelloWhen debugging, I obviously use ST-Link and Keil displays register values for meCan I export these values somehow without having to transmit them over UART?I need these values for later graphing in python and UART would just take unnecessary scr...

hashtala · 2020-11-28

Thanks Jan. That clarified everything.if somebody find this question additionally I would like to add that you have to got and look datasheet up to see interconnecting triggers.it should look like this. Then you know which timer can be slave and whic...

hashtala · 2020-10-09

turns out this fft function modifies input buffer as well. That was the reason why I could not recognize what I was seeing.At this stage I am witnessing rather strange thing. my adc is 12 bits resolution but values are in 16 bit for some reason. I us...

hashtala · 2020-09-09

Thanks AmelI got it up and running smoothly but do not remember how exactly I solved it I think I just added definition of __FPU_PRESENT somewhere in my code insteadThanks for the solution

hashtala · 2020-08-31

well that's actually what is must be.since adc has 12 bits I though I would store them into uint16 but HAL complained since HAL_ADC_START_DMA actually expects 32 bits unsigned integerso am I getting 1024 values instead of 512 ? but since sampling rat...

hashtala · 2020-08-31

I left alignment thing as default as I have always beenI will try to mess with that

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How to PWM with repetition with STM32 timers

how to properly cast ushort to float in Cortex M4 MCU

ADC + DMA over TIM trigger = Weird Values ???

CMSIS DSP arm_rfft_q15 troubleshooting

exporting Keil debugger values from registers to PC without UART

Re: How to PWM with repetition with STM32 timers

Re: how to properly cast ushort to float in Cortex M4 MCU

Re: STM32F767 + CMSIS DSP + Keil = Error.

Re: ADC + DMA over TIM trigger = Weird Values ???

Re: ADC + DMA over TIM trigger = Weird Values ???