About JStoj.2

JStoj.2 · 2020-08-18

Hi,I am using 2 DMA transfers (DMA2) in the following configuration. The basic project is generated with cubeMX. Mostly clocking and USB parts are done in cubeMX, everything else is done "by hand".The first DMA2 transfer uses stream0 and is transferr...

JStoj.2 · 2020-05-25

Hello,I am trying to use the USB HS interface of the STM32F730Z8 but I can't get it to work. I am doing this on a PCB I designed.I am using the latest version of STM32CubeIDE and I configured the interface with the CubeMX integrated in the IDE. I sel...

JStoj.2 · 2020-08-19

1us delay (actually about 925.9 ns as I can't set the timer to a good value) seems to also work fine. My guess is that something is happening in the MCU that prevents the EXTI1 interrupt from being executed. But I don't know why the intentional delay...

JStoj.2 · 2020-08-19

A small intentional delay after comparison of the command seems to solve the problem:if(usbReceiveBuf[0] == 'M'){ HAL_Delay(1); measure = 1; }And now even the strcmp function that was used before is not causing any problems.I am at a loss wha...

JStoj.2 · 2020-08-19

So it looks like uVision automatically enabled FPU which I disabled now. But the major factor was strcmp() function. With this function removed I can now sometimes get the correct data. So the interrupt handler is triggered right on the edge and some...

JStoj.2 · 2020-08-19

But the problem is not the SPI. If I analyse the data with LA the data is still the same. The problem is the added delay before the EXTI1 interrupt handler executes so the SPI is enabled too late. Without the delay (without the measure command being ...

JStoj.2 · 2020-08-19

I found out that when I send my trigger over USB that introduces a delay somewhere that causes my EXTI interrupt handler to execute slower (too late). That causes the 1 bit shift. But If I sent every 500th (or 200th, 100th,... doesn't matter matter) ...

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STM32F730 DMA data shifted 1 bit

STM32F730Z8 USB HS interface not working

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