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Messages - norbim1

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1
PreenFM2 / Re: PreenFM2 SMD version
« on: November 23, 2017, 03:09:57 PM »
Hi,
My fork on STM32F4Discovery uses 48k sampling rate with overclocked firmware. It runs without problem, since the I2S DMA also spares some CPU load. See my fork on Github. Actually the F4Discovery uses CS43L22 dac chip, but the I2S code part could be reused for PCM5102 too.

http://ixox.fr/forum/index.php?topic=63425.msg64969#msg64969

2
PreenFM2 / Re: Stm32F4Discovery port
« on: May 12, 2017, 02:04:39 PM »
Hi electron libre,

Hi,
I think it can be a problem with the USB stick or the power line to it ....

by further analyzing the code I realized that the USB_FS_Core is responsible for the computer connection side, so You should check the PC USB connection instead. It can also be a USB power issue.

3
PreenFM2 / Re: Stm32F4Discovery port
« on: May 11, 2017, 12:24:53 PM »
Hi Xavier!

Thanks for the tip. I just checked the symbol list, and found, that at 08041AC0 there is the OTG_FS IRQ handler, and thought that the 0x28041AC0 dumped PC value can be the same with a memory mapping offset. I'll try to find it with gdb, though I only used it before to debug a connected target.

4
PreenFM2 / Re: Stm32F4Discovery port
« on: May 10, 2017, 08:06:59 PM »
Hi,
I think it can be a problem with the USB stick or the power line to it (the PC number shows that it hangs on the USB OTG_FS IRQ handler). Check the USB stick, or the lines going to it. If all goes well, try to filter the power lines near the USB stick socket.

5
PreenFM2 / Re: Stm32F4Discovery port
« on: May 09, 2017, 06:27:20 PM »
Let's try with latest firmware. The only drawback is that in the mean time I changed my encoders, so with this they work with reverse turn direction. Either change your encoder A-B pins connections or let me know and I'll build a new .bin in a few days.

6
PreenFM2 / Re: Stm32F4Discovery port
« on: April 24, 2017, 09:37:19 AM »
Hi,
AFAIK it wont work without USB stick. 5. question in FAQ: http://ixox.fr/forum/index.php?topic=63377.0

Norbim

7
PreenFM2 / Re: Stm32F4Discovery port
« on: April 06, 2017, 04:08:32 PM »
Hi, for the first time flashing:

[/quote]
Use the STM32 ST-LINK utility via the mini USB on the debugger side of the board.

http://www.st.com/content/st_com/en/products/embedded-software/development-tool-software/stsw-link004.html

Norbim

It should be STM32F407 on the board. Heere you can check the correct Discovery version:

first check the original STMicroelectronics product page to know the orginal version:
http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-discovery-kits/stm32f4discovery.html
I bought all my Discovery boards from Farnell (farnell.com). The part number is STM32F407G-DISC1.


8
PreenFM2 / Re: Stm32F4Discovery port
« on: December 06, 2016, 08:49:02 AM »
Yes, it should work this way.

Norbim

9
PreenFM2 / Re: Stm32F4Discovery port
« on: December 05, 2016, 05:26:56 PM »
Use the STM32 ST-LINK utility via the mini USB on the debugger side of the board.

http://www.st.com/content/st_com/en/products/embedded-software/development-tool-software/stsw-link004.html

Norbim

10
PreenFM2 / Re: Stm32F4Discovery port
« on: October 04, 2016, 12:47:21 PM »
Hi Thierry,
first check the original STMicroelectronics product page to know the orginal version:
http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-discovery-kits/stm32f4discovery.html
I bought all my Discovery boards from Farnell (farnell.com). The part number is STM32F407G-DISC1.

11
PreenFM2 / Re: Stm32F4Discovery port
« on: October 01, 2016, 12:12:07 PM »
Hi Thierry,

yes there is no hardware volume control, but I implemented midi CC 7, so you can control it via midi.
The knobs are form MidiBox forum group buy. AFAIK last batch was a year ago:
http://midibox.org/forums/topic/19657-albs-waldorf-knobs-bulk-order-2015-2016/

12
PreenFM2 / Re: Stm32F4Discovery port
« on: September 25, 2016, 06:17:30 PM »
Hi Salvo,

Sorry for the late answer. I'm sure any standard 20*4 LCD works with my code. At first my OLED didn't work properly, so I made some timing change to better follow the datasheet. Later it turned out, that the problem was with the supply voltage instead.
I'm really happy with the audio quality of the Discovery. In one of my projects I use an external I2S board with a Discovery, because I need audio input too. The onboard codec have way less noise than the external one. I think STMicro made a really good job with the F4Discovery board.

Thank You Thierry, I use this box design for my other small projects too. The wooden sides are made from bamboo cutting board.

Regards Norbim

13
PreenFM2 / Re: Stm32F4Discovery port
« on: September 22, 2016, 08:21:41 PM »
Hi,
Here is the latest compiled fw.
Norbim

14
PreenFM2 / Re: Screen Issue - what I am doing wrong?
« on: August 16, 2016, 10:06:48 AM »
Hi,
in my f4discovery port i'm using Raystrar oled display, at first it had similar strange behavior and the probelm was that the oled was supplyed with 5V power while the driving data lines provides only about 3V high level due to the direct connection to the stm ports. The 3V is way below the datasheet specified input high level which is 0.9VDD (same as in Newhaven oled datasheet). My solution was to lower the 5V power to the oled by a diode, but i'm sure the resistor which was suggested in the oled noise eliminating topic can also be a good solution. Hope this helps.

Norbim

15
PreenFM2 / Re: New firmware 2.02 (October 14th)
« on: October 15, 2015, 08:32:49 PM »
Cool! Push to Git please. I can't wait to try it.

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