Messages

1

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: April 23, 2017, 10:37:42 PM »

Hi electron libre,

did you make the right connections btw stm32f407DISCO and LCD, did you try a contrast trimmer on the LCD 20*4?

Cheers

2

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: March 09, 2017, 07:19:36 PM »

Finally got mine working!!

Thank you Norbim!

Thank you Xavier!

I hope to upload soon, on my website, some other info on how I built it.
I made my own "motherboard" pcb to host the stm32discovery board...
The total cost has been kept low! 

3

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: December 06, 2016, 11:40:06 AM »

Perfect,

I'll try it!

Salvo

4

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: December 06, 2016, 07:32:09 AM »

Hi Norbim,

many thanks for your kindly reply!
Can you confirm that I must Flash the bootloader at the adress 0×8000000 and the  firmware at the adress 0×8040000 ?

Best regrards,

Salvo

5

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: December 05, 2016, 01:45:41 PM »

Hi,
Here is the latest compiled fw.
Norbim

Hi,

I finally got my Discovery Board.

I'm doing my own "motherboard" pcb for the encoders, lcd and switchs...

How can I upload Your bootloader and firmware using the on-board USB connections?

I'm a newbie...
 

6

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 26, 2016, 04:21:41 PM »

Hi Norbim,

don't worry,  Tks for your reply.
I'm going to buy a Discovery to try your solution.
I'll keep you updated about the progress...

Regards, Salvo

7

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 25, 2016, 10:22:23 AM »

Hi,
sorry, I've digressed too much...
Yes, Norbim's solution is probably the best way for me... to get a working PFM2.

Tks again for your kindly help,

regards,

Salvo

8

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 25, 2016, 08:58:58 AM »

Hi,

fantastic, I've just dwnld the schematics! Thank you so much!

I meant with or without 32khz rtc xtal... as for CERB40 version one or two..

What I'm thinking is to use an lqfp64 to dip converter for the stm32f405 chip and put caps, resistors and xtal near it on a custom board... with the other components: dacs, opamps, conectors and so on.
What do you think, may be work?

Do you use stlink-v2 and the pins "P1" and "jump3" on the main PreenFM2 board to program (at least for the boot-loader) the preenF405 uC?

I made my own "singe side" pcb... to lower the cost for my projects (as I did with the version one of the PreenFM) so I want to try this way for your new project.

Best regards and tks again! 

Salvo

9

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 22, 2016, 11:57:11 PM »

To Xavier...

Hi,

I've downloaded and study your schematics...I can't find the one relative to your uC board (FPreen405)?
Does it is open-hardware or not?
What type of minimum system do you use? The one of the CERB40?
Is it possible to have the schematic?
I'm looking to redesign the pcb to embed the uC...or at least to use a smd chip to dip converter and some THT components for resistors, xtal and caps...

Thank a lot for your beautiful project!

Salvo

p.s. in attached "my" PreenFM modular version
 

10

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 22, 2016, 11:34:43 PM »

Hi,

thank you for the fw!
Can you please confirm, I can use an ordinary LCD 20*04... I read that you did some change on the display driver...
What about the audio quality of The Discovery DAC? Are you happy with it?

Tks again for your help!

Salvo

11

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 22, 2016, 10:23:43 AM »

Wonderful!

I'll try to begin with the old firmware...waiting for the (compiled) new one!

Many, many thanks!

12

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 21, 2016, 10:27:45 PM »

Thank you very much for your fast reply!
Your synth is fantastic!
Could you please compile them (boot and firmware) for me?
I don't have the necessary skill to do it now.. 

Regards!

13

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: September 21, 2016, 04:29:30 PM »

Hi,
I built a low budget PreenFM (first version) using home made pcb and a maple mini clone, with a cheap 2004 LCD bought fm ebay...It works quite well!
Now I want to start the PreenFM 2 project on a low budget! I don't have the skill to code and compile the firmware...
Your stm32f4 Discovery porting is the best choice for me..
The questions are:
1) Is it possible to use your compiled bin (boot and firmware) using an ordinary (not oled) lcd (20*04)?
2) Once I've uploaded your boot loader to the Discovery board, is it possible to use the official and updated compiled firmware without any change?
2) What about the audio out quality of the Discovery? Could you please post some audio demo?

Thank you very much for your kindly reply!

S. Rizzo