Messages

1

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: May 09, 2017, 08:20:10 PM »

Hey norbim1

After sever tests, the STM is still freezing, either playing or idle. Is there something I can do to assist you?

Cheers

2

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: May 09, 2017, 02:40:16 PM »

Hello Norbim1,
After a small pause on this project I managed to get it running. I enjoy the clear FM sound and the very nice presets.

Now I have some stability issues. After a random Interval of time, from 10 to 60 secs the synth freezes. This only occurs with the 205 firmware, at least I do not remember to have it running the 106 version. The error code on the LCD is never the same. I play the sent by usb midi, USB powered. The usb voltage is about 4.5V. Is this an issue of the over clocked version?

Best regards, and thanks again for this great synth!

3

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: April 24, 2017, 02:25:37 AM »

Hello rsproduction, thanks for the reply

I wire the 4x20 LCD using the flowing schema:

pin 1 > GND
pin 2 > 5V
pin 3 > 10k pot, dividing a gnd/5V
pin 4 > PE8
pin 5 > GND
pin 6 > PE7
D0 to D3 > GND
D4 > PE9
D5 > PE11
D6 > PE13
D7 > PE15
And Backlight

The LCD Lights up, I can fix the contrast. All the charachers remain filled. Is there some step I am missing? Buttons combo, firmware activation. There is only the lsc attached, no buttons, encoders or USB memory.

My procedure of writing the bin files: first I upload the p2_boot_1.11.bin file at 0x08000000, after him the p2_205o.bin file at 0x08040000. I downloaded the files in earlier posts in this topic.

Correct me if I am wrong

Best regards

4

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: April 22, 2017, 04:15:48 PM »

Thanks for the reply, norbim1

The STM32f411 has a different configuration, it is not an updated f407.

I made test with the board from my MidiSeq, which is an F407. I flashed, using STlink, the two files : p2_boot_1.11.bin at 0x08000000 and the p2_205o.bin at 0x08040000.

I also made some experiments attaching lcd pannels - one 4x20 and one 2x40, just to see some reaction.

Is there some step I am missing? There is noting on the LCD, should I wire all the wires and usb stick also?

I attach 2 shots with the flash process:

Cheers

5

preenfm2 and preenfm3 / Re: Stm32F4Discovery port

« on: April 06, 2017, 03:35:44 PM »

Hey norbim1 and rsproduction.

Can you provide me a bit more info ow to burn the Disco board. Is there some DFU mode? Also, the I dispose is a STM32f411.

Cheers