Hi Danilo
I might add I modified the stock codec2 code quite extensively for the
F7...as you expected.
BTW .I NEVER use the STM32 HAL code for ANYTHING. NEVER I have no
idea really with the STDPeripheral library is.. I find if you write
everything yourself, you learn all about the chip
Hi Glen,
On 09.03.2018 09:44, glen english wrote:
> Agreed.
>
> skip the F4 and go straight to the F7 , unless cost is an issue.
>
Porting the software is an issue as well. F7 needs some more care (it
has real caches for code and data), unless you stick to GPIO, a lot of
higher complexity
Nice work Sebastien .
On 09/03/18 19:29, Sebastien F4GRX wrote:
Friends,
I am doing this RIGHT NOW:
https://github.cm/f4grx/hn70ap
The board prototype WORKS with a RTOS, NuttX. The Ethernet link works,
the radio chip initializes OK via SPI.
All we need is to continue this project.
I use the Si44xx parts in zero IF. works well !
But remember this is not a chip to connect to a real antenna ! it will
get overloaded quite easy
these chips make excellent IF chips.
On 10/03/2018 8:54 AM, Sebastien F4GRX wrote:
IIRC the si4463 has a zero IF mode at the price of some
IIRC the si4463 has a zero IF mode at the price of some reduced
sensitivity. I cant remember if it applies to FSK modes. Might be worth
looking at.
Also the IF can be changed to affect the rejection behaviour.
Sebastien
On 09/03/2018 22:37, Alan Beard wrote:
> *Hi Leon and all,*
> *
> *
> *I'm
Hi Leon and all,
I'm looking at the
Si4464/63/61/60 data sheet
https://www.silabs.com/documents/public/data-sheets/Si4464-63-61-60.pdf
On Page 8 we have "Image Rejection" at only 35db and 55db corrected.
Since their IF is only 468KHz, it's not possible to filter it our with the RF
front
Hi all,
I have about 90 pieces of stm32f405rgt which is the 64 pin device, I see it
is "compatible" with the stm32f722
Having worked a lot in the low volume/cost arm world, I have a pcb carrier
roughly 1x3 inches, it has the usb plug on it and the xtal, swd etc.
It helps you do extreme speed
You will have corrected the URL yourselves:
https://github.com/f4grx/hn70ap
Sebastien
Le 09/03/2018 à 09:59, Sebastien F4GRX a écrit :
>
> Friends,
>
>
> I am doing this RIGHT NOW:
>
> https://github.cm/f4grx/hn70ap
>
> The board prototype WORKS with a RTOS, NuttX. The Ethernet link works, the
Agreed.
skip the F4 and go straight to the F7 , unless cost is an issue.
CODEC2 was almost 1.7x the speed on the F7 compared to F4 for same clock .
The H7s are expensive, don't you think Danilo ? I am going RT1050 for
next design.. $5. k
On 9/03/2018 7:05 PM, Danilo Beuche wrote:
Hi
Hi all,
Just bear with me here,
My experience with some of the brandmeister guys has been less than
spectacular. There is no reason we cannot use "dmr framing" and use codec2
to transmit stuff, effectively splitting a dmr channel into 4 potential
codec2 slots.
I have revamped the adf7021 hotspot
Hi Alan,
>
> I ask, how far are we in being able to completely replace the firmware
> in the lowly MD-380 and clone radios? Or, could we beef up the power in
> the 7021, already used in the project!!
>
That (as in running Codec2 2400A) will never happen for technical reasons.
Using an SDR
Hi all,
I've put an post on the MMDVM email group asking them to
consider Lower BitRate modes and alternate Codecs.
Clearly the respondents thus far cannot Think Outside the Square.
One complained:
"Codec2 doesn't have a Network (in place)"
On the BitRate front they ALREADY have a lower
Hi Alan,
Yes that's a good description of how new modes are developed.
My current goals for FreeDV are:
(1) and (2): To complete development of FreeDV 700D, and FreeDV HD to
the point where they are integrated into the FreeDV GUI. This involves
C coding, and integration.
(3) I am also
13 matches
Mail list logo
