nicsure

nicFW900 V4.00.08

Here's the new "stepped" TX Power system. I have set the default power calibration that I hope will be reasonably accurate for most on the HAM bands.

Make sure the first you do is to write th...

How the new RT900 power system operates.

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RT900 Next TX Power System

Owing to the next level nastiness of the RT-900's TX circuitry it is next to impossible to have a nice ramp up of power like the H3 and 890 can do. You have to switch the PA Gain settings according...

nicFW900 V4.00.07

Hoping this fixes the "N/T" issue experienced by many. I managed to trace it to the older TX power calibration system. I had left a remnant of the older system in place that I was unaware of, and t...

I now have some idea what's going on

Multiple people are reporting a N/T issue after following the default load-out procedure. Now this is EXACTLY what I need people to do. It helps because I can be sure people are working from the SA...

Changes RT-900

It is important to understand that the RT-900 firmware is not finished, the releases I put out are development snapshots and subject to change. If you're following along on the RT-900 ride y...

Why there is no MacOS/Linux support (and likely never will be)

First and foremost, I don't have a Mac, and I never will have.

MacOS is the most tiresome, troublesome and expensive OS on the planet developer wise. Quite frankly, I don't need or want that ...

RT-900 Essential Setup Each Release

Must be done for every release.

nicFW RT-900 V4.00.06 B

Power output calibration system remains unchanged for this release. Next release will be different.

• This release implements a number of things and fixes "under the hood".

• ...
  2025-05-04 09:19:58 +0000 UTC View Post

RT-900 is not suitable for variable power output.

Sorry, we'll have to resort to Low/Med/High like the stock firmware. Not my fault, it's just badly designed.

The stock firmware uses the following strategy:

• For Low Power: PA_Ga...

  2025-04-30 21:10:34 +0000 UTC View Post

[Release] RT-900 nicFW900 4.00.05 B

• FM Tuner Implemented

• New TX Power Calibration System

Refer to the previous post's video for information on calibrating frequency ranges. A more detailed video...

Heads-up of coming TX Calibration system

Since this method is way more tricky and complex than previous solutions, I'd best get some info out about it before hand.

Next Power Tuning system RT-900

The output power of the RT-900 especially on UHF is all over the place. For that reason power tuning is going to have to take a different approach. You will have noticed the PA Gain 1 and PA Gain 2...

nicFW900 V4.00.04

Updates:

• Rotary encoder implemented

• VFO/MR & A/B buttons correctly assigned.

• Menu 5 & 6 now control the...

  2025-04-25 04:02:27 +0000 UTC View Post

V4.00.03X Experimental Power Control

This version is more of a diagnostic version. It gives FULL control of the PA and output power (Register 0x36 of the BK4819)

Menu 4 (TX Power) Controls the VBIAS 0 to 255 (0V to 3.3V)

M...

nicFW900 V4.00.02 Preview

Preview version, this is meant mainly for just browsing rather than actual use, but it is somewhat functional but it will be FULL of bugs and glitches. More functionality will be added as developme...

RT-900 Preview Flashing Process

Short tutorial on getting the RT-900 nicFW preview to "work".

Now somewhat functional.

Progress fellas. Visuals mostly sorted, underlying SPI flash, serial comms, BK4819 now operational. Hopefully be able to get a usable preview out soon.

RT-900 Code is Running (kinda)

My sincere apologies to all here for the time this is taking, but this radio is by far the hardest to code for yet. I seriously have less hair than I did when I started this.

Another progress...

RT-900 Port Progresses, skinning refinement continues.

Here's a preview of three different font sizing option skins. Using the 12 segment LED style font for this. Definitely got a lot more scope for skinning on this bigger display.

I now have 100...

RT-900 Port Progress

Hi all

Conversion is still ongoing, it's much tougher than the H3->890 port due to the differences between the M0 and M4, why on earth couldn't Radtel have just used a Cortex M4? Sometimes...

RT-900 First Skin Draft

As with previous nicFW releases for the H3 and 890, the 900 will also be skinnable. However, the 160x128 screen area gives more freedom than those other radios. I'm able to display the frequency FU...

RT-900 Flash Backup

In preparation for the eventual release of the RT-900 firmware, I would really advise everyone backs up their SPI flash memory.

Unlike the 890 where tools for doing this were already availabl...

nicFW890 V3.00.17

This is to address a bug in the SPI App when importing .nicfont files. They should import into the correct character slots now.

The firmware is still version .16 and need not be updated if yo...

nicFW890 V3.00.17

This is to address a bug in the SPI App when importing .nicfont files. They should import into the correct character slots now.

The firmware is still version .16 and need not be updated if yo...

nicFW TD-H3 V2.52.13

This is the members only post for the H3 nicFW release. This post may be replied to by members. Sorry, but since Patreon does not seem to offer a method to limit commenting on public posts to membe...

nicFW TD-H3 V2.52.13

Sorry, am reposting this as the last post got took over and DC flooded just like Facebook used to. So while this post is public and accessible to all, comments are disabled. A duplicate post will b...

When reporting issue for fixing

Please note that when reporting issues to be fixed, it needs to be tangible. So NOT an opinion, but an actual thing. So no things like "I think it sounds less clear" etc..

It also needs to be...

RT-900 Update

Hey everyone,

I've been deeply absorbed in the RT-900 firmware port over the past few days and have made a ton of progress. It's still far from being usable, but I’ve been focusing on getti...

RT-900 is cooking. [Update]

We have basic device init, interrupts running, background processes running, radio chip init, the SPI flash is giving me problems currently but I'll crack it.

This is almost a mirror of how t...