nicsure

H3 Webtools used on nicsure.co.uk

As the site is currently down with no plans (as yet) to bring it back (I am just too busy) I thought I would package the online H3 tools so that others may host them elsewhere, they may even work directly from double clicking the html files.

Feel free to tweak, these files are fully PD, do with them as you wish.

RT-900 Conversion In Full Swing

Now that the base build environment and toolchain is sorted (thanks Kelvin) the conversion of nicFW to the RT-900 is underway.

As you all know, this part is a grind and I work best like this without distraction. I will post from time to time with progress, but I'm going to be mainly glued to VS Code for a while.

It took me about a month to port nicFW to the 890 so I'm anticipating maybe twice that as the 900 has a lot more to it than the 890 and there is a significan...

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 you are already running .16

RT-900 Firmware Flash Protocol Packet Structure

u8 leader; // always 0xAA
u8 command;
u8 blockNumber; // flash address is 0x08003000 + (blockNumber  * 0x400)
u16 dataLength; // big endian
u8 data[dataLength];
u16 crc16; // crc16/xmodem everything from command to the end of the data section
u8 trailer; // always 0xEF

From what I can tell, data is not encrypted or obfuscated. If there is any kind of obfuscation I think it's happening at the firmware level not any deeper, so unobfuscated...

Radtel RT-900 Fix Bricked

If you get a bad flash on an RT-900 it may appear to be bricked as you cannot get back to the update mode (switch on with two buttons under PTT pressed).

It is not bricked. The problem is the radio does not have a hard power off. The switch on the volume control is a software switch, so if there's no valid firmware running to power the device down you can no longer turn it off, and thus cannot turn it back on to get into flash mode.

The fix is pretty simple. There may be other way...

RT-900 Firmware Update Process Log

ComSnooper log file of the entire firmware update process.

Radtel RT-900 Demo Source Keil Project

This is the RT-900 demo source code project for Keil that was supplied by Radtel.

TD-H3 EEPROM_WIPE.bin

As requested, am posting the EEPROM_WIPE.bin here.

Radtel RT-900 News

All development for the RT-900 will be exclusively on Patreon until such time as I feel it is ready for actual public release. To be a part of the early RT-900 efforts you will need to sign up.

nicFW TD-H3 V2.53.13

Small beginnings

[BUG]

Submitted by: shawn__blank

Status: Investigating

Version: RC2.1

Plugging in external MIC (Anytone brand) causes screen corruption and requires power cycling to recover.

Update 1: Unable to replicate with my external mic, but it's not the same kind as shawn's. Need to further investigate Anytone mics to see how they differ.