No more cisco routers and WIC cards! Now you can connect your quantar directly to a linked network without stacks of extra hardware. The DVM-V24 connects Quantars and other V24-capable equipment to the DVM Host (dvmhost) software.
DVM-V24 boards are available from the W3AXL Online Store. Purchasing through W3AXL supports development efforts for the DVMProject team and future hardware projects!
Schematics for the board are also included in the hw directory to build your own adapters.
This jumper connects the serial clock line to the RXCLK pin. Currently this jumper must be in place for the V24 adapter to work properly. In the future, the board will support external clocking, but for now the firmware only supports generating clocks for both TX & RX.
Firmware is availble in this repo, under the fw directory. It's written in bare C, generated from STM32CubeMX. You will need an STLink programmer in order to flash the boards with the latest version of software.
We recommend building the firmware for the DVM-V24 on a linux-based machine, since it's much easier to set up a working ARM toolchain.
Once you have the ARM toolchain installed, simply running make will create binary & elf files in a ./build/ directory. These can then be flashed using the STLink using the make flash command.
The DVM-V24 RJ45 is pinned out so that a straight-through RJ45 cable (i.e. any normal, non-crossover ethernet cable) can be used to connect to the Quantar's front wireline RJ45 connectors.
The following are the relevant fields that need to be configured in Quantar RSS:
| Field | Value |
|---|---|
| Wireline Operation | 4 WIRE FULL DUPLEX |
| Astro To Wireline | ENABLED |
| Wireline Interface | V.24 ONLY |
| External Transmit Clock | ENABLED |
| RT/RT Configuration | DISABLED |
dvmhost must be configured to operate in dfsi mode. Under modem, ensure the following parameters are set:
modem:
protocol:
type: "uart"
mode: "dfsi"
uart:
port: /dev/ttyACM0 # change to your v24 board's serial port
speed: 115200
dfsi:
rtrt: true
diu: true
jitter: 200We are still investigating compatibility with the CCGW's V24 port. In theory, it should be possible, however early tests have shown the CCGW in Quantar compatibility mode does not properly mirror the Quantar's V24 port behavior.
Support is available on our Discord server - there are many users and project members online who can help with any issues you may encounter. Join here!