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1. Sidplay decoder registration#
2. Sidplay decoder software#
3. Sidplay decoder code#
4. Sidplay decoder windows#

Step 1: The common cathode 7-segment display is analysed in the first step of the design.

A common cathode 7 segment display has eight pins: seven input pins designated ‘a’ through ‘g,’ and one common ground pin. The complementary law, associative law, and De-law, Morgan’s for example, are some essential Boolean algebra rules to follow.Ī 7 segment LED display is made up of 8 LEDs arranged in such a way that either all of the anodes or all of the cathodes are common. To comprehend the design and operation of these logic circuits, a thorough understanding of Boolean algebra and logic gates is required. Encoders and Decoders, Multiplexers and De-multiplexers, Adders and Subtractors, and other circuits are good examples. The output of a combinational logic circuit is solely determined by the current state of the inputs. A system of logic gates with only outputs and inputs is known as a combinational logic circuit. It could be a BCD to 7 segment decoder or a basic binary to decimal decoder.Ĭombinational logic circuits is another important element. A decoder is a type of combinational circuit that converts a binary or BCD (Binary Coded Decimal) number to its decimal equivalent. The decoder is the most important aspect of this circuit. Using Karnough’s map, logic circuitry for each input to the display is designed. The logic circuit is designed with 4 inputs and 7 outputs, each representing an input to the display IC. The basic idea involves driving a common cathode 7-segment LED display using combinational logic circuit. Using logic gates, we create a simple display decoder circuit.ĭespite the availability of commercial BCD to 7 segment decoders, creating a display decoder using logic gates may prove to be more cost-effective and knowledge-based. It has four input lines and seven output lines in most cases.

Sidplay decoder code#

To transform a BCD or binary code into a 7 segment code, a display decoder is used. However, these outputs are in the form of 4-bit binary coded decimal (BCD), which is incompatible with driving the seven-segment display directly. Typically, these displays are operated by digital IC output stages (for which visual indication of the output stages is required), such as latches and decade counters.

Sidplay decoder registration#

*Uploading to the warehouse requires registration with the FUNcube Data warehouse.Īll the code for the telemetry decoder, and the scripts to build the Docker images, are now published online at the FUNcube-Dev GitHub account –  under a GPL Open Source License.Seven-segment displays, on the other hand, are most typically used to display characters and numbers (in order to make the decimal readout). *Both modes, when connected to the internet, will upload the received data to the FUNcube Data Warehouse and the totals displayed on the Ranking Page in the normal manner. This mode allows for the automatic restarting of the telemetry decoder after a shutdown or reboot of the Raspberry Pi, therefore making it suitable for a remote deployment situation. “Background Mode” allows the telemetry decoder to run as a Docker image in the background where it operates much like any other background service on Linux. “Interactive Mode” is when the Telemetry Decoder operates in the foreground, when FUNcube compatible telemetry is received, the corresponding hex data is displayed on the terminal screen. The Pi decoder receiving telemetry from JY1Sat in Interactive mode The decoder and warehouse uploader run as a Docker container for convenience shell scripts have been provided to launch the container in one of two modes: The Telemetry Decoder is configured with five active decoders operating concurrently so it can deal with situations where more than one of the spacecraft are overhead at the same time.

Sidplay decoder software#

The software will tune a dongle to search for and track all three FUNcube compatible spacecraft currently operational. The Linux implementation is suitable for use on Raspberry Pi versions from 2B+ to 4 and with a FUNcube dongle (Pro or Pro+). This led us to evolve the code such that it would run on a Raspberry Pi. Late 2019, we had the opportunity to develop a low power/low impact ground station, based on Docker containers, for use at the Neumayer III Antarctic base at DP0GVN. We had planned to opensource the Telemetry Decoder and provide an implementation on Linux, but several new missions after the original FUNcube-1 delayed our plans somewhat.

Sidplay decoder windows#

The original FUNcube telemetry decoder and Dashboard was designed to run on Windows devices and we did publish the telemetry format in accordance with the Amateur Satellite Service traditions and requirements. The FUNcube Raspberry Pi Telemetry Decoder.