What is opentvc?

Open thrust vector control (opentvc) is a model rocket flight firmware that is built to runs on the hyphen flight computer.
The firmware features libaries that supports control for servos, USART, SPI and the on-board hardware. Data is sent from an AVR microcontroller via UART and received by Nordic nRF5832 BLE module.
This exchage is biodirectional so data can also be sent out from the BLE module to AVR microcontroller.

Installation

Running in Docker

1. Build docker environment

docker build -t opentvc:0.5 .

2. Run docker environment

docker run -it opentvc:0.5

3. Change directory to where source file sits

cd board 

4. Build firmware

make 

Servo library usage example

#include "drivers/servo.h"

int main(void) {
  servoInit(); // Configures 16 bit registers for 50Hz PWM signal.
  servoAttach(Y_SERVO); 
  servoAttach(Z_SERVO);
  while(1) {
    servoWriteY(0); // Write angle 0 to servo controlling Y axis
    servoWriteZ(0); // Write angle 0 to servo controlling Z axis
  }
  return 0;
}

Directory Structure

• board -- Code that runs on the ATmega328/328P
• doc -- Doxygen documentation folder

---

board
    ├── fxas21002 # Library used for retrieving gyroscope data
    ├── fxos8700cq # Library used for retrieving accelerometer and magnetometer data
    ├── servo # Library used for servo control
    ├── usart # Library used for USART communication
    ├── time # Library used timing events
    ├── spi # Library used for SPI communication
    ├── hardware # Library used to control on-board hardware 
    ├── firmware # Folder that holds compiled firmware