This document is prepared to share a thorough explaination of the execution of the BIRDS-RP satellite bus software.
The system block diagram of the BIRDS-RP satellite is detailed in figure 1 below.
Edit with draw.io
The organisational file stucture of the microcontrollers in the BIRDS-RP OBC board is detailed in figure 2 below.
The following table shows the flow chart of operation for the START PIC after RBF pin is removed and 30 minutes after the satellite is launched for the ISS.
| After RBF removed | After ISS release |
|---|---|
 |
 |
| Edit with draw.io | Edit with draw.io |
The files found in the START PIC folder are detailed in Table 1 below.
| File name pattern | Scope | Content |
|---|---|---|
| STARTPIC.c | ||
| StartPIC_Functions.c |
The following table shows the flow chart of operation for the RESET PIC after RBF pin is removed and 30 minutes after the satellite is launched for the ISS.
| After RBF removed | After ISS release |
|---|---|
 |
 |
| Edit with draw.io | Edit with draw.io |
The files found in the RESET PIC folder are detailed in the table below.
| File name pattern | Scope | Content |
|---|---|---|
After the satellite is released to its orbit, the startpic turn on the power line to the Main PIC
The following table shows the flow chart of operation for the MAIN PIC 30 minutes after the satellite is launched from the ISS and in nominal operation.
| After ISS release | Nominal operation |
|---|---|
 |
|
| Edit with draw.io | Edit with draw.io |
The files found in the MAIN PIC folder are detailed in the table below.
| File name pattern | Scope | Content |
|---|---|---|
