Beobot 2.0/Electrical System/Prototype Final KVM Board
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| * KVM USB - propeller control | * KVM USB - propeller control | ||
| * KVM VGA - propeller control | * KVM VGA - propeller control | ||
| - | * USB[0,1,2,3] out from each computer. | + | * USB[0,1,2,3,4,5] out from each computer. There are a few signals that are not fixed. They are listed on the top of the main electrical section. |
| * KVM power | * KVM power | ||
Revision as of 19:34, 6 Nov 2009
| Table of contents |
KVM Prototype Final Objectives
|
To Do
- 24V power to COM Express modules
Done
- KVM USB - propeller control
- KVM VGA - propeller control
- USB[0,1,2,3,4,5] out from each computer. There are a few signals that are not fixed. They are listed on the top of the main electrical section.
- KVM power
KVM Prototype Final Results
No catastrophic error yet.
Bug List
- 7-segment Display footprint error. FIXED in Library & jump some wires in the board, underneath the 7-segment display (on both the KVM and back-display board).
- 5VCC global is not connected FIXED by jumping wires in the board.
- MAX4999 pin 22(D4+),23(D4-) is flipped. FIXED in the Altium library file and & jump some wires in the board.
Logs
Thursday, May 7, 2009
Soldered the components unto the boards
Friday, May 8, 2009
Found 7-segment display pinout error. 5VCC Common (pin C30) is not connected.
Wednesday, June 3, 2009 Finished the Propeller control for both VGA and USB KVM. Found a bug in the USB Mux MAX4999: pin 22(D4+),23(D4-) is flipped. The correct one is: pin 22(D4-),23(D4+). This was a known problem that was supposed to have been fixed at P1, but was mistakenly un-changed.
KVM table
| Computer #__ | 7-Seg Display #__ | VGA__ | VGA_C3..C0__ | VGA_Sel__ | USB__ | USB_C2..C0__ |
| T1 | 1 | 7 | 1011 | 1 | 4 | 100 |
| T2 | 2 | 4 | 0111 | 0 | 6 | 110 |
| T3 | 3 | 1 | 1110 | 0 | 0 | 000 |
| T4 | 4 | 2 | 1101 | 0 | 2 | 010 |
| B1 | 5 | 6 | 1101 | 1 | 3 | 011 |
| B2 | 6 | 5 | 1110 | 1 | 1 | 001 |
| B3 | 7 | 8 | 0111 | 1 | 7 | 111 |
| B4 | 8 | 3 | 1011 | 0 | 5 | 101 |
Back to Electrical System
