Feature #884
UART protocol between front panel board and digital board.
| Status: | Closed | Start date: | 28/12/2013 | |
|---|---|---|---|---|
| Priority: | Normal | Due date: | ||
| Assignee: | tin | % Done: | 0% | |
| Category: | - | |||
| Target version: | Keithley 2001 #6 |
Description
All display and key data transfer between CPU and front panel board is done by UART interface
Captured log example attached.
Display data transfered in ASCII + control bytes for blinking/special segments, etc.
R603,R604 on signal lines was probed with CP2103 USB-UART bridge
Settings: 8N1 9600 baudrate
Easy to use for custom application if perform full decode for protocol.
Requirement for front-panel board and VFD:
- +5.5VAC with center tap for filament
- +60 VDC for segment drive
- +5VDC for controller and logic
- 4MHz clock
- System reset signal line
History
#1 Updated by tin about 5 years ago
- Target version changed from Keithley 2001 #7 to Keithley 2001 #6
#2 Updated by tin over 4 years ago
- Status changed from Resolved to Closed