NASACAM:Anderson Notes

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2011 May:

Determining why Vdetcom is shorting out.

Matt created a wiki account .

No shorts found in wiring harness or across card.

Begin work to get DSP code running on Mac or Windows 7.

2011 June:

Continue work on DSP code as it is needed for further debugging of Vdetcom short.

Information for updating the tim script for use under Wine can be found here: media: WineScript.pdf in an email from Bob Leach.

Other information on the electronics system and software, including login information for Astro-Cams, can be found here: Leach Electronics

June 10: More info on Wine can be found at http://wiki.winehq.org/FAQ

Wine + DSP Assembler installation on lab computer. Fedora Version Running: Fedora release 7 (Moonshine) 

cmd: more /etc/redhat-release


Install Wine: 

cmd: yum install wine
Wine installed.

DSP Versions: 

ASM Class 56300
DSP Gen III


Debugging Process: 

Used chmod -x to make the script Wine_tim executable.
Throws 2 errors. 1. :Bad Interpreter 2. No such file or directory.
Fixed with dos2unix Wine_tim.

DSP SUCCESS! 

DSP compiled with no errors... No testing of if the tim file works yet.
Wine_tim is the script for compiling the dsp code.
Wine_tim is found in /home/matt/Desktop/DSP/
Command to compile is ./Wine_tim
timboot.asm, timIRmisc.asm, and timmisc.asm must be present in directory for compiler to work.

DSP Check. 

New timing files have been checked via diff command. Files are identical except that in some cases an additional digit
has been added to the ends of some values. These digits come after the decimal place and are always zero so no change
in voltage should be observed.

VSS1 pin # 19 at DB37 reads -1V as listed in CRC744.waveforms.
VSS2 pin # 17 at DB37 reads -1V as listed in CRC744.waveforms.
VDDCL pin # 16 at DB37 reads -1.7V as listed.
VDDUC pin # 33 at DB37 reads -3.5V as listed.
VRSTUC pin # 14 at DB37 reads -3.5V as listed.
VDDOUT pin # 32 at DB37 reads -1.2V as listed.
VOFFSET pin # 15 at DB37 reads -1.5V as listed.
VGG1 pin # 13 at DB37 reads -3V as listed.
VGG2 pin #31 at DB37 reads 0V as listed.
VSSSCANF pin # 12 at DB37 reads -1V as listed.
VSSSCANS pin # 11 at DB37 reads -1V as listed.
VDET pin # 29 at DB37 reads 0V as expected (the short).

NOTE: Wine_tim is only executable as superuser at this point.


2011 July: 

VDET short found. A split in the insulator around the insulator has cracked such that when bent, the conductor is exposed and
causes the short. The wire is being replaced.
The other wires of the same material are being checked and replaced if necesary.

AT LEAST 2 OTHER WIRES IN THE FEED THROUGH ARE IN DANGEROUS CONDITION. THE WIRE IS VERY HEAVY AND STIFF AND SHOWS EVIDENCE OF A CREASE
CAUSED PERHAPS BY BEING CAUGHT IN THE HEAT SINK. FOR THE SAFETY OF THE ELECTRONICS IT IS NECESSARY TO REPLACE SEVERAL, IF NOT ALL
OF THE CONSTANTIN WIRES THAT WERE SOLDERED BY THE PEOPLE WHO INSTALLED THE COAX INTO THE WIRE HARNESS.

2011 August:

Rewiring of feed-through completed. Connections and wiring layout confirmed. Leach Electronics timing board upgraded and video board repaired of blown pins.

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