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robertbowen
10 Posts |
 Posted - 08 Dec 2002 : 21:46:57
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Dear Forum Members:
Over the past week I have noticed my GMaster develpoment system does not fully boot(WinCE 3.0). On power-up or reset, the LCD screen displays a bright white screen, then moments later the unit powers down.
This occurs both with either a 'reset' or a cold re-boot (removing main AC power). Sometimes, I have to cycle power a dozen times before I get a sucessful boot.
I have been able to capture the boot sequence through the DEBUG COM3 port for both a sucessful boot and one in which I am presented with the "white-screen of death". I'll enclose it for your review. The only difference I can see is the last line...
* ADSLOAD.EXE(do-nothing build): Complete
Side Note: I noticed that the 5VDC supply from J7 Pin 35 & 40 to read 4.5 - 4.6VDC. This seems a little low. However, when the system does boot sucessfully the voltages does not change. It still measures low.
I'm open for any suggestions.
Thanks in advance,
Robert
// ***** Good Boot *******//
Determining boot cause.
Reset detected.
Starting monitor.
C0037FFC
Waiting for timers to stabilize.
** Graphics Master Loader initializing(0x5). **
ADS Graphics Master Rom Ver. 1.79 (DRAM : 32 MB, CL:3)
(Build at 12:33:10 on Nov 28 2001)
Finding PCMCIA cards.
Reading Flash Header Size...(0x101d bytes)
Reading Flash ...(from 0x40004 to 0x41021)
Reading Hardware Table values from Flash.
This is Color, 8 Bit, Active Panel.(Width = 640, Height = 480)
8 BPP Color.
Booting from Flash.
Reading Flash Header Size...(0x9bb647 bytes)
Reading Flash ...(from 0x100004 to 0xabb64b)
CE starts From DRAM(0xc8600000)
ÀWindows CE Kernel for ARM Built on Oct 18 2001 at 16:13:02
ProcessorType=0b11 Revision=8
sp_abt=ffff5000 sp_irq=ffff2800 sp_undef=ffffc800
Windows CE Image was built at 15:16:00 on Jan 9 2002.
Initializing Ethernet debug services.
Sp=ffffc7d0
InitializeJit
SMARTIO Detected : PartType:0x8535 Firmware:0x9002 Revision:6
Ethernet Detected : SMC91C96.
PS2 Keyboard Detected:
UCB1200 Detected : ID = 0x1004
Microsoft Windows CE Ver. 3.0 (build 126)
ADS GMASTER Windows CE Ver.(3.20)
* ADSLOAD.EXE(do-nothing build): Complete
======================================================
//*** Does Not Boot ****//
Determining boot cause.
Reset detected.
Starting monitor.
C0037FFC
Waiting for timers to stabilize.
** Graphics Master Loader initializing(0x5). **
ADS Graphics Master Rom Ver. 1.79 (DRAM : 32 MB, CL:3)
(Build at 12:33:10 on Nov 28 2001)
Finding PCMCIA cards.
Reading Flash Header Size...(0x101d bytes)
Reading Flash ...(from 0x40004 to 0x41021)
Reading Hardware Table values from Flash.
This is Color, 8 Bit, Active Panel.(Width = 640, Height = 480)
8 BPP Color.
Booting from Flash.
Reading Flash Header Size...(0x9bb647 bytes)
Reading Flash ...(from 0x100004 to 0xabb64b)
CE starts From DRAM(0xc8600000)
ÀWindows CE Kernel for ARM Built on Oct 18 2001 at 16:13:02
ProcessorType=0b11 Revision=8
sp_abt=ffff5000 sp_irq=ffff2800 sp_undef=ffffc800
Windows CE Image was built at 15:16:00 on Jan 9 2002.
Initializing Ethernet debug services.
Sp=ffffc7d0
InitializeJit
SMARTIO Detected : PartType:0x8535 Firmware:0x9002 Revision:6
Ethernet Detected : SMC91C96.
PS2 Keyboard Detected:
UCB1200 Detected : ID = 0x1004
Microsoft Windows CE Ver. 3.0 (build 126)
ADS GMASTER Windows CE Ver.(3.20)
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akidder
1519 Posts |
Posted - 15 Jan 2003 : 10:16:48
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Post script: We analyzed Robert's system and weren't able to find anything wrong with the Graphics Master. However, we did find that if we wiggled one of the wires coming from the mini DIN-8 power socket, power was interrupted enough to cause the system to reset. We replaced the power adapter cable.
Drew Kidder
Electrical Engineer
Applied Data Systems |
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GMaster WhiteScreen - No Boot (random)
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