AR# 9219: 2.1isp6 XC9500 Family Hitop - Dr. Watson when executing hitop.exe
AR# 9219
2.1isp6 XC9500 Family Hitop - Dr. Watson when executing hitop.exe
説明
Keywords: Fitter, fit, crash, Dr. Watson, hitop, hitop.exe, 9500XL, Webpack
Urgency: Standard
General Description: When running a design through either Foundation 2.1i_sp6 or Webpack 2.1 WP6.x, the fitter crashes on Win95, Win98, and gives a Dr. Watson for hitop.exe on WinNT. This was seen for designs targeting XC9500 family devices.
Webpack 6.1 running WinNT: Dr. Watson hitop.exe Exception: access violation (0xc0000005), Address: 0x00449ee7 Done: failed with exit code: 0002.
ソリューション
In one case, bidirectional I/O was used with no logic on the tristate's OE. This is seen in the translation report as follows and will cause the fitter to crash:
WARNING:NgdHelpers:332 - logical net "OE" has no driver
This is fixed in 3.1i. The workaround is to ensure that the output enables are connected to a logic (it may be VCC or GND).