全面模仿AVR的UART功能

				Thu May 07 21:04:51 中国标准时间 2009
				Trace back: ** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				
				    while executing
				"ProjectWrite F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf 6 work unused {F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/src/top.v {cover_..."
				    ("eval" body line 1)
				    invoked from within
				"eval [linsert $ProjectWriteArgs 0 ProjectWrite ]"
				    (procedure "SaveProjectSpecificSettings" line 62)
				    invoked from within
				"SaveProjectSpecificSettings"
				    (procedure "quit" line 10)
				    invoked from within
				"quit"
				    (command for "WM_DELETE_WINDOW" window manager protocol)
				  2: ::tkerror {** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				}
				  1: ::bgerror {** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				}
				Thu May 07 21:05:41 中国标准时间 2009
				Trace back: ** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				
				    while executing
				"ProjectWrite F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf 6 work unused {F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/src/top.v {cover_..."
				    ("eval" body line 1)
				    invoked from within
				"eval [linsert $ProjectWriteArgs 0 ProjectWrite ]"
				    (procedure "SaveProjectSpecificSettings" line 62)
				    invoked from within
				"SaveProjectSpecificSettings"
				    (procedure "quit" line 10)
				    invoked from within
				"quit"
				    (command for "WM_DELETE_WINDOW" window manager protocol)
				  2: ::tkerror {** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				}
				  1: ::bgerror {** Error: (vish-7) Failed to open mpf file "F:/EdaOk/project/PeriphDIY/uart/fpga/V0p00/testbench/uart.mpf" in write mode.
				Permission denied. (errno = EACCES)
				}