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Diffstat (limited to 'src/systemc/tests/systemc/misc/stars/star127536/test.cpp')
| -rw-r--r-- | src/systemc/tests/systemc/misc/stars/star127536/test.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/systemc/tests/systemc/misc/stars/star127536/test.cpp b/src/systemc/tests/systemc/misc/stars/star127536/test.cpp new file mode 100644 index 000000000..58ac9941c --- /dev/null +++ b/src/systemc/tests/systemc/misc/stars/star127536/test.cpp @@ -0,0 +1,129 @@ +/***************************************************************************** + + Licensed to Accellera Systems Initiative Inc. (Accellera) under one or + more contributor license agreements. See the NOTICE file distributed + with this work for additional information regarding copyright ownership. + Accellera licenses this file to you under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with the + License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + *****************************************************************************/ + +/***************************************************************************** + + test.cpp -- + + Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 + + *****************************************************************************/ + +/***************************************************************************** + + MODIFICATION LOG - modifiers, enter your name, affiliation, date and + changes you are making here. + + Name, Affiliation, Date: + Description of Modification: + + *****************************************************************************/ + +/* +Hello, + +sorry for asking again about the sc_start/sc_cycle problem but... + +The following program causes trouble (SystemC V2.0b2): +*/ + +#include "systemc.h" + +SC_MODULE(createpulse) + { + public: + sc_in_clk i_clk; + private: + int trigger1,trigger2; + void pulse() + { + while(true) + { + wait(); + cout << sc_time_stamp() << ": trigger1 : " <<trigger1++ << endl; + wait(1,SC_NS); + cout << sc_time_stamp() << ": trigger2 : " <<trigger2++ << endl; + } + } + public: + SC_CTOR(createpulse) + { + SC_THREAD(pulse); + sensitive << i_clk.pos(); + trigger1 = 0; + trigger2 = 0; + } + }; + +// createpulse dut("testpulse"); + +int sc_main(int argc, char *argv[]) + { + int i; + sc_trace_file *tf; + sc_signal<bool> clk1; + + sc_set_time_resolution(1,SC_NS); + sc_set_default_time_unit(1,SC_NS); + + // sc_clock dummy( "dummy", 2, SC_NS ); + + createpulse dut("testpulse"); + + dut.i_clk(clk1); // see other posting + + tf=sc_create_vcd_trace_file("vcdtrace"); + sc_trace(tf,clk1,"clock"); + + // sc_initialize(); // comment out for sc_start version + for(i=0;i<10;i++) + { + clk1=0; + // sc_cycle(5,SC_NS); // change to sc_start + sc_start( 5, SC_NS ); + clk1=1; + // sc_cycle(5,SC_NS); // change to sc_start + sc_start( 5, SC_NS ); + } + + cout << "finishing at " << sc_time_stamp() << endl; + sc_close_vcd_trace_file(tf); + + return(EXIT_SUCCESS); + } + +/* +With this programm, the clk1 is generated as can be seen in the trace file. +But the pulse procedure gets stuck in the second wait function. With SystemC +V1.x, this worked with replacing sc_cycle with sc_start (and removing the +sc_initialize), however calling sc_start multiple was an undocumented feature +and it doesnt work in V2.0b2 (no clk is generated). +I know that this problem can be solved by creating an own clock generation +module using wait()s and just a single sc_start in sc_main, but IMHO +sometimes it is desirable to do it the way shown above. So is this possible +with SystemC V2.0 ? + +Regards, Sven Heithecker + +-- +Sven Heithecker IDA, Hans-Sommer-Str. 66 +Technical University of Braunschweig 38106 Braunschweig +Tel. +49-(0)531-391-3751(voice)/4587(fax) Germany +http://www.ida.ing.tu-bs.de/~svenh heithecker@ida.ing.tu-bs.de +*/ |