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Found 113 results

  1. SC_METHOD Eception

    Hi, I'm trying to use a SC_METHOD in my simulation. Here is the code: gcrypt::gcrypt(sc_module_name name): gcrypt_base(name) { SC_METHOD(on_clock_update); sensitive << clock; dont_initialize(); }; void gcrypt::on_clock_update() { if (clock.read() == 0) { SC_REPORT_WARNING(name(), "Invalid clock port value of 0"); _ns_per_cycle = 0; return; } _ns_per_cycle = 1e9 / clock.read(); } The gcrypt_base constructor is: gcrypt_base::gcrypt_base(sc_module_name name) : sc_module(name), ... { ... } I get this exception thrown by SC_METHOD: Exception thrown at 0x6FB78281 (vcruntime140d.dll) in SystemCModuleTest.exe: 0xC0000005: Access violation reading location 0x115348EF. I saw the __vfptr value was "Unable to read memory". How to solve this problem? Thanks, Chao
  2. define sc_main in VS 2017

    Hi, I am new to SystemC, I have installed SystemC 2.3.2 successfully in Visual Studio 2017. The only problem that I have is with sc_main() function. The compiler complained the entry point cannot be found. I understand that the default entry point in VS is int main(). I have read IEEE Std 1666-2011 clause 4.3 about sc_main() and sc_elab_and_sim(). I tried to use following code to start simulation. But it failed. The compiler showed error message: "identifier "sc_eabl_and_sim" is undefined". int main(int arg, char* argv[]) { sc_elab_and_sim(arg, argv); //The rest code for simulation and testbench ... } How do I make sc_main(int arg, char* argv[]) function work in VS 2017? If not possible, how to properly call sc_eabl_and_sim(int arg, char* argv[]) in an int main(int arg, char* argv[]) to start a simulation?
  3. sc_thread vs pthread

    Hi, I am new to SystemC. I have two questions. 1) Do sc_thread generates separate Linux thread for each call and what is the difference between the POSIX thread and sc_thread? 2) Why systemC has no parallelization scheme? The SystemC scheduler uses cooperative multitasking and cannot exploit fully the potential of SMP workstation.
  4. Hi I have to use the sc_vector command to pass an array let's say Array[16][16] between the modules. Kindly can you tell me how to write the input side vector at the MODULE A and output side vector at the MODULE B to pass this array. I am beginner and donot know how to use the sc_vector command. Thanks
  5. Hi, I want to run the diagram given below. I am executing the modules with the respective processes but it only execute once and then the loop dies. I am providing the static sensitivity to the processes inside the modules e.g. sensitive<< sig1; and so on. How to make the execution multiple times as mentioned in the STEPS in the Diagram. I need help in running the STEPS multiple times before we proceed to the next step in System C code. Thanks
  6. Hi I am running the Sequence of Modules in the flow like: 1) Memory Module 2) Data fetching to the Weight and Image_Cache Modules 3) Processing_PIXEL_MODULE and so on. But I wanted to go back from Processing_pixel_Module to the Image_Cache Module for Cache refill. Can You help me that how can I achieve this. I wanted to go back to the Image_Cache Module to refill the Cache from the Memory module. thanks.
  7. Hi The TLM_READ_COMMAND IS NOT READING THE DATA ARRAY COMPLETELY. What can be the possible reason. I have allocated an array through malloc command in the memory module. and Then from the second module i am trying to read that array using the TLM_READ_COMMAND but the array is not being read completely and it stops in the mid somewhere. Just not running any further without showing any error. What can be possible reason for this . Thanks
  8. Hi I have to load a floating point data from the binary file and save it in an array inside the MODULE_1 (Memory) and then I wanted to transfer the content of that array from MODULE_1 to Another MODULE_2 (CACHE) through TLM. Can You guide me how to save an array in MODULE_1 (Memory) and transfer the floating point data to another MODULE_2 (Cache) through TLM. I am trying to read the data from CACHE to MEMORY but TLM_GENERIC_PAYLOAD does not access the correct memory address of the array elements to read from and therefore I am just reading some garbage value. A help through sample code is much appreciated. Thanks
  9. // MODULE 1 WRITING THE OUT1 to Value 1 SC_MODULE(MODULE_1){ public: //-------------PORTS DECLARATIONS--------------------------- sc_in<bool> reset; sc_out<bool> out1 ; // ---event sc_event sig_written; public: void Process(); public: SC_CTOR(MODULE_1){ SC_METHOD(Process); sensitive << reset; } void Process() { if (reset == 1) out1.write(1); sig_written.notify(); // to make it runnable within the execution phase and not in the Next delta cycle } }; //---------------------------------------------------------------------------------------------------------- // MODULE 2 READING OUTPUT VALUE FROM MODULE_1 SC_MODULE(MODULE_2){ public: //-------------PORTS DECLARATIONS--------------------------- sc_in<bool> input1; sc_out<bool> out2 ; public: // HOW TO DEFINE EVENT HERE ? // PROCESS void Process(); public: SC_CTOR(MODULE_2){ SC_METHOD(Process); sensitive << input1; } void Process() { bool x; x = input1.read(); // reading the Output Value from Module 1. I want to read here 1 because of output // written in the MODULE_1 is 1 if (x == 1) out2.write(1); // HOW TO USE EVENT HERE ? SHARED EVENT } }; Hi I am outputting One value from MODULE 1 and notifying it through sig_written.notify() event to make it detectable in the same execution phase and not in the next delta cycle. Can You tell me How to use the event in the MODULE_2 to detect this event and read the value immediately without going into next delta cycle. thanks
  10. Hi I have 3 to 4 modules and they have 3 to 4 inputs but to synchronize the timing of inputs as they all have to have specific value only then my THREAD PROCESS should run, I am using value_changed_event inside the THREAD PROCESS of the MODULE by using wait(sig.value_changed_event()). But In some MODULES, I am initializing large arrays and due to this when the value changes then it rerun from the 1st Module to the Last and stops in the mid-way displaying the stack over flow as the exception. What Should be the possible solution for this ? I have Increase the Stack size upto 1Giga but still does not work. Thanks
  11. Hi In TLM, I am connecting two modules with the Initiator socket and target socket. My question is that "Is that possible to have also signal based connection between the modules as well as the Socket based connection " ? Can we have communication in both ways in SystemC ? Thanks
  12. Memory Allocation In SystemC

    Hi, I have to Allocate Memory for my data in SystemC. We Use malloc in C Language and New in C++ to dynamically Allocate Memory. But today I have read that we cannot use New and Delete Operators in System C as they are not synthesizeable. Which command should I use for Memory Allocation in System C. Thanks.
  13. SystemC for Hardware Design

    Hi, We use SystemC to define specific Hardware Blocks like Memory, Caches and Bus etc. We define Header and CPP files and Include processes to define the functionalities being done by each module. BUT let's say Now we have to define the general settings of the Whole Network (like NEURAL NETWORKS AND DEEP LEARNING NETWORKS) which include Two or three STRUCTS about configuration and we make additional Header and CPP file for this. WILL THAT BE CONSIDER AS A FURTHER HARDWARE IN THE SYSTEM C Design. Is that allowed or not ? This is a general question? Please explain me this in detail? Thanks
  14. hi, I want to implement systemC TLM design that uses a simple bus to communicate between the two separate modules. I want to know how to use systemc built in simple bus library. Please help me in this regard. Thanks in advance.
  15. hi, I want to implement systemC TLM design that uses a simple bus to communicate between the two separate modules. I want to know how to use systemc built in simple bus. Please help me in this regard. Thanks in advance.
  16. void Wcache0::getAddrForSingleWeight(const channel_t co, kernel_t kernel_1, const weightaddr_t ci_offset, PEID_t &PEID, blockID_t &blockID, rowID_t &rowID, weightID_t &weightID) Hi, Can we pass arguments inside the process in SystemC. If Yes then how we have to register the process in the constructor? Thanks . Below is the MODULE Wcache0 and I am trying to write getAddrForSingleWeight process which will be called inside another process which is register as SC_THREAD.
  17. Hi, Can we pass arguments inside the process in SystemC. If Yes then how we have to register the process in the constructor? Thanks . Below is the MODULE Wcache0 and I am trying to write getAddrForSingleWeight process which will be called inside another process which is register as SC_THREAD. void Wcache0::getAddrForSingleWeight(const channel_t co, kernel_t kernel_1, const weightaddr_t ci_offset, PEID_t &PEID, blockID_t &blockID, rowID_t &rowID, weightID_t &weightID)
  18. Hi I have written a sample code in SystemC. I am defining some typedefs and global variable outside SC_MODULE. Is that fine? and plus I am also defining the member function as static. Please correct my code. Thanks
  19. Hi. I am working on the Design Flow of the Given Architecture and I making the SystemC Model on the basis of the given diagram description. I not included in my System C Model the shared DRAM. Can You guide me How I have to model the Shared DRAM near Memory Controller Box in System C (As a Module or not ?) as shown in the first picture. Give me some System C Block diagram for this architecture as I am new to the System C. Thanks
  20. Saw the UVM-SystemC-1.0-beta1 download link, try to install it, but according to the INSTALL file, I can't find "configure" in the package. How could I install it?
  21. clock problem

    Hi all, i'm implementing a timer/counter(8-bit) that should not increment on every clock and i'm not supposed to provide any input clock port . But i need clock period in my design so my question is " How would i provide clock period(through constructor)?" here is the link to my working code on EDAplayground : http://www.edaplayground.com/x/4_dY if there is any problem in my code please feel free to tell me. regards, jatin
  22. Hi all, is there any way to implement the intra assignment delay in systemC without using sc_event()? for example : in verilog we write out = #10 in1 + in2; // intra assignment delay. how would i implement the same in systemC? regards, jatin
  23. Hello, I am using SystemC 2.3.0. I am wondering how I can profile the SystemC library. I found we can use options like "--enable-debug" and "--disable-optimize" for debugging and optimization, respectively, but I was unable to find such an option to enable profiling. I need to use gprof and pass "-pg" options when building SystemC. Any help is greatly appreciated! Thank you in advance.
  24. I can't find any example in the uvm-systemc preview package which DUT has clock and reset signals. I tried to create clock with sc_clock in sc_main and connected it my dut's clock signal. But it looks the simulation will never finish. So would someone let me know what's the right way to handle the clock and reset signals?
  25. Hey, Kahn Process Networks are defined by the usage of unbounded FIFOs with blocking reads and non-blocking writes. I read on several sources that KPN with bounded FIFO size (i.e. blocking read and blocking write) can be implemented with SystemC (e.g. Grötker et al). It seams that the event based scheduler in SystemC behaves different like data-driven scheduler or a demand-driven for KPNs. I simulated the networks of Park's Dissertation shown on page 36 and 42 which should end up in an artificial deadlock (deadlock which occurs because of blocking write). A global artificial deadlock in SystemC would result in no scheduled events, and therefore, the simulation should be stopped. However, even with buffer size 1 for all FIFOs both examples from Park are continuing with execution: Page 63: http://www.edaplayground.com/x/6Mfi Page 42: http://www.edaplayground.com/x/4jLZ Note that edaplayground exits because of to much output. If you want to test it you better download it and run it on your PC. Apparently, the SystemC scheduler finds automatically a schedule for the KPN such that no artificial deadlocks occur. My question: is there an example where I could also see an artificial deadlock in SystemC? Thanks and Regards Matthias
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