As one simple example, let's assume that an engineer is designing a circuit that makes use of an existing module to perform a mathematical function such as afast Fourier transform(FFT). A Verilog representation
创建之后把变量置为0值，make是用于引用类型（map，chan，slice）的创建，返回是引用类型的本身。
PyObject *f_trace; /* Trace function */ /* If an exception is raised in this frame, the next three are used to * record the exception info (if any) originally in the thread state. See * comments before set_exc_info() -- it's not obvious. * Invariant: if _type is NULL, then...
10);// Function is called with "" which is the default moderes = fn(a);// Even if value of a is changed inside the function, it is not reflected here$display("After calling fn: a=%0d res=%0d", a, res);end// This function accepts ...
for (i=0; i < 4095; i = i + 1) #0 ram[i] <= 0; Of course, this code is not good code for many reasons (including efficiency, since it forces unnecessary reschedulings of the process) and should be written as below (which won’t trigger the limit): ...
an explicit static keyword shall be required when an initialization value is specified as part of a static variable's declaration to indicate the user's intent of executing that initialization only once at the beginning of simulation. The static keyword shall be optional where it would not be le...
Often a function is created when the same operation is done over and over throughout Verilog code. Rather than rewriting code, one can just call the function. This prevents copy and paste errors and allows for more maintainable code: if the behavior of the function changes, it only needs ...
fifo_counter is incremented ifwrite takes place and buffer is not full and will be decremented id read takesplace and buffer is not empty. If both read and write takes place, counter willremain the same. fifo_counter写而未满时增加1,读而未空时减1。同时发生读写操作时,fifo_counter不变。
("second_block defined, first_block is not"); 'else 'ifndef last_result initial $display("first_block, second_block, last_result not defined."); 'elsif real_last initial $display("first_block, second_block not defined,last_result and real_last defined."); 'else initial $display("Only...
fifo_counter is incremented ifwrite takes place and buffer is not full and will be decremented id read takesplace and buffer is not empty. If both read and write takes place, counter willremain the same. fifo_counter写而未满时增加1,读而未空时减1。同时发生读写操作时,fifo_counter不变。