forked from cores/microwatt
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
1.3 KiB
C++
84 lines
1.3 KiB
C++
#include <stdlib.h>
|
|
#include "Vtoplevel.h"
|
|
#include "verilated.h"
|
|
#include "verilated_vcd_c.h"
|
|
|
|
/*
|
|
* Current simulation time
|
|
* This is a 64-bit integer to reduce wrap over issues and
|
|
* allow modulus. You can also use a double, if you wish.
|
|
*/
|
|
vluint64_t main_time = 0;
|
|
|
|
/*
|
|
* Called by $time in Verilog
|
|
* converts to double, to match
|
|
* what SystemC does
|
|
*/
|
|
double sc_time_stamp(void)
|
|
{
|
|
return main_time;
|
|
}
|
|
|
|
#if VM_TRACE
|
|
VerilatedVcdC *tfp;
|
|
#endif
|
|
|
|
void tick(Vtoplevel *top)
|
|
{
|
|
top->ext_clk = 1;
|
|
top->eval();
|
|
#if VM_TRACE
|
|
if (tfp)
|
|
tfp->dump((double) main_time);
|
|
#endif
|
|
main_time++;
|
|
|
|
top->ext_clk = 0;
|
|
top->eval();
|
|
#if VM_TRACE
|
|
if (tfp)
|
|
tfp->dump((double) main_time);
|
|
#endif
|
|
main_time++;
|
|
}
|
|
|
|
void uart_tx(unsigned char tx);
|
|
unsigned char uart_rx(void);
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
Verilated::commandArgs(argc, argv);
|
|
|
|
// init top verilog instance
|
|
Vtoplevel* top = new Vtoplevel;
|
|
|
|
#if VM_TRACE
|
|
// init trace dump
|
|
Verilated::traceEverOn(true);
|
|
tfp = new VerilatedVcdC;
|
|
top->trace(tfp, 99);
|
|
tfp->open("microwatt-verilator.vcd");
|
|
#endif
|
|
|
|
// Reset
|
|
top->ext_rst = 0;
|
|
for (unsigned long i = 0; i < 5; i++)
|
|
tick(top);
|
|
top->ext_rst = 1;
|
|
|
|
while(!Verilated::gotFinish()) {
|
|
tick(top);
|
|
|
|
uart_tx(top->uart0_txd);
|
|
top->uart0_rxd = uart_rx();
|
|
}
|
|
|
|
#if VM_TRACE
|
|
tfp->close();
|
|
delete tfp;
|
|
#endif
|
|
|
|
delete top;
|
|
}
|