mirror of
https://git.sr.ht/~kivikakk/niar
synced 2024-12-23 03:12:24 +00:00
77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
#include <cassert>
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#include <fstream>
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#include <iostream>
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#include <optional>
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#include <cxxrtl/cxxrtl_vcd.h>
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#include <newproject.h>
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static cxxrtl_design::p_newproject top;
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static cxxrtl::vcd_writer vcd;
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static uint64_t vcd_time = 0;
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static void step() {
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top.p_clk.set(true);
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top.step();
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vcd.sample(vcd_time++);
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top.p_clk.set(false);
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top.step();
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vcd.sample(vcd_time++);
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}
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int main(int argc, char **argv) {
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std::optional<std::string> vcd_out = std::nullopt;
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for (int i = 1; i < argc; ++i) {
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if (strcmp(argv[i], "--vcd") == 0 && argc >= (i + 2)) {
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vcd_out = std::string(argv[++i]);
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} else {
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std::cerr << "unknown argument \"" << argv[i] << "\"" << std::endl;
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return 2;
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}
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}
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if (vcd_out.has_value()) {
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debug_items di;
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top.debug_info(&di, nullptr, "top ");
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vcd.add(di);
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}
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top.p_rst.set(true);
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step();
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top.p_rst.set(false);
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// ledr should be low or high according to 'expected', where each element
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// represents 1/4th of a second. ledg should always be high.
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//
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// This mirrors test_blinks in Python.
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int rc = 0;
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bool done = false;
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std::vector<int> expected = {0, 1, 1, 0, 0, 1, 1, 0};
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for (std::vector<int>::size_type i = 0; i < expected.size() && !done; ++i) {
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for (int j = 0; j < (CLOCK_HZ / 4); ++j) {
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if (top.p_ledr.get<int>() != expected[i]) {
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std::cerr << "unexpected ledr at i(" << i << "), j(" << j << ")"
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<< std::endl;
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rc = 1;
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done = true;
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break;
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}
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assert(top.p_ledg);
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step();
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}
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}
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std::cout << "finished on cycle " << (vcd_time >> 1) << std::endl;
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if (vcd_out.has_value()) {
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std::ofstream of(*vcd_out);
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of << vcd.buffer;
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}
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return rc;
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}
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