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waveform: simulation checks that loop runs multiple times

This commit is contained in:
Peter McGoron 2024-03-03 22:48:58 +00:00
parent 1d85e2307d
commit 525e2a1615
1 changed files with 40 additions and 8 deletions
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46
gateware/rtl/waveform/waveform.cpp
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@ -10,15 +10,21 @@ class WaveformTestbench : public TB<Vwaveform_sim> {
public:
void start_test(int, int, int, bool);
void halt_check(bool);
WaveformTestbench(int _bailout) : TB<Vwaveform_sim>(_bailout) {}
void wait_until_loop_complete();
void check_data();
void clear_recv_data();
WaveformTestbench(int _bailout = 0) : TB<Vwaveform_sim>(_bailout) {}
private:
std::vector<uint32_t> send_words;
std::vector<uint32_t> recv_words;
void fill_data(int num);
void check_data();
void posedge() override;
};
void WaveformTestbench::clear_recv_data() {
recv_words.clear();
}
void WaveformTestbench::posedge() {
if (!mod.ram_finished) {
if ((mod.enable & 0b10) != 0) {
@ -38,6 +44,8 @@ void WaveformTestbench::fill_data(int num) {
auto distrib = std::uniform_int_distribution<uint32_t>(0,(1 << 20) - 1);
send_words.clear();
clear_recv_data();
for (int i = 0; i < num; i++) {
send_words.push_back(distrib(engine));
}
@ -51,7 +59,7 @@ void WaveformTestbench::check_data() {
/* SPI message has an extra bit to access DAC register */
auto was_sent = 1 << 20 | send_words.at(i % len);
if (was_sent != recv_words.at(i % len)) {
std::cout << i << ":" << was_sent << "!=" << recv_words[i % len] << std::endl;
std::cout << i << ":" << std::hex << was_sent << "!=" << std::hex << recv_words[i % len] << std::endl;
std::exit(1);
}
}
@ -86,6 +94,18 @@ void WaveformTestbench::halt_check(bool check_for_finish) {
check_data();
}
void WaveformTestbench::wait_until_loop_complete() {
if (!mod.do_loop)
throw std::logic_error("Need to run with do_loop");
/* wait for the counter to go past the start */
while (!mod.cntr)
run_clock();
/* wait for the counter to return to the start */
while (mod.cntr)
run_clock();
}
WaveformTestbench *tb;
void cleanup() {
@ -95,14 +115,26 @@ void cleanup() {
int main(int argc, char *argv[]) {
Verilated::commandArgs(argc, argv);
Verilated::traceEverOn(true);
tb = new WaveformTestbench(100000);
tb = new WaveformTestbench();
atexit(cleanup);
tb->start_test(64, 14, 20, false);
std::cout << "Running single output tests" << std::endl;
for (int i = 1; i < 5; i++) {
tb->start_test(64*i, 14, 20, false);
tb->halt_check(true);
}
tb->start_test(64, 14, 20, true);
tb->halt_check(false);
std::cout << "run loop tests" << std::endl;
for (int i = 1; i < 5; i++) {
tb->start_test(64*i, 14, 20, true);
/* Check that the code will run multiple times */
for (int j = 0; j < 5; j++) {
tb->wait_until_loop_complete();
tb->check_data();
tb->clear_recv_data();
}
}
return 0;
}