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Fix false ok in baudrate tests #31

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Merged
cchaine merged 1 commit into from
Dec 27, 2025
Merged

Fix false ok in baudrate tests #31

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28 changes: 22 additions & 6 deletions tests/benches/tx_frontend/tb_tx_frontend.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -89,9 +89,15 @@ class TB_Tx_frontend : public Testbench<Vtb_tx_frontend> {
}

float get_generated_baudrate(uint32_t baudrate) {
this->reset();
this->_nop();

this->core->rst_i = 1;
for(int i = 0; i < 5; i++) {
this->tick();
}
this->core->rst_i = 0;

core->cr_acc_incr_i = ((double)baudrate * (1 << 16)) / 24000000;
core->cr_acc_incr_i = ((double)baudrate * (1 << 16)) / 60000000;
core->cr_ds_i = 1;
core->cr_p_i = 1;
core->cr_s_i = 1;
Expand All @@ -115,7 +121,7 @@ class TB_Tx_frontend : public Testbench<Vtb_tx_frontend> {
}

// Compute the baudrate
float duration = (counter / 24000000.0);
float duration = (counter / 60000000.0);
float baud_period = duration / 12;
float generated_baudrate = (1.0 / baud_period);
return generated_baudrate;
Expand Down Expand Up @@ -2777,10 +2783,20 @@ void tb_tx_frontend_baudrate(TB_Tx_frontend * tb) {
float generated_baudrate = tb->get_generated_baudrate(baudrates[i]);
float precision = (1.0 - (generated_baudrate / baudrates[i]));

if(tb->debug_log) {
printf("Baudrate: %d, acc: %d, precision: %f -> ", baudrates[i], core->cr_acc_incr_i, precision);

if(precision >= 0.02) {
printf("BAD\n");
} else {
printf("OK\n");
}
}

//`````````````````````````````````
// Checks

tb->check(COND_baudrate, (precision < 0.01));
tb->check(COND_baudrate, (precision < 0.02));
}

//`````````````````````````````````
Expand All @@ -2803,8 +2819,8 @@ int main(int argc, char ** argv, char ** env) {
tb->set_debug_log(verbose);
tb->init_conditions(__CondIdEnd);

// 24MHz
tb->clk_period_in_ps = 41667;
// 60MHz
tb->clk_period_in_ps = 16667;

/************************************************************/

Expand Down
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