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Add configurable clk signal name #48

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

Add configurable clk signal name #48

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3 changes: 3 additions & 0 deletions cmake/testbench.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,9 @@ macro(add_testbench)

get_all_sources_recursive(lib${TARGET} ${TARGET}_SOURCES)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# Create the test executable
add_executable(${TARGET} ${ARG_BENCH_DIR}/${ARG_MODULE}/${TARGET}.cpp)
if(ARG_DEPENDS)
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21 changes: 18 additions & 3 deletions include/testbench.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@
* along with ECAP5-DTESTLIB. If not, see <http://www.gnu.org/licenses/>.
*/

#include <cstdlib>

#ifndef TESTBENCH_H
#define TESTBENCH_H

Expand Down Expand Up @@ -50,6 +52,7 @@ template<class Module> class Testbench {
int * err_cycles;
int cycle;

uint8_t * clk_ptr;
uint64_t clk_period_in_ps;

Testbench() {
Expand All @@ -63,6 +66,13 @@ template<class Module> class Testbench {
this->conditions = NULL;
this->err_cycles = NULL;
this->cycle = 0;

// Only configure the clk pointer if clk_i exists
if constexpr(requires {this->core->clk_i;}) {
this->clk_ptr = &this->core->clk_i;
} else {
this->clk_ptr = NULL;
}
}

~Testbench() {
Expand Down Expand Up @@ -106,13 +116,18 @@ template<class Module> class Testbench {
}

void tick() {
core->clk_i = 1;
if(this->clk_ptr == NULL) {
printf("ERROR: clk_i not found. If the clk signal is named differently, define clk_ptr\n");
std::exit(-1);
}

*this->clk_ptr = 1;
core->eval();
if(this->trace) {
this->trace->dump(this->clk_period_in_ps * this->tickcount + (this->clk_period_in_ps / 10));
}

core->clk_i = 0;
*this->clk_ptr = 0;
core->eval();
if(this->trace) {
this->trace->dump(this->clk_period_in_ps * this->tickcount + (this->clk_period_in_ps / 2));
Expand All @@ -122,7 +137,7 @@ template<class Module> class Testbench {
this->tickcount += 1;
this->cycle += 1;

core->clk_i = 1;
*this->clk_ptr = 1;
core->eval();
if(this->trace) {
this->trace->dump(this->clk_period_in_ps * this->tickcount);
Expand Down