diff --git a/G4:G431/CORDIC/commproto.cpp b/G4:G431/CORDIC/commproto.cpp
index 1337253..6d071fa 100644
--- a/G4:G431/CORDIC/commproto.cpp
+++ b/G4:G431/CORDIC/commproto.cpp
@@ -165,7 +165,7 @@ static errcodes_t cmd_testm(const char*, char *args){
         ok = false;
     }
     if(!ok) return ERR_BADVAL;
-    SEND("TIME=");
+    SEND("TIMEus=");
     SEND(u2str(elapsed));
     SEND("\n");
     return ERR_AMOUNT;
@@ -193,7 +193,7 @@ static errcodes_t cmd_testc(const char*, char *args){
         ok = false;
     }
     if(!ok) return ERR_BADVAL;
-    SEND("TIME=");
+    SEND("TIMEus=");
     SEND(u2str(elapsed));
     SEND("\n");
     return ERR_AMOUNT;
diff --git a/G4:G431/CORDIC/cordic.bin b/G4:G431/CORDIC/cordic.bin
index 9f5d601..eea0d95 100755
Binary files a/G4:G431/CORDIC/cordic.bin and b/G4:G431/CORDIC/cordic.bin differ
diff --git a/G4:G431/CORDIC/hardware.c b/G4:G431/CORDIC/hardware.c
index 50b2a2b..3d3edd1 100644
--- a/G4:G431/CORDIC/hardware.c
+++ b/G4:G431/CORDIC/hardware.c
@@ -28,24 +28,24 @@ void sys_tick_handler(){
 }
 
 static void timer_setup(){
-    RCC->APB1ENR1 |= RCC_APB1ENR1_TIM2EN;
+    RCC->APB1ENR1 |= RCC_APB1ENR1_TIM3EN;
     __DSB();
-    TIM2->PSC = 84;             // 85 MHz / 85 = 1 MHz
-    TIM2->ARR = 0xFFFFFFFF;     // 32-bit auto-reload (maximum)
-    TIM2->CR1 = 0;              // disable counter
+    TIM3->CR1 = 0;              // disable counter
+    TIM3->PSC = 84;             // 85 MHz / 85 = 1 MHz
+    TIM3->ARR = 0xFFFFFFFF;     // 32-bit auto-reload (maximum)
 }
 
 void timer_start(){
-    TIM2->CNT = 0;
-    TIM2->CR1 |= TIM_CR1_CEN;
+    TIM3->CNT = 0;
+    TIM3->CR1 = TIM_CR1_CEN;
 }
 
 void timer_stop(){
-    TIM2->CR1 = 0;
+    TIM3->CR1 = 0;
 }
 
 uint32_t timer_read(){
-    return TIM2->CNT;
+    return TIM3->CNT;
 }
 
 void gpio_setup(){
@@ -62,7 +62,7 @@ void gpio_setup(){
     // count milliseconds
     SysTick_Config(SysFreq / 1000);
 
-    // Setup TIM2 for microsecond counting
+    // Setup TIM3 for microsecond counting
     timer_setup();
 }
 
diff --git a/G4:G431/CORDIC/main.c b/G4:G431/CORDIC/main.c
index 3fed459..9edc614 100644
--- a/G4:G431/CORDIC/main.c
+++ b/G4:G431/CORDIC/main.c
@@ -21,6 +21,7 @@
 
 #include "commproto.h"
 #include "hardware.h"
+#include "strfunc.h"
 #include "usart.h"
 
 // 40ms for debouncing
@@ -33,6 +34,7 @@ int main(void){
     usart_setup(115200);
     bool pressed = false;
     uint32_t Tblink = 0, Tkey = 0; // blink and key pressed time
+    uint32_t Tpressed = 0;
     while(1){
         USART_flags_t f = usart_process();
         if(f.rxovrfl) usart_sendstr("Rx buffer overflow!\n");
@@ -50,12 +52,19 @@ int main(void){
             if(!pressed){ // new event
                 pressed = true;
                 usart_sendstr("Key pressed\n");
+                timer_start();
+                Tpressed = Tms;
             }
             Tkey = Tms;
         }else{ // key released
             if(pressed && (Tms - Tkey) > TDEBOUNCE){ // wait for debounce
+                timer_stop();
+                uint32_t micros = timer_read();
+                uint32_t millis = Tms - Tpressed;
                 pressed = false;
                 usart_sendstr("Key released\n");
+                usart_sendstr("Tms="); usart_sendstr(u2str(millis));
+                usart_sendstr("\nTus="); usart_sendstr(u2str(micros)); usart_sendstr("\n");
             }
         }
     }
diff --git a/G4:G431/CORDIC/test.c b/G4:G431/CORDIC/test.c
index 59b1412..aae3602 100644
--- a/G4:G431/CORDIC/test.c
+++ b/G4:G431/CORDIC/test.c
@@ -27,6 +27,9 @@
 // amount of iterations over test
 #define N_TESTS     1000
 
+static float arr[N_TESTS];
+
+
 // RNG
 static uint32_t rand_state = 123456789;
 static uint32_t next_rand(void){
@@ -35,35 +38,34 @@ static uint32_t next_rand(void){
 }
 
 // fill array with random angles
-static void fill_random_sin_cos(float *arr){
+static void fill_random_sin_cos(){
     for(int i = 0; i < N_TESTS; ++i){
         // angle from -pi to +pi
         arr[i] = (float)(next_rand() % 62831853) / 10000000.0f - 3.14159265f;
     }
 }
 
-static void fill_random_atan(float *arr){
+static void fill_random_atan(){
     for(int i = 0; i < N_TESTS; ++i){
         arr[i] = (float)(next_rand() % 2000000) / 1e6f - 1e6f; // [-1,1]
     }
 }
 
-static void fill_random_sqrt(float *arr){
+static void fill_random_sqrt(){
     for(int i = 0; i < N_TESTS; ++i){
         arr[i] = (float)(next_rand() % 10000) / 100.0f; // [0,100]
     }
 }
 
-static void fill_random_log(float *arr){
+static void fill_random_log(){
     for(int i = 0; i < N_TESTS; ++i){
         arr[i] = (float)(next_rand() % 10000 + 1) / 100.0f; // [0.01, 100]
     }
 }
 
 // main test template
-static uint32_t run_test(void (*gen)(float*), float (*func)(float)){
-    float arr[N_TESTS];
-    gen(arr);
+static uint32_t run_test(void (*gen)(), float (*func)(float)){
+    gen();
     volatile float result = 0.0f; // don't let gcc to optimize this cycle
     timer_start();
     for(int i = 0; i < N_TESTS; ++i){
diff --git a/G4:G431/CORDIC/version.inc b/G4:G431/CORDIC/version.inc
index 4841fb4..d8c9689 100644
--- a/G4:G431/CORDIC/version.inc
+++ b/G4:G431/CORDIC/version.inc
@@ -1,2 +1,2 @@
-#define BUILD_NUMBER "6"
+#define BUILD_NUMBER "19"
 #define BUILD_DATE "2026-08-04"