fix

src/main.c

@@ -13,7 +13,7 @@
 #include "ultrasonic_driver.h"
 
 #define ULTRASONIC_CYCLES     0x05U
-#define ULTRASONIC_TRAN_US    1000  // (ms)
+#define ULTRASONIC_TRAN_US    50  // (ms)
 
 extern uint32_t capture_value;
 
@@ -33,7 +33,7 @@ int main(void)
 
 
     /* ---------- debug start ---------- */
-    ultrasonic_transmit_delay(240);
+    ultrasonic_transmit_delay(250);
     recevice_exti_config();
     ultrasonic_echo_timer_config();