diff --git a/cores/arduino/trap_handler.c b/cores/arduino/trap_handler.c
index f756081..5479e39 100644
--- a/cores/arduino/trap_handler.c
+++ b/cores/arduino/trap_handler.c
@@ -26,17 +26,17 @@ void trap_handler(void)
     if (EPIC_CHECK_TIMER16_1())
         tone_interrupt_handler();
 
-    // // uart0 interrupt
-    // if (EPIC_CHECK_UART_0())
-    //     serial_handler_wrapper(0);
+    // uart0 interrupt
+    if (EPIC_CHECK_UART_0())
+        serial_handler_wrapper(0);
 
-    // // uart1 interrupt
-    // if (EPIC_CHECK_UART_1())
-    //     serial_handler_wrapper(1);
+    // uart1 interrupt
+    if (EPIC_CHECK_UART_1())
+        serial_handler_wrapper(1);
         
-    // // i2c interrupt
-    // if (EPIC_CHECK_I2C_1())
-    //     wire_handler_wrapper();
+    // i2c interrupt
+    if (EPIC_CHECK_I2C_1())
+        wire_handler_wrapper();
 
     // reset all interrupts
     HAL_EPIC_Clear(0xFFFFFFFF);
diff --git a/libraries/SoftwareSerial/src/SoftwareSerial.cpp b/libraries/SoftwareSerial/src/SoftwareSerial.cpp
index e107e0d..c11f6d9 100644
--- a/libraries/SoftwareSerial/src/SoftwareSerial.cpp
+++ b/libraries/SoftwareSerial/src/SoftwareSerial.cpp
@@ -29,12 +29,17 @@ http://arduiniana.org.
 // --------- TO LL ---------
 // get ticks from systick
 #define SYSTICK_GET_TICKS()           ((uint64_t)(SCR1_TIMER->MTIMEH)<<32 | SCR1_TIMER->MTIME)
+
 #define GPIO_SET_PIN(GPIO_x, pin)     ((GPIO_x)->SET = (pin))
 #define GPIO_CLEAR_PIN(GPIO_x, pin)   ((GPIO_x)->CLEAR = (pin))
 #define GPIO_READ_PIN(GPIO_x, pin)    (((GPIO_x)->SET & (pin)) != (uint32_t)GPIO_PIN_LOW ? GPIO_PIN_HIGH : GPIO_PIN_LOW)
+
 #define GPIO_IRQ_LINE_ENABLE(lineMask)    ( GPIO_IRQ->ENABLE_SET = (1 << (lineMask >> GPIO_IRQ_LINE_S)) )
 #define GPIO_IRQ_LINE_DISABLE(lineMask)   ( GPIO_IRQ->ENABLE_CLEAR = (1 << (lineMask >> GPIO_IRQ_LINE_S)) )
 #define GPIO_IRQ_CLEAR_ALL()              (GPIO_IRQ->CLEAR = 0b11111111)
+#define GLOBAL_IRQ_DISABLE()    (clear_csr(mie, MIE_MEIE))
+#define GLOBAL_IRQ_ENABLE()     set_csr(mstatus, MSTATUS_MIE); \
+                                set_csr(mie, MIE_MEIE)
 // --------- TO LL ---------
 
 
@@ -288,6 +293,7 @@ void SoftwareSerial::begin(long speed)
 
   tunedDelay(_tx_delay); // if we were low this establishes the end
 
+  // todo убрать
   HAL_GPIO_PinConfig(GPIO_0, GPIO_PIN_8, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
   HAL_GPIO_PinConfig(GPIO_0, GPIO_PIN_1, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
 
@@ -318,7 +324,7 @@ size_t SoftwareSerial::write(uint8_t byte)
   if (_inverse_logic)
     byte = ~byte;
 
-  clear_csr(mie, MIE_MEIE);  // turn off interrupts for a clean txmit
+  GLOBAL_IRQ_DISABLE(); // turn off interrupts for a clean txmit
 
   // Write the start bit
   if (_inverse_logic)
@@ -345,8 +351,7 @@ size_t SoftwareSerial::write(uint8_t byte)
     GPIO_SET_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
 
   // enable interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-  set_csr(mie, MIE_MEIE);
+  GLOBAL_IRQ_ENABLE();
 
   tunedDelay(_tx_delay); // wait stop bit