объект создается, begin проходит, write срабатывает, биты правильные, с таймингами беда. получение не пробовала

libraries/SoftwareSerial/src/SoftwareSerial.cpp

@@ -202,7 +202,7 @@ void SoftwareSerial::recv()
 
 uint8_t SoftwareSerial::rx_pin_read()
 {
-  return (uint8_t)HAL_GPIO_ReadPin((GPIO_TypeDef *)_receivePortRegister, (HAL_PinsTypeDef)_receivePin);
+  return (uint8_t)HAL_GPIO_ReadPin((GPIO_TypeDef *)_receivePortRegister, (HAL_PinsTypeDef)_receiveBitMask);
 }
 
 //
@@ -236,8 +236,8 @@ SoftwareSerial::SoftwareSerial(uint8_t receivePin, uint8_t transmitPin, bool inv
   _buffer_overflow(false),
   _inverse_logic(inverse_logic)
 {
-  setTX(transmitPin);
+  _transmitPin = transmitPin;
-  setRX(receivePin);
+  _receivePin = receivePin;
 }
 
 //
@@ -250,12 +250,9 @@ SoftwareSerial::~SoftwareSerial()
 
 void SoftwareSerial::setTX(uint8_t tx)
 {
-  // First write, then set output. If we do this the other way around,
+  // First configure then write because writing pin didn't work until config is applied
-  // the pin would be output low for a short while before switching to
-  // output high. Now, it is input with pullup for a short while, which
-  // is fine. With inverse logic, either order is fine.
-  digitalWrite(tx, _inverse_logic ? LOW : HIGH); // todo проверить, что правда выставляется до конфигурации
   pinMode(tx, OUTPUT);
+  digitalWrite(tx, _inverse_logic ? LOW : HIGH);
   _transmitBitMask = (uint16_t)digitalPinToBitMask(tx);   // save tx bit mask
   _transmitPortRegister = (uint32_t)digitalPinToPort(tx); // save tx port adress
 }
@@ -266,7 +263,6 @@ void SoftwareSerial::setRX(uint8_t rx)
     pinMode(rx, INPUT_PULLUP);  // pullup for normal logic
   else
     pinMode(rx, INPUT);
-  _receivePin = rx; // save rx digital pin number
   _receiveBitMask = (uint16_t)digitalPinToBitMask(rx);    // save rx bit mask
   _receivePortRegister = (uint32_t)digitalPinToPort(rx);  // save rx port adress
 }
@@ -284,6 +280,10 @@ uint16_t SoftwareSerial::subtract_cap(uint16_t num, uint16_t sub)
 //
 void SoftwareSerial::begin(long speed)
 {
+  // set pins config
+  setRX(_receivePin);
+  setTX(_transmitPin);
+  
   _rx_delay_centering = _rx_delay_intrabit = _rx_delay_stopbit = _tx_delay = 0;
 
   // limit speed
@@ -357,6 +357,8 @@ void SoftwareSerial::begin(long speed)
 
     tunedDelay(_tx_delay); // if we were low this establishes the end
   }
+  else
+    ErrorMsgHandler("SoftwareSerial.begin(): Rx pin does not support interrupts, use different pin");
 
 // #if _DEBUG
 //   pinMode(_DEBUG_PIN1, OUTPUT);
@@ -430,12 +432,9 @@ size_t SoftwareSerial::write(uint8_t byte)
 
   // Write the start bit
   if (inv)
-  // todo проверить, можно ли так выставлять через адрес порта
     HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_HIGH);
-    // *reg |= reg_mask; // бит tx в 1
   else
     HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_LOW);
-    // *reg &= inv_mask; // бит tx в 0
 
   tunedDelay(delay);
 
@@ -443,10 +442,8 @@ size_t SoftwareSerial::write(uint8_t byte)
   for (uint8_t i = 8; i > 0; --i)
   {
     if (byte & 1) // choose bit
-      // *reg |= reg_mask; // send 1
       HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_HIGH);
     else
-      // *reg &= inv_mask; // send 0
       HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_LOW);
 
     tunedDelay(delay);
@@ -456,10 +453,8 @@ size_t SoftwareSerial::write(uint8_t byte)
   // restore pin to natural state
   if (inv)
     HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_LOW);
-    // *reg &= inv_mask; // бит tx в 0
   else
     HAL_GPIO_WritePin((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)bit_mask, GPIO_PIN_HIGH);
-    // *reg |= reg_mask; // бит tx в 1
 
   interrupts(); // enable interrupts
   tunedDelay(_tx_delay);

libraries/SoftwareSerial/src/SoftwareSerial.h

@@ -43,6 +43,7 @@ private:
   uint8_t _receivePin;
   uint16_t _receiveBitMask;
   uint32_t _receivePortRegister;
+  uint8_t _transmitPin;
   uint16_t _transmitBitMask;
   uint32_t _transmitPortRegister;
   uint8_t _int_maskMux;