Remove UART habndling Copy/Paste code

STMUART.cpp

@@ -0,0 +1,100 @@
+/*
+ *   Copyright (c) 2020 by Jonathan Naylor G4KLX
+ *   Copyright (c) 2020 by Geoffrey Merck F4FXL - KC3FRA   
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if defined(STM32F4XX) || defined(STM32F7XX)
+
+#include "STMUART.h"
+
+CSTMUART::CSTMUART() :
+m_usart(NULL)
+{
+
+}
+
+void CSTMUART::init(USART_TypeDef* usart)
+{
+  m_usart = usart;
+}
+
+void CSTMUART::write(const uint8_t * data, uint16_t length)
+{
+  if(length == 0U || m_usart == NULL)
+    return;
+
+
+  m_txFifo.put(data[0]);
+  USART_ITConfig(m_usart, USART_IT_TXE, ENABLE);//switch TX IRQ is on
+
+  for(uint16_t i = 1U; i < length; i++) {
+    m_txFifo.put(data[i]);
+  }
+
+  USART_ITConfig(m_usart, USART_IT_TXE, ENABLE);//make sure TX IRQ is on
+}
+
+uint8_t CSTMUART::read()
+{
+  return m_rxFifo.get();
+}
+
+void CSTMUART::handleIRQ()
+{
+  if(m_usart == NULL)
+    return;
+
+  if (USART_GetITStatus(m_usart, USART_IT_RXNE)) {
+    if(!m_rxFifo.isFull())
+      m_rxFifo.put((uint8_t) USART_ReceiveData(m_usart));
+    USART_ClearITPendingBit(USART1, USART_IT_RXNE);
+  }
+
+  if (USART_GetITStatus(m_usart, USART_IT_TXE)) {
+    if(!m_txFifo.isEmpty())
+      USART_SendData(m_usart, m_txFifo.get());
+
+    USART_ClearITPendingBit(m_usart, USART_IT_TXE);
+
+    if (m_txFifo.isEmpty()) // if there's no more data to transmit then turn off TX interrupts
+      USART_ITConfig(m_usart, USART_IT_TXE, DISABLE);
+  }
+}
+
+  // Flushes the transmit shift register
+// warning: this call is blocking
+void CSTMUART::flush()
+{
+  if(m_usart == NULL)
+    return;
+
+   // wait until the TXE shows the shift register is empty
+   while (USART_GetITStatus(m_usart, USART_FLAG_TXE))
+      ;
+}
+
+uint16_t CSTMUART::available()
+{
+  return m_rxFifo.isEmpty() ? 0U : 1U;
+}
+
+uint16_t CSTMUART::availableForWrite()
+{
+  return m_txFifo.isFull() ? 0U : 1U;
+}
+
+#endif