add modbus slave support

add modbus slave support

components/connectivity/Modbus/porting/TencentOS_Tiny/portserial.c

@@ -0,0 +1,133 @@
+/*
+ * FreeModbus Libary: BARE Port
+ * Copyright (C) 2006 Christian Walter <wolti@sil.at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * File: $Id$
+ */
+
+#include "mod_port.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbport.h"
+#include "mcu_init.h"
+
+extern UART_HandleTypeDef huart2;
+/* ----------------------- static functions ---------------------------------*/
+void prvvUARTTxReadyISR( void );
+void prvvUARTRxISR( void );
+
+/* ----------------------- Start implementation -----------------------------*/
+void
+vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
+{
+  /* If xRXEnable enable serial receive interrupts. If xTxENable enable
+     * transmitter empty interrupts.
+     */
+	if(xRxEnable == TRUE)
+		 __HAL_UART_ENABLE_IT(&huart2, UART_IT_RXNE);
+	else
+		 __HAL_UART_DISABLE_IT(&huart2, UART_IT_RXNE);
+	
+	if(xTxEnable == TRUE)
+		 __HAL_UART_ENABLE_IT(&huart2, UART_IT_TXE);
+	else
+		 __HAL_UART_DISABLE_IT(&huart2, UART_IT_TXE);
+}
+
+BOOL
+xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
+{
+	HAL_UART_DeInit(&huart2);
+	(void)ucPORT;
+	huart2.Instance = USART2;
+    huart2.Init.BaudRate = ulBaudRate;
+
+  
+    huart2.Init.StopBits = UART_STOPBITS_1;
+	switch (eParity)
+  {
+  	case MB_PAR_ODD:
+			huart2.Init.WordLength = UART_WORDLENGTH_9B;
+			huart2.Init.Parity = UART_PARITY_ODD;
+  		break;
+  	case MB_PAR_EVEN:
+			huart2.Init.WordLength = UART_WORDLENGTH_9B;
+			huart2.Init.Parity = UART_PARITY_EVEN;
+  		break;
+  	default:
+			huart2.Init.WordLength = UART_WORDLENGTH_8B;
+			huart2.Init.Parity = UART_PARITY_NONE;
+  		break;
+  }
+  
+  huart2.Init.Mode = UART_MODE_TX_RX;
+  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+  if (HAL_UART_Init(&huart2) != HAL_OK)
+  {
+    return FALSE;
+  }
+
+		return TRUE;
+}
+
+BOOL
+xMBPortSerialPutByte( CHAR ucByte )
+{
+    /* Put a byte in the UARTs transmit buffer. This function is called
+     * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
+     * called. */
+	
+		if(HAL_UART_Transmit(&huart2,(uint8_t*)&ucByte,1,1) == HAL_OK)
+			return TRUE;
+		else
+			return FALSE;
+}
+
+BOOL
+xMBPortSerialGetByte( CHAR * pucByte )
+{
+    /* Return the byte in the UARTs receive buffer. This function is called
+     * by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
+     */
+	if(HAL_UART_Receive(&huart2,(uint8_t*)pucByte,1,1) == HAL_OK)
+    	return TRUE;
+	else
+		return FALSE;
+}
+
+/* Create an interrupt handler for the transmit buffer empty interrupt
+ * (or an equivalent) for your target processor. This function should then
+ * call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
+ * a new character can be sent. The protocol stack will then call 
+ * xMBPortSerialPutByte( ) to send the character.
+ */
+void prvvUARTTxReadyISR( void )
+{
+    pxMBFrameCBTransmitterEmpty(  );
+}
+
+/* Create an interrupt handler for the receive interrupt for your target
+ * processor. This function should then call pxMBFrameCBByteReceived( ). The
+ * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
+ * character.
+ */
+void prvvUARTRxISR( void )
+{
+    pxMBFrameCBByteReceived(  );
+}