/*
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* FreeModbus Libary: BARE Port
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* Copyright (C) 2006 Christian Walter <wolti@sil.at>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* File: $Id: portserial.c,v 1.1 2006/08/22 21:35:13 wolti Exp $
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*/
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#include "port.h"
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mbport.h"
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#include "RS485.h"
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#include "sizhu_communication_protocol.h"
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/* ----------------------- static functions ---------------------------------*/
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static void prvvUARTTxReadyISR(void);
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static void prvvUARTRxISR(void);
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/* ----------------------- Start implementation -----------------------------*/
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/**
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* @brief ´®¿ÚÊÕ·¢¿ª¹Øº¯Êý
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* @param ÎÞ
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* @retval ÎÞ
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*/
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void vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
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{
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/* If xRXEnable enable serial receive interrupts. If xTxENable enable
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* transmitter empty interrupts.
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*/
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USART_ITConfig(UARTNUM,USART_IT_RXNE,(xRxEnable==TRUE)?ENABLE:DISABLE);
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USART_ITConfig(UARTNUM,USART_IT_TXE,(xTxEnable==TRUE)?ENABLE:DISABLE);
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}
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/**
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* @brief ´®¿Ú³õʼ»¯º¯Êý
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* @param ÎÞ
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* @retval ״̬±êÖ¾
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*/
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BOOL xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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DMA_InitTypeDef DMA_InitStructure;
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//ʹÄÜGPIOºÍUARTʱÖÓ
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RCC_APB2PeriphClockCmd(APB_GPIO_GROUP , ENABLE);
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RCC_APB1PeriphClockCmd( RCC_APB_Periph_UART, ENABLE);
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USART_DeInit(UARTNUM);
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GPIO_InitStructure.GPIO_Pin = V_RS485_TXD_EN_PIN_NUM;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(V_RS485_TXD_EN_PIN_GROUP, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = V_RS485_RXD_EN_PIN_NUM;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(V_RS485_RXD_EN_PIN_GROUP, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = V_RS485_CON_EN_PIN_NUM;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(V_RS485_CON_EN_PIN_GROUP, &GPIO_InitStructure);
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//³õʼ»¯USART
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USART_InitStructure.USART_BaudRate = ulBaudRate;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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//È·¶¨Ð£Ñ鷽ʽ
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if(eParity == MB_PAR_NONE)
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{
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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}
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else if(eParity == MB_PAR_ODD)
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{
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USART_InitStructure.USART_Parity = USART_Parity_Odd;
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USART_InitStructure.USART_WordLength = USART_WordLength_9b;
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}
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else
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{
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USART_InitStructure.USART_Parity = USART_Parity_Even;
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USART_InitStructure.USART_WordLength = USART_WordLength_9b;
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}
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USART_Init(UARTNUM, &USART_InitStructure);
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//******************************************************************************************//
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RCC_AHBPeriphClockCmd(RCC_AHB_Preiph_UART_DMA, ENABLE);
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DMA_DeInit(DMA_RS485_Channel);
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DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)(&(UARTNUM->DR)) ; /*ÉèÖÃDMAÔ´£º´®¿ÚÊý¾Ý¼Ä´æÆ÷µØÖ·*/
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DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(rs485_receive_g.RS485_BUF);/*ÄÚ´æµØÖ·(Òª´«ÊäµÄ±äÁ¿µÄÖ¸Õë)*/
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;/*·½Ïò£º´ÓË«Ïòµ½ÄÚ´æ*/
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DMA_InitStructure.DMA_BufferSize = REC_LENGTH;/*´«Êä´óСDMA_BufferSize=SENDBUFF_SIZE*/
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;/*ÍâÉèµØÖ·²»Ôö*/
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; /*ÄÚ´æµØÖ·×ÔÔö*/
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;/*ÍâÉèÊý¾Ýµ¥Î»*/
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; /*ÄÚ´æÊý¾Ýµ¥Î» 8bit*/
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//DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; /*DMAģʽ£º²»¶ÏÑ»·*/
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DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; /*ÓÅÏȼ¶£ºÖÐ*/
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;/*½ûÖ¹ÄÚ´æµ½ÄÚ´æµÄ´«Êä */
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DMA_Init(DMA_RS485_Channel, &DMA_InitStructure);
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USART_DMACmd(UARTNUM, USART_DMAReq_Rx, ENABLE);
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DMA_Cmd(DMA_RS485_Channel, ENABLE);
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//*********************************************************************************************//
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USART_Cmd(UARTNUM, ENABLE);
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//USARTÖжÏÓÅÏȼ¶ÅäÖà ¹Ø±Õ´®¿ÚʹÄÜ
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// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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/* NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
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NVIC_Init(&NVIC_InitStructure);*/
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//
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USART_ClearITPendingBit(UARTNUM, USART_IT_TC);//Çå³ýTC±êÖ¾
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USART_ClearFlag(UARTNUM, USART_FLAG_TC);
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//¿ªÆôTX DMA
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// RS485_TXDMA_Init(log_send_buffer,SEND_BUFFER_LENGTH);
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V_RS485_EN_LOW;
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return TRUE;
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}
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/**
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* @brief Êä³öÊý¾Ýº¯Êý
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* @param ÎÞ
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* @retval ÎÞ
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*/
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BOOL xMBPortSerialPutByte( CHAR ucByte )
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{
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extern u8 RS485_status,BT_status;
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/* Put a byte in the UARTs transmit buffer. This function is called
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* by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
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* called. */
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if(RS485_status)
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{
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V_RS485_EN_HIGH;
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//while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);
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USART_SendData(UARTNUM,ucByte);
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while(USART_GetFlagStatus(UARTNUM, USART_FLAG_TC) == RESET);
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V_RS485_EN_LOW;
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}
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else
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if(BT_status)
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{
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//while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);
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USART_SendData(UARTNUM,ucByte);
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while(USART_GetFlagStatus(UARTNUM, USART_FLAG_TC) == RESET);
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}
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return TRUE;
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}
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/**
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* @brief ½ÓÊÕÊý¾Ýº¯Êý
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* @param ÎÞ
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* @retval Íê³É״̬
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*/
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BOOL xMBPortSerialGetByte( CHAR * pucByte )
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{
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/* Return the byte in the UARTs receive buffer. This function is called
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* by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
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*/
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*pucByte=USART_ReceiveData(UARTNUM);
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return TRUE;
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}
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/* Create an interrupt handler for the transmit buffer empty interrupt
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* (or an equivalent) for your target processor. This function should then
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* call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
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* a new character can be sent. The protocol stack will then call
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* xMBPortSerialPutByte( ) to send the character.
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*/
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static void prvvUARTTxReadyISR(void)
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{
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pxMBFrameCBTransmitterEmpty();
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}
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/* Create an interrupt handler for the receive interrupt for your target
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* processor. This function should then call pxMBFrameCBByteReceived( ). The
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* protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
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* character.
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*/
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static void prvvUARTRxISR(void)
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{
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pxMBFrameCBByteReceived();
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}
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/**
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* @brief ´®¿ÚÖжϺ¯Êý
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* @param ÎÞ
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* @retval ÎÞ
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*/
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void UART4_IRQHandler(void)
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{
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//½ÓÊÕÖжÏ
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if(USART_GetITStatus(UARTNUM, USART_IT_RXNE)!=RESET)
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{
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// prvvUARTRxISR();
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//Çå³ýÖжϱêÖ¾
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USART_ClearITPendingBit(UARTNUM, USART_IT_RXNE);
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}
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//·¢ËÍÍê³ÉÖжÏ
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if(USART_GetITStatus(UARTNUM, USART_IT_TXE)!=RESET)
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{
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// prvvUARTTxReadyISR();
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//Çå³ýÖжϱêÖ¾
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USART_ClearITPendingBit(UARTNUM, USART_IT_TXE);
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}
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}
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