portserial.c
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/*
* FreeModbus Libary: LPC214X Port
* Copyright (C) 2007 Tiago Prado Lone <tiago@maxwellbohr.com.br>
*
* 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: portserial.c,v 1.1 2007/04/24 23:15:18 wolti Exp $
*/
#include "port.h"
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"
/* ----------------------- Start implementation -----------------------------*/
void vMBPortSerialEnable( _BOOL xRxEnable, _BOOL xTxEnable )
{
if(xRxEnable)
{
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
}
else
{
USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
}
if(xTxEnable)
{
USART_ITConfig(USART3, USART_IT_TXE, ENABLE);
}
else
{
USART_ITConfig(USART3, USART_IT_TXE, DISABLE);
}
}
void
vMBPortClose( void )
{
USART_ITConfig(USART3, USART_IT_TXE|USART_IT_RXNE, DISABLE);
USART_Cmd(USART3, DISABLE);
}
_BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
(void)ucPORT; //不修改串口号
(void)ucDataBits; //不修改数据位长度
(void)eParity; //不修改检验格式
// RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD , ENABLE);
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 , ENABLE); //
//
// USART_DeInit(USART3);
// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
// GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
// GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
// //USART3
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
// GPIO_Init(GPIOB, &GPIO_InitStructure);
//
// GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_USART3);
// GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_USART3);
// //
// //配置串口参数
// //
// USART_InitStructure.USART_BaudRate = ulBaudRate; //只修改波特率
// USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// USART_InitStructure.USART_StopBits = USART_StopBits_1;
// USART_InitStructure.USART_Parity = USART_Parity_No;
// USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
// USART_InitStructure.USART_Parity = USART_Mode_Rx | USART_Mode_Tx;
// USART_Init(USART3, &USART_InitStructure);
// //
// //使能串口
// //
// USART_Cmd(USART3, ENABLE);
//
//配置中断优先级
// //
// NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
return TRUE;
}
_BOOL
xMBPortSerialPutByte( CHAR ucByte )
{
USART_SendData(USART3, ucByte);
return TRUE;
}
_BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{
*pucByte = USART_ReceiveData(USART3);
return TRUE;
}
/*
* 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();
}
//串口3
void USART3_IRQHandler(void)
{
if (USART_GetITStatus(USART3, USART_IT_RXNE) == SET)
{
USART_ClearITPendingBit(USART3, USART_IT_RXNE);
prvvUARTRxISR(); //Modbus Uart1 ISR
}
if (USART_GetITStatus(USART3, USART_IT_TXE) == SET)
{
USART_ClearITPendingBit(USART3, USART_IT_TXE);
prvvUARTTxReadyISR(); //Modbus Uart1 ISR
}
}