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问
哪位用ARM做过用IO口模拟过串口中!
怎么做啊, 答 1: 我原来做过一个原来用51做过一个,不过只有发送没有接收
不过加上接收也不难
需要一个外部中断
你要的话可以传给你一个
eaivip@hotmail.com 答 2: 使用定时器匹配输出!挺好用!定时器的管脚组TXD,以前我只做了个发送。
原理:
波特率决定定时器的定时长度。
软件中,判断下一个位是1 or 0,然后设置匹配时的输出即可! 答 3: 两个不够用?不如用硬件来实现好。 答 4: 我也在LPC2114上用过用的话给你传一个
我的是zhangjj_0225@163.com 答 5: 用LPC3132做了个16串口的通信程序
//定时器 26us(9600bps)或416us(1200bps)
void Timer1(void)
{
static unsigned char ucTimer1Loop=0;
Rev485Byte16Comm(ucTimer1Loop);
if(ucTimer1Loop==0)
Send485Byte16Comm();
ucTimer1Loop++;
if(ucTimer1Loop>=3)
ucTimer1Loop=0;
}
//接收一个字节
void Rev485Byte(unsigned char ucTimeNum,unsigned char ucStart485Pos,unsigned char uc485Num)
{
unsigned char i;
//当有数据发送时,关闭接收功能
uc485Num+=ucStart485Pos;
if((str485SendByte.ucSendByteFlag[ucStart485Pos]==EMPTY_IRQ_FALG)
&&(str485send[ucStart485Pos].uc485Send_Tail_P==str485send[ucStart485Pos].uc485Send_Head_P))
{
for(i=ucStart485Pos;i<uc485Num;i++)
{
if(str485RevByte.ucTime[i]==NO_REV_FLAG&&str485RevByte.ucPinFlag[i]==0)
{
str485RevByte.ucTime[i]=ucTimeNum+1;
if(str485RevByte.ucTime[i]>=3)
str485RevByte.ucTime[i]=0;
}
else if(str485RevByte.ucTime[i]==ucTimeNum)
{
str485RevByte.ucBitPos[i]++;
if(str485RevByte.ucBitPos[i]<2)
{
if(str485RevByte.ucPinFlag[i]!=0)
{
str485RevByte.ucTime[i]=NO_REV_FLAG;
str485RevByte.ucBitPos[i]=0;
}
}
else if(str485RevByte.ucBitPos[i]<10)
{
str485RevByte.ucRevByte[i]>>=1;
if(str485RevByte.ucPinFlag[i])
str485RevByte.ucRevByte[i]|=0x80;
}
else if(str485RevByte.ucBitPos[i]>=11)
{
if(str485RevByte.ucPinFlag[i])
{
str485rev[i].uc485RevBuff[str485rev][i].uc485Rev_Head_P]=str485RevByte.ucRevByte[i];
str485rev[i].uc485Rev_Head_P+=1;
if(str485rev[i].uc485Rev_Head_P>=Maxn485RevLen)
str485rev[i].uc485Rev_Head_P=0;
}
// str485RevByte.ucRevByteFlag[i]=RET_SUCCESS;
str485RevByte.ucTime[i]=NO_REV_FLAG;
str485RevByte.ucBitPos[i]=0;
}
}
}
}
}
//发送一个字节
void Send485Byte(unsigned char ucStart485Pos,unsigned char uc485Num)
{
unsigned char i,ucTemp;
uc485Num+=ucStart485Pos;
for(i=ucStart485Pos;i<uc485Num;i++)
{
//将要发送的字节送入发送寄存器
if((str485SendByte.ucSendByteFlag[i]==EMPTY_IRQ_FALG)&&(str485send[i].uc485Send_Tail_P<str485send[i].uc485Send_Head_P))
{
ucTemp=str485send[i].uc485SendBuff[str485send][i].uc485Send_Tail_P];
str485SendByte.usSendByte[i]=(unsigned short)ucTemp;
if(EvenOdd(ucTemp))
str485SendByte.usSendByte[i]|=0x0100;
str485SendByte.ucSendByteFlag[i]=HAVE_IRQ_FALG;
str485send[i].uc485Send_Tail_P++;
}
//发一10位数据
str485SendByte.ucPinFlag[i]=1;
if(str485SendByte.ucSendByteFlag[i]==HAVE_IRQ_FALG)
{
if(str485SendByte.ucBitPos[i]==NO_SEND_FLAG)
{
str485SendByte.ucBitPos[i]=0;
str485SendByte.ucPinFlag[i]=0;
}
else if(str485SendByte.ucBitPos[i]<9)
{
if((str485SendByte.usSendByte[i]&0x0001)==0x0000)
str485SendByte.ucPinFlag[i]=0;
str485SendByte.usSendByte[i]>>=1;
str485SendByte.ucBitPos[i]++;
}
else
{
str485SendByte.ucPinFlag[i]=1;
str485SendByte.ucBitPos[i]=NO_SEND_FLAG;
str485SendByte.ucSendByteFlag[i]=EMPTY_IRQ_FALG;
}
}
}
}
//奇偶校验
unsigned char EvenOdd(unsigned char ucTemp)
{
unsigned char ucRet;
ucRet=0;
if(table_odd_even_bit[ucTemp&0x0F])
ucRet=1;
if(table_odd_even_bit[ucTemp>>4])
ucRet++;
ucRet&=0x01;
return ucRet;
}
///////////////////////////////////
//从1,2路接收一个字节
void Rev485Byte16Comm(unsigned char ucTimeNum)
{
unsigned int uiPIN0Value,uiPIN1Value;
uiPIN0Value = IO0PIN;
uiPIN1Value = IO1PIN;
if(uiPIN0Value&PIN_RX1)
str485RevByte.ucPinFlag[0]=1;
else
str485RevByte.ucPinFlag[0]=0;
if( uiPIN1Value &PIN_RX2)
str485RevByte.ucPinFlag[1]=1;
else
str485RevByte.ucPinFlag[1]=0;
//从3,4路接收一个字节
if(uiPIN0Value&PIN0_RX3)
str485RevByte.ucPinFlag[2]=1;
else
str485RevByte.ucPinFlag[2]=0;
if( uiPIN1Value &PIN1_RX4)
str485RevByte.ucPinFlag[3]=1;
else
str485RevByte.ucPinFlag[3]=0;
//从5,6路接收一个字节
if(uiPIN0Value&PIN0_RX5)
str485RevByte.ucPinFlag[4]=1;
else
str485RevByte.ucPinFlag[4]=0;
if( uiPIN1Value &PIN1_RX6)
str485RevByte.ucPinFlag[5]=1;
else
str485RevByte.ucPinFlag[5]=0;
//从7,8路接收一个字节
if(uiPIN1Value&PIN1_RX7)
str485RevByte.ucPinFlag[6]=1;
else
str485RevByte.ucPinFlag[6]=0;
if( uiPIN0Value &PIN0_RX8)
str485RevByte.ucPinFlag[7]=1;
else
str485RevByte.ucPinFlag[7]=0;
//从9,10路接收一个字节
if(uiPIN1Value&PIN1_RX9)
str485RevByte.ucPinFlag[8]=1;
else
str485RevByte.ucPinFlag[8]=0;
if( uiPIN0Value &PIN0_RX10)
str485RevByte.ucPinFlag[9]=1;
else
str485RevByte.ucPinFlag[9]=0;
//从11,12路接收一个字节
if(uiPIN1Value&PIN1_RX11)
str485RevByte.ucPinFlag[10]=1;
else
str485RevByte.ucPinFlag[10]=0;
if( uiPIN0Value &PIN0_RX12)
str485RevByte.ucPinFlag[11]=1;
else
str485RevByte.ucPinFlag[11]=0;
//从13,14路接收一个字节
if(uiPIN1Value&PIN1_RX13)
str485RevByte.ucPinFlag[12]=1;
else
str485RevByte.ucPinFlag[12]=0;
if( uiPIN1Value &PIN1_RX14)
str485RevByte.ucPinFlag[13]=1;
else
str485RevByte.ucPinFlag[13]=0;
//从15,16路接收一个字节
if(uiPIN0Value&PIN0_RX15)
str485RevByte.ucPinFlag[14]=1;
else
str485RevByte.ucPinFlag[14]=0;
if( uiPIN1Value &PIN1_RX16)
str485RevByte.ucPinFlag[15]=1;
else
str485RevByte.ucPinFlag[15]=0;
Rev485Byte(ucTimeNum,0,16);
}
//向485发送一个字节
void Send485Byte16Comm(void)
{
Send485Byte(0,16);
if(str485SendByte.ucPinFlag[0]==0)
IO0CLR = PIN_TX1;
else
IO0SET =PIN_TX1;
if(str485SendByte.ucPinFlag[1]==0)
IO1CLR = PIN_TX2;
else
IO1SET =PIN_TX2;
//向3,4路485发送一个字节
if(str485SendByte.ucPinFlag[2]==0)
IO0CLR = PIN0_TX3;
else
IO0SET =PIN0_TX3;
if(str485SendByte.ucPinFlag[3]==0)
IO0CLR = PIN0_TX4;
else
IO0SET =PIN0_TX4;
//向5,6路485发送一个字节
if(str485SendByte.ucPinFlag[4]==0)
IO0CLR = PIN0_TX5;
else
IO0SET =PIN0_TX5;
if(str485SendByte.ucPinFlag[5]==0)
IO0CLR = PIN0_TX6;
else
IO0SET =PIN0_TX6;
//向7,7路485发送一个字节
if(str485SendByte.ucPinFlag[6]==0)
IO0CLR = PIN0_TX7;
else
IO0SET =PIN0_TX7;
if(str485SendByte.ucPinFlag[7]==0)
IO0CLR = PIN0_TX8;
else
IO0SET =PIN0_TX8;
//从9,10路接收一个字节
if(str485SendByte.ucPinFlag[8]==0)
IO0CLR = PIN0_TX9;
else
IO0SET =PIN0_TX9;
if(str485SendByte.ucPinFlag[9]==0)
IO0CLR = PIN0_TX10;
else
IO0SET =PIN0_TX10;
//向11,12路485发送一个字节
if(str485SendByte.ucPinFlag[10]==0)
IO0CLR = PIN0_TX11;
else
IO0SET =PIN0_TX11;
if(str485SendByte.ucPinFlag[11]==0)
IO0CLR = PIN0_TX12;
else
IO0SET =PIN0_TX12;
//向13,14路485发送一个字节
if(str485SendByte.ucPinFlag[12]==0)
IO0CLR = PIN0_TX13;
else
IO0SET =PIN0_TX13;
if(str485SendByte.ucPinFlag[13]==0)
IO0CLR = PIN0_TX14;
else
IO0SET =PIN0_TX14;
//向15,16路485发送一个字节
if(str485SendByte.ucPinFlag[14]==0)
IO0CLR = PIN0_TX15;
else
IO0SET =PIN0_TX15;
if(str485SendByte.ucPinFlag[15]==0)
IO0CLR = PIN0_TX16;
else
IO0SET =PIN0_TX16;
}
答 6: 好代码~~学习 答 7: 看看我的串口驱动,硬件的软件的扩展的,统一接口
怎么做啊, 答 1: 我原来做过一个原来用51做过一个,不过只有发送没有接收
不过加上接收也不难
需要一个外部中断
你要的话可以传给你一个
eaivip@hotmail.com 答 2: 使用定时器匹配输出!挺好用!定时器的管脚组TXD,以前我只做了个发送。
原理:
波特率决定定时器的定时长度。
软件中,判断下一个位是1 or 0,然后设置匹配时的输出即可! 答 3: 两个不够用?不如用硬件来实现好。 答 4: 我也在LPC2114上用过用的话给你传一个
我的是zhangjj_0225@163.com 答 5: 用LPC3132做了个16串口的通信程序
//定时器 26us(9600bps)或416us(1200bps)
void Timer1(void)
{
static unsigned char ucTimer1Loop=0;
Rev485Byte16Comm(ucTimer1Loop);
if(ucTimer1Loop==0)
Send485Byte16Comm();
ucTimer1Loop++;
if(ucTimer1Loop>=3)
ucTimer1Loop=0;
}
//接收一个字节
void Rev485Byte(unsigned char ucTimeNum,unsigned char ucStart485Pos,unsigned char uc485Num)
{
unsigned char i;
//当有数据发送时,关闭接收功能
uc485Num+=ucStart485Pos;
if((str485SendByte.ucSendByteFlag[ucStart485Pos]==EMPTY_IRQ_FALG)
&&(str485send[ucStart485Pos].uc485Send_Tail_P==str485send[ucStart485Pos].uc485Send_Head_P))
{
for(i=ucStart485Pos;i<uc485Num;i++)
{
if(str485RevByte.ucTime[i]==NO_REV_FLAG&&str485RevByte.ucPinFlag[i]==0)
{
str485RevByte.ucTime[i]=ucTimeNum+1;
if(str485RevByte.ucTime[i]>=3)
str485RevByte.ucTime[i]=0;
}
else if(str485RevByte.ucTime[i]==ucTimeNum)
{
str485RevByte.ucBitPos[i]++;
if(str485RevByte.ucBitPos[i]<2)
{
if(str485RevByte.ucPinFlag[i]!=0)
{
str485RevByte.ucTime[i]=NO_REV_FLAG;
str485RevByte.ucBitPos[i]=0;
}
}
else if(str485RevByte.ucBitPos[i]<10)
{
str485RevByte.ucRevByte[i]>>=1;
if(str485RevByte.ucPinFlag[i])
str485RevByte.ucRevByte[i]|=0x80;
}
else if(str485RevByte.ucBitPos[i]>=11)
{
if(str485RevByte.ucPinFlag[i])
{
str485rev[i].uc485RevBuff[str485rev][i].uc485Rev_Head_P]=str485RevByte.ucRevByte[i];
str485rev[i].uc485Rev_Head_P+=1;
if(str485rev[i].uc485Rev_Head_P>=Maxn485RevLen)
str485rev[i].uc485Rev_Head_P=0;
}
// str485RevByte.ucRevByteFlag[i]=RET_SUCCESS;
str485RevByte.ucTime[i]=NO_REV_FLAG;
str485RevByte.ucBitPos[i]=0;
}
}
}
}
}
//发送一个字节
void Send485Byte(unsigned char ucStart485Pos,unsigned char uc485Num)
{
unsigned char i,ucTemp;
uc485Num+=ucStart485Pos;
for(i=ucStart485Pos;i<uc485Num;i++)
{
//将要发送的字节送入发送寄存器
if((str485SendByte.ucSendByteFlag[i]==EMPTY_IRQ_FALG)&&(str485send[i].uc485Send_Tail_P<str485send[i].uc485Send_Head_P))
{
ucTemp=str485send[i].uc485SendBuff[str485send][i].uc485Send_Tail_P];
str485SendByte.usSendByte[i]=(unsigned short)ucTemp;
if(EvenOdd(ucTemp))
str485SendByte.usSendByte[i]|=0x0100;
str485SendByte.ucSendByteFlag[i]=HAVE_IRQ_FALG;
str485send[i].uc485Send_Tail_P++;
}
//发一10位数据
str485SendByte.ucPinFlag[i]=1;
if(str485SendByte.ucSendByteFlag[i]==HAVE_IRQ_FALG)
{
if(str485SendByte.ucBitPos[i]==NO_SEND_FLAG)
{
str485SendByte.ucBitPos[i]=0;
str485SendByte.ucPinFlag[i]=0;
}
else if(str485SendByte.ucBitPos[i]<9)
{
if((str485SendByte.usSendByte[i]&0x0001)==0x0000)
str485SendByte.ucPinFlag[i]=0;
str485SendByte.usSendByte[i]>>=1;
str485SendByte.ucBitPos[i]++;
}
else
{
str485SendByte.ucPinFlag[i]=1;
str485SendByte.ucBitPos[i]=NO_SEND_FLAG;
str485SendByte.ucSendByteFlag[i]=EMPTY_IRQ_FALG;
}
}
}
}
//奇偶校验
unsigned char EvenOdd(unsigned char ucTemp)
{
unsigned char ucRet;
ucRet=0;
if(table_odd_even_bit[ucTemp&0x0F])
ucRet=1;
if(table_odd_even_bit[ucTemp>>4])
ucRet++;
ucRet&=0x01;
return ucRet;
}
///////////////////////////////////
//从1,2路接收一个字节
void Rev485Byte16Comm(unsigned char ucTimeNum)
{
unsigned int uiPIN0Value,uiPIN1Value;
uiPIN0Value = IO0PIN;
uiPIN1Value = IO1PIN;
if(uiPIN0Value&PIN_RX1)
str485RevByte.ucPinFlag[0]=1;
else
str485RevByte.ucPinFlag[0]=0;
if( uiPIN1Value &PIN_RX2)
str485RevByte.ucPinFlag[1]=1;
else
str485RevByte.ucPinFlag[1]=0;
//从3,4路接收一个字节
if(uiPIN0Value&PIN0_RX3)
str485RevByte.ucPinFlag[2]=1;
else
str485RevByte.ucPinFlag[2]=0;
if( uiPIN1Value &PIN1_RX4)
str485RevByte.ucPinFlag[3]=1;
else
str485RevByte.ucPinFlag[3]=0;
//从5,6路接收一个字节
if(uiPIN0Value&PIN0_RX5)
str485RevByte.ucPinFlag[4]=1;
else
str485RevByte.ucPinFlag[4]=0;
if( uiPIN1Value &PIN1_RX6)
str485RevByte.ucPinFlag[5]=1;
else
str485RevByte.ucPinFlag[5]=0;
//从7,8路接收一个字节
if(uiPIN1Value&PIN1_RX7)
str485RevByte.ucPinFlag[6]=1;
else
str485RevByte.ucPinFlag[6]=0;
if( uiPIN0Value &PIN0_RX8)
str485RevByte.ucPinFlag[7]=1;
else
str485RevByte.ucPinFlag[7]=0;
//从9,10路接收一个字节
if(uiPIN1Value&PIN1_RX9)
str485RevByte.ucPinFlag[8]=1;
else
str485RevByte.ucPinFlag[8]=0;
if( uiPIN0Value &PIN0_RX10)
str485RevByte.ucPinFlag[9]=1;
else
str485RevByte.ucPinFlag[9]=0;
//从11,12路接收一个字节
if(uiPIN1Value&PIN1_RX11)
str485RevByte.ucPinFlag[10]=1;
else
str485RevByte.ucPinFlag[10]=0;
if( uiPIN0Value &PIN0_RX12)
str485RevByte.ucPinFlag[11]=1;
else
str485RevByte.ucPinFlag[11]=0;
//从13,14路接收一个字节
if(uiPIN1Value&PIN1_RX13)
str485RevByte.ucPinFlag[12]=1;
else
str485RevByte.ucPinFlag[12]=0;
if( uiPIN1Value &PIN1_RX14)
str485RevByte.ucPinFlag[13]=1;
else
str485RevByte.ucPinFlag[13]=0;
//从15,16路接收一个字节
if(uiPIN0Value&PIN0_RX15)
str485RevByte.ucPinFlag[14]=1;
else
str485RevByte.ucPinFlag[14]=0;
if( uiPIN1Value &PIN1_RX16)
str485RevByte.ucPinFlag[15]=1;
else
str485RevByte.ucPinFlag[15]=0;
Rev485Byte(ucTimeNum,0,16);
}
//向485发送一个字节
void Send485Byte16Comm(void)
{
Send485Byte(0,16);
if(str485SendByte.ucPinFlag[0]==0)
IO0CLR = PIN_TX1;
else
IO0SET =PIN_TX1;
if(str485SendByte.ucPinFlag[1]==0)
IO1CLR = PIN_TX2;
else
IO1SET =PIN_TX2;
//向3,4路485发送一个字节
if(str485SendByte.ucPinFlag[2]==0)
IO0CLR = PIN0_TX3;
else
IO0SET =PIN0_TX3;
if(str485SendByte.ucPinFlag[3]==0)
IO0CLR = PIN0_TX4;
else
IO0SET =PIN0_TX4;
//向5,6路485发送一个字节
if(str485SendByte.ucPinFlag[4]==0)
IO0CLR = PIN0_TX5;
else
IO0SET =PIN0_TX5;
if(str485SendByte.ucPinFlag[5]==0)
IO0CLR = PIN0_TX6;
else
IO0SET =PIN0_TX6;
//向7,7路485发送一个字节
if(str485SendByte.ucPinFlag[6]==0)
IO0CLR = PIN0_TX7;
else
IO0SET =PIN0_TX7;
if(str485SendByte.ucPinFlag[7]==0)
IO0CLR = PIN0_TX8;
else
IO0SET =PIN0_TX8;
//从9,10路接收一个字节
if(str485SendByte.ucPinFlag[8]==0)
IO0CLR = PIN0_TX9;
else
IO0SET =PIN0_TX9;
if(str485SendByte.ucPinFlag[9]==0)
IO0CLR = PIN0_TX10;
else
IO0SET =PIN0_TX10;
//向11,12路485发送一个字节
if(str485SendByte.ucPinFlag[10]==0)
IO0CLR = PIN0_TX11;
else
IO0SET =PIN0_TX11;
if(str485SendByte.ucPinFlag[11]==0)
IO0CLR = PIN0_TX12;
else
IO0SET =PIN0_TX12;
//向13,14路485发送一个字节
if(str485SendByte.ucPinFlag[12]==0)
IO0CLR = PIN0_TX13;
else
IO0SET =PIN0_TX13;
if(str485SendByte.ucPinFlag[13]==0)
IO0CLR = PIN0_TX14;
else
IO0SET =PIN0_TX14;
//向15,16路485发送一个字节
if(str485SendByte.ucPinFlag[14]==0)
IO0CLR = PIN0_TX15;
else
IO0SET =PIN0_TX15;
if(str485SendByte.ucPinFlag[15]==0)
IO0CLR = PIN0_TX16;
else
IO0SET =PIN0_TX16;
}
答 6: 好代码~~学习 答 7: 看看我的串口驱动,硬件的软件的扩展的,统一接口
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