关于51单片机移植freemodbus出现的情况

只看该作者 · 2014-12-3 09:39

大家好，近期在51上移植freemodbus，先是从网上download个程序，发现是用STC12系列的单片机移植的，自己想用90c516RD+移植，折磨了一周，出来的结果是，只要发数据，就有应答，但是其他的参数设置无所谓，怎么变都是有数据的，特来向大家求助！
先粘上串口与定时的配置部分
--------------------------------------------
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{
/* If xRXEnable enable serial receive interrupts. If xTxENable enable
* transmitter empty interrupts.
*/
if(xRxEnable && xTxEnable)
{
TxEnable = 1;
REN = 1;//½ÓÊÕÊ¹ÄÜ
ES = 1;//ÖÐ¶ÏÊ¹ÄÜ
//EnCs=1; //Ê¹ÄÜ485·¢ËÍÆ¬Ñ¡
}
else if(!xRxEnable && xTxEnable)
{
TxEnable = 1;
REN = 0;//½ÓÊÕÊ¹ÄÜ
ES = 1;//ÖÐ¶ÏÊ¹ÄÜ
//EnCs=1;
}
else if(xRxEnable && !xTxEnable)
{
TxEnable = 0;
REN = 1;//½ÓÊÕÊ¹ÄÜ
ES = 1;//ÖÐ¶ÏÊ¹ÄÜ
//EnCs=1;//Ê¹ÄÜ485½ÓÊÜÆ¬Ñ¡
}
else
{
TxEnable = 0;
REN = 0;//½ÓÊÕÊ¹ÄÜ
ES = 0;//ÖÐ¶ÏÊ¹ÄÜ
//EnCs=0;
}
}
BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{
u16 bps;
ucPORT = ucPORT;
ucDataBits = ucDataBits;
eParity = MB_PAR_NONE;
bps = ulBaudRate;
TMOD = 0x20;
SCON = 0x50;
//TH1 = 0xFE;
//TL1 = TH1;
PCON = 0x00;
TMOD &= ~0x80;
TMOD &= ~0x40;
TMOD |= 0x20;
TH1 = 0-(F_MCU/12/bps);
@kangzp @nb4555
EA = 1;//ÖÐ¶ÏÔÊÐí
ES = 1;//´®ÐÐ¿ÚÖÐ¶Ï Ê¹ÄÜ
TR1 = 1;//Æô¶¯T1¹¤×÷
TxEnable = 1;
return TRUE;
}
BOOL
xMBPortSerialPutByte( CHAR ucByte )
{
/*·¢ËÍº¯Êý*/
SBUF = ucByte;
return TRUE;
}
BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{
/*½ÓÊÕº¯Êý*/
*pucByte = SBUF;
return TRUE;
}
/*50us µÄ»ùÊ±Ê±ÖÓ*/
BOOL
xMBPortTimersInit( USHORT usTim1Timerout50us )
{
TMOD|= 0x01;
TH0 = 0xFE;
TL0 = 0x0C; // timer sets at 50us
IE = 0X82;//T0ÖÐ¶ÏÔÊÐí
TR0 = 1; //Æô¶¯T0
TMOD &= ~0x08;
TMOD &= ~0x04;
n = usTim1Timerout50us;
return TRUE;
}
void
vMBPortTimersEnable( )
{
/* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
TH0 = U16_HI(0-(F_MCU/12/20000)*n);
TL0 = U16_LO(0-(F_MCU/12/20000)*n);
TF0 = 0; //T0Òç³öÖÐ¶ÏÇëÇó ÎÞ
ET0 = 1; //ÖÐ¶ÏÔÊÐí
TR0 = 1; //Æô¶¯ T0¹¤×÷
}
void
vMBPortTimersDisable( )
{
/* Disable any pending timers. */
ET0 = 0;
TR0 = 0;
}
/* Create an ISR which is called whenever the timer has expired. This function
* must then call pxMBPortCBTimerExpired( ) to notify the protocol stack that
* the timer has expired.
*/
//µ÷ÓÃ´Ëº¯Êýºó Çå³þÖÐ¶Ï±êÖ¾Î»
static void prvvTIMERExpiredISR( void ) interrupt 1
{
// ( void )pxMBPortCBTimerExpired( );²»ÄÜÖ±½Óµ÷ÓÃ
if(eMBCurrentMode==MB_RTU)
{
xMBRTUTimerT35Expired();
}
else if(eMBCurrentMode==MB_ASCII)
{
xMBASCIITimerT1SExpired();
}
}