STC89C51，FreeModbus移植。搞过的人进来看看。

只看该作者 · 2013-4-14 20:54

捣鼓了几天，最终发现太大了，51跑步起来，或者别的啥都别干，就跑FreeModbus。

只看该作者 · 2013-4-15 15:46

确实太大了，我的Modbus，用STC89C52驱动，包括8位数码管扫描，设置界面，EEPROM的读写，
才4.4K的ROM，

只看该作者 · 2013-6-12 15:59

分享一下代码看看？能够优化？

只看该作者 · 2013-6-12 17:45

还是很深的，值得学习

1万 · 2013-6-12 17:57

FreeModbus包里有一堆demo ,没有8051的?

只看该作者 · 2013-12-17 21:04

没代码，标题党

只看该作者 · 2014-12-3 09:07

可以贴出代码么，我自己设置的好像不对，大神们看看

只看该作者 · 2014-12-3 09:13

哪儿不对  求指正  我用的是90c516rd+
#include "includes.h"
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"

/* ----------------------- static functions ---------------------------------*/
static void prvvTIMERExpiredISR( void );

static u16 n;

tiime.c
------------------------------------------
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; //
ET0 = 1; /
TR0 = 1;  //
}

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.
*/
static void prvvTIMERExpiredISR( void )  interrupt 1
{
// ( void )pxMBPortCBTimerExpired(  );²»ÄÜÖ±½Óµ÷ÓÃ
if(eMBCurrentMode==MB_RTU)
{
xMBRTUTimerT35Expired();
   }
else if(eMBCurrentMode==MB_ASCII)
{
xMBASCIITimerT1SExpired();
}
}

void
vMBPortTimersDelay( USHORT usTimeOutMS )
{

usTimeOutMS = usTimeOutMS;

}

------------------------------------------------
serial.c
----------------------------------------------------

#include "port.h"

/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"
//sbit EnCs=P3^6;  //485Æ¬Ñ¡
/* ----------------------- static functions ---------------------------------*/
static void prvvUARTTxReadyISR( void );
static void prvvUARTRxISR( void );

static u8 TxEnable;

/* ----------------------- Start implementation -----------------------------*/
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);

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;
}

/* 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.
*/
static void prvvUARTTxReadyISR( void )
//×ÜÏß·¢ËÍ³ÌÐòºó×Ô¶¯µ÷ÓÃ ¸Ä ÖÐ¶Ï·þÎñ
{

if(eMBCurrentMode==MB_RTU){
xMBRTUTransmitFSM();
}else if(eMBCurrentMode==MB_ASCII){
xMBASCIITransmitFSM();
}
}

/* 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.
*/
static void prvvUARTRxISR( void )
{
if(eMBCurrentMode==MB_RTU){
xMBRTUReceiveFSM();
}else if(eMBCurrentMode==MB_ASCII){
xMBASCIIReceiveFSM();
}
}

//´®¿ÚÖÐ¶Ï
void UartISR(void) interrupt 4
{
if(RI)
{
   RI=0;
   prvvUARTRxISR();

   }
if(TI)
{
   TI=0;
if(TxEnable)
{
   prvvUARTTxReadyISR();
   }
   }
}

void
vMBPortClose( void )
{
/*close the TX and RX enable*/

}

STC89C51，FreeModbus移植。搞过的人进来看看。

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