MODBUS RTU简例.doc

MODBUS RTU简例 #include DSP281x_Device.h#include DSP281x_Examples.h?#include ModbusRTU.h#include DSP_CRC.h//------------MODBUS FUNCODE-----------------------#define READ_N_DO 01#define READ_N_DI 02#define READ_AO??? 03#define READ_AI??? 04#define SET_1_DO?? 05#define SET_1_AO?? 06#define SET_N_DO?? 15#define SET_N_AO?? 16//定义错误码#define ERROR_FUNCODE??? 1??? //错误功能码#define ERROR_ADDR??? ??? 2??? //错误地址#define ERROR_DATA??? ??? 3??? //错误数据#define ERROR_FAILURE??? 4??? //从机故障//------------UART_MODULE.Status---------------#define IDLE_WAIT??? ??? 0x00??????? // 空闲态，等待起始位#define RECE_START????? 0x01??????? // 收到起始位，等待结束位#define RECE_END??????? 0x02??????? // 收到结束位，等待发送#define SEND_START????? 0x03??????? // 发送起始位#define SEND_END??????? 0x04??????? // 发送完毕//---------------------------------------------volatile struct MODBUS_MODULE ModbusModule;//---------------------------------------------Uint16 RTUFrameAnalyse(Uint16 *dest_p);void ModbusDefaultInitSci();void ConstructFrame_RTUReadReg( Uint16 type,Uint16 start_address,Uint16 lenth);void ConstructFrame_RTUSetNReg( Uint16 type,Uint16 *com_buf,Uint16 start_address,Uint16 lenth);void ReadSci(volatile Uint16 * buf ,volatile Uint16 * inx);//---------------------------------------------//---------------------------------------------void ConfigureModbus (Uint16 ID,Uint16 SCI){Uint16 i;??? for( i = 0;i 256 ;i++ )??? {??????? ModbusModule.Buf[i] = 0;??? }??? ModbusModule.TxLen = 0;??? ModbusModule.RxLen = 0;??? ModbusModule.TimeoutReg =0;//现在开始只作为从站使用ModbusModule.ID = ID;ModbusModule.Status = IDLE_WAIT;ModbusModule.SCI = SCI;ModbusDefaultInitSci();?}//---------------------------------------------//复位SCI_Avoid ModbusDefaultInitSci(){??? EALLOW;??? GpioMuxRegs.GPGMUX.all |= 0x0030;??? EDIS;??????? EALLOW;??? GpioMuxRegs.GPFMUX.all |= 0x0030;??? EDIS;??? if(ModbusModule.SCI==0)??? {??? ?? SciaRegs.SCICCR.all = 0x07;??? ??????? ?? SciaRegs.SCICTL1.all = 0x03;???