3.c

基于80C196KC微处理器的高速串行通讯、单片机将FIFO中的数据读取出来后

//--------------------------------------------------------------------------- 
// 
// RS485NT.H 
// 
// Author: Anthony A. Kempka 
// Device Drivers International, LLC 
// 
// Tel: [phone] 
// Tel: [phone] 
// Web: www.ddiusa.com 
// 
// 
// For: Integrity Instruments (a division of Cogito Software, Inc.) 
// 
// Tel: [phone] 
// Web: www.integrityusa.com 
// 
// 
// Last Modified: 
// A. A. Kempka 08/20/97 Original. 
// 
//--------------------------------------------------------------------------- 

// 
// Defaults 
// 

#define DEF_PORT_ADDRESS 0x2F8 
#define DEF_PORT_RANGE 0x07 
#define DEF_IRQ_LINE 0x03 
#define DEF_BAUD_RATE 19200 
#define DEF_BUFFER_SIZE 2048 

//--------------------------------------------------------------------------- 
// 
// *Note* 
// ALL variables and data storage should be placed in 
// the following data structure. 
// 

typedef struct _RS485NT_DEVICE_EXTENSION { 
PDEVICE_OBJECT DeviceObject; 
PKINTERRUPT InterruptObject; 
KIRQL Irql; 
ULONG InterruptCount; 
ULONG RcvError; 
LARGE_INTEGER LastQuerySystemTime; 
ULONG ioCtlCode; 
PUCHAR PortAddress; 
KIRQL IRQLine; 
ULONG BaudRate; 
COMPORT ComPort; 
KEVENT XmitDone; 
ULONG BufferSize; 
PUCHAR XmitBuffer; 
PUCHAR XmitBufferPosition; 
PUCHAR XmitBufferEnd; 
ULONG XmitBufferCount; 
PUCHAR RcvBuffer; 
PUCHAR RcvBufferPosition; 
PUCHAR RcvBufferEnd; 
ULONG RcvBufferCount; 
} RS485NT_DEVICE_EXTENSION, *PRS485NT_DEVICE_EXTENSION;