#ifdef _8074W_EXPORTS
	#define I8074WAPI __declspec(dllexport) 
#else
	#define I8074WAPI __declspec(dllimport) 
#endif
	
#ifdef	__cplusplus  // for C++ compile use

extern "C" {
#endif	/*	__cplusplus	*/



#define NoError 					0
#define ID_ERROR					-1
#define SSI_NOT_CONFIG				-2



// Basic Information
// return 0: NoError, -1: ID Error
I8074WAPI short pac_i8074W_Init(int slot);

// No return code
I8074WAPI short pac_i8074W_GetLibVersion(void);

// No return code
I8074WAPI void pac_i8074W_GetLibDate(char libDate[]);


// return firmware version
I8074WAPI short pac_i8074W_GetFirmwareVersion(int slot);

/*


the following decresption and API function parameters are according to 
http://www.trelectronic.com/brochures/LinearEncoders-InterfaceDescription.pdf page 12
			1	2	3   4   5	6	7	8	9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25
	   ----|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-|_|-
		   |<------------------------------------------   totalClockBits-------------------------------------|	
		   |											   |central pos										 |
		   |											   |												 |
		   |						   revolutionBits  <-- |--> stepBits									 |
		   b24 b23 b22 b21 b20 b19 b18 b17 b16 b15 b14 b13 b12 b11 b10  b9  b8  b7  b6  b5  b4  b3  b2  b1  b0   
		   
To Read Data from SSI Encoder	
Step 1: use pac_i8074W_SetSSIConfig	to configure the SSI interface parameters
Step 2: use pac_i8074W_ReadSSIData to check the revolution counts and step counts for each revolution is correct or not
Step 3: use pac_i8074W_ReadEncoder to read the converted result of Encoder data, (revolution count * steps/revolution) + steps position

*/

// SSI Operation functions
// i8074W_SetSSIConfig
// return default :0
// totalClockBits : the total clock count for SSI interface
// revoltionBits : the revolution bit count for SSI interface
// stepBits: the step bit count of single revolution for SSI interface
// centralPos: the central line of Tree-Format data for SSI interface
// freqType: 0: 1MHz, 1: 500KHz, 2: 250KHz, 3: 125KHz
I8074WAPI short pac_i8074W_SetSSIConfig(int slot,int ch, unsigned char totalClockBits,unsigned char revoltionBits,unsigned char stepBits,unsigned char centralPos ,unsigned char freqType,unsigned char codeType); 




// parameters the same as pac_i8074W_SetSSIConfig
// return default :NoError , if not use i8074W_SetSSIConfig it will return SSI_NOT_CONFIG
I8074WAPI short pac_i8074W_GetSSIConfig(int slot,int ch,unsigned char* totalClockBits,unsigned char* revoltionBits,unsigned char* stepBits,unsigned char* centralPos ,unsigned char* freqType,unsigned char *codeType);


// get the SSI revolution count and steps of revolution count.
// return default :NoError , if not use i8074W_SetSSIConfig it will return SSI_NOT_CONFIG
I8074WAPI short pac_i8074W_ReadSSIData(int slot,int ch,long * revolutionCnt, long* stepsPerRevolution,long* rawData );

// get the SSI real encoder data, converted by revolution count and steps of revolution count
// return default :NoError , if not use i8074W_SetSSIConfig it will return SSI_NOT_CONFIG
I8074WAPI short pac_i8074W_ReadEncoder(int slot, int ch, long* encoderData);

#ifdef	__cplusplus
}
#endif	/*	__cplusplus	*/