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/*  For I-7550                          */
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Version 2.4[29/10/2020] by Jimmy
1.Adjust firmware for hardware updating
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Version 2.3[20/5/2015] by Harlem
1.fixed ComPort Receive bug
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Version 2.2[19/1/2010] by Raiden
1. new add IO FIFO
2. enhance diagnostic function
3. modify GSD file to version v1.22
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Version 2.1[18/3/2008] by Raiden
1. fixed bug:
   a. unit of time out error
   b. input fixed length data error
2. improve timer accuracy
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Version 2.0[22/1/2008] by Raiden
1. Add Diagnostic function
   1.1 Add system setting module error
   2.2 Add input data error
2. Add the unit of time out value is 1ms or 10ms
3. modify system module is 5 bytes out, 3 bytes in
   3.1 byte 0 of profibus output data area is the data output command
   3.2 byte 1 of profibus output data area is "diagnostic message clear" 
       and "receive data count clear"
   3.3 byte 2 of profibus input data area is "receive data count"
4. modify parameter configure
5. modify GSD file to version v1.21
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Version 1.4[17/12/2007] by Raiden
1. modify configure buffer is 33 bytes to support the max I/O modules 
   are 32 modules.
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Version 1.3[7/12/2007] by Raiden
1. improve binary data transmit.
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Version 1.2[3/12/2007] by Raiden
1. modify control method of led flash
2. check eeprom first before station address save to eeprom.
3. modify receive data interval time to improve the correct rate of data
   receive ,when data format is not 10 bits and baudrate is lower.
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Version 1.1[8/10/2007] by Raiden
1. When input data length are bigger than 128, abandon the spare data to 
   avoid buffer overflow.