Difference between revisions of "Serial Open"

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{{DISPLAYTITLE:Serial_Open}}
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{{syscall
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== Synopsis ==
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| name = Serial_Open
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'''Syscall index: 0x1BB7'''
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| header = fxcg/serial.h
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| index = 0x1BB7
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'''Function signature:''' int Serial_Open(unsigned char *mode)
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| signature = int Serial_Open(unsigned char* mode)
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| synopsis = Opens the 3-pin serial port with the specified parameters.
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== Inputs ==
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| parameters = * '''mode''' - pointer to a six-byte array containing the settings for the serial port:
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'''mode''': a 6-byte array specifying the desired communication parameters.  Summarized in the table below.
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{{{!}}
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{|
 
 
! Index
 
! Index
 
! Description
 
! Description
 
! Values
 
! Values
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|-
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{{!}}-
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| 0 || Unknown || Always 0
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{{!}} 0 {{!}}{{!}} Unknown {{!}}{{!}} Always 0
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|-
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{{!}}-
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| 1 || Bit rate ||
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{{!}} 1 {{!}}{{!}} Bit rate {{!}}{{!}}
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{|
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{{{!}}
 
! Value
 
! Value
 
! Rate
 
! Rate
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|-
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{{!}}-
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| 0 || 300
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{{!}} 0 {{!}}{{!}} 300
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|-
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{{!}}-
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| 1 || 600
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{{!}} 1 {{!}}{{!}} 600
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|-
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{{!}}-
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| 2 || 1200
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{{!}} 2 {{!}}{{!}} 1200
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|-
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{{!}}-
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| 3 || 2400
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{{!}} 3 {{!}}{{!}} 2400
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|-
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{{!}}-
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| 4 || 4800
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{{!}} 4 {{!}}{{!}} 4800
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|-
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{{!}}-
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| 5 || 9600
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{{!}} 5 {{!}}{{!}} 9600
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|-
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{{!}}-
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| 6 || 19200
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{{!}} 6 {{!}}{{!}} 19200
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|-
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{{!}}-
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| 7 || 38400
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{{!}} 7 {{!}}{{!}} 38400
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|-
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{{!}}-
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| 8 || 57600
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{{!}} 8 {{!}}{{!}} 57600
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|-
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{{!}}-
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| 9 || 115200
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{{!}} 9 {{!}}{{!}} 115200
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|}
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{{!}}}
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|-
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{{!}}-
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| 2 || Parity ||
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{{!}} 2 {{!}}{{!}} Parity {{!}}{{!}}
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{|
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{{{!}}
 
! Value
 
! Value
 
! Parity
 
! Parity
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|-
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{{!}}-
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| 0 || None
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{{!}} 0 {{!}}{{!}} None
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|-
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{{!}}-
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| 1 || Odd
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{{!}} 1 {{!}}{{!}} Odd
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|-
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{{!}}-
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| 2 || Even
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{{!}} 2 {{!}}{{!}} Even
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|}
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{{!}}}
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|-
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{{!}}-
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| 3 || Data length ||
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{{!}} 3 {{!}}{{!}} Data length {{!}}{{!}}
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{|
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{{{!}}
 
! Value
 
! Value
 
! Length (bits)
 
! Length (bits)
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|-
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{{!}}-
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| 0 || 8
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{{!}} 0 {{!}}{{!}} 8
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|-  
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{{!}}-  
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| 1 || 7
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{{!}} 1 {{!}}{{!}} 7
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|}
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{{!}}}
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|-
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{{!}}-
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| 4 || Stop bits ||
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{{!}} 4 {{!}}{{!}} Stop bits {{!}}{{!}}
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{|
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{{{!}}
 
! Value
 
! Value
 
! Stop bits
 
! Stop bits
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|-
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{{!}}-
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| 0 || 1
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{{!}} 0 {{!}}{{!}} 1
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|-
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{{!}}-
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| 1 || 2
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{{!}} 1 {{!}}{{!}} 2
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|}
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{{!}}}
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|-
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{{!}}-
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| 5 || Unused || Always 0
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{{!}} 5 {{!}}{{!}} Unused {{!}}{{!}} Always 0
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|}
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{{!}}}
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| returns = * 0 if successful;
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* 3 if the serial port is already open;
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== Outputs ==
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* 4 if '''mode'''[0] is not zero.
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Returns 0 for success, 3 if the serial port is already open, and 4 if the byte at index 0 was not 0.
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| example = Check if the serial port is already open, and configure it for 9600 bps 8N1 operation if not.
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== Example ==
 
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Check if the serial port is already open, and configure it for 9600 bps 8n1 operation if not.
 
 
  if (Serial_IsOpen() != 1) {
 
  if (Serial_IsOpen() != 1) {
 
     unsigned char mode[6] = {0, 5, 0, 0, 0, 0};    // 9600 bps 8n1
 
     unsigned char mode[6] = {0, 5, 0, 0, 0, 0};    // 9600 bps 8n1
 
     Serial_Open(mode);
 
     Serial_Open(mode);
 
  }
 
  }
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}}
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[[Category:Syscalls|Serial_Open]]
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[[Category:Syscalls:Serial]]

Latest revision as of 06:20, 1 August 2014


Synopsis

Header: fxcg/serial.h
Syscall index: 0x1BB7
Function signature: int Serial_Open(unsigned char* mode)

Opens the 3-pin serial port with the specified parameters.

Parameters

  • mode - pointer to a six-byte array containing the settings for the serial port:
Index Description Values
0 Unknown Always 0
1 Bit rate
Value Rate
0 300
1 600
2 1200
3 2400
4 4800
5 9600
6 19200
7 38400
8 57600
9 115200
2 Parity
Value Parity
0 None
1 Odd
2 Even
3 Data length
Value Length (bits)
0 8
1 7
4 Stop bits
Value Stop bits
0 1
1 2
5 Unused Always 0


Returns

  • 0 if successful;
  • 3 if the serial port is already open;
  • 4 if mode[0] is not zero.

Example

Check if the serial port is already open, and configure it for 9600 bps 8N1 operation if not. 

if (Serial_IsOpen() != 1) {
    unsigned char mode[6] = {0, 5, 0, 0, 0, 0};    // 9600 bps 8n1
    Serial_Open(mode);
}
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