In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

I have taken the SX/B Help file on the 4x4 keypad and have a working version of it that uses an old Radio Shack 3x5 keypad. When a key is pressed it displays the digit on the 7 segment LED display. All of this was done on my Professional Development board and done fairly easily. 
 

However, I have modified it to TX the character code out (SEROUT) to another SX28 and RX it in (SERIN). After doing a WATCH for the RX variable I see that it is represented by a:

128 decimal (for a 0), 

129 (for a 1), 

130 (for a 2),

131 (for a 3),

132 (for a 4),

133 (for a 5),

134 (for a 6),

135 (for a 7),

136 (for a 8),

137 (for a 9), 

138 (for a A), 

139 (for a B), 

140 (for a C), 

141 (for a D), 

142 (for a E)

 

I would think that I am sending out ascii characters and Im not sure why the SEROUT wants to start at 128 instead of an ASCII '0' code or something like I would think. 

 

When sending them out:

 



[code]
Main:
  theKey = GETKEY                               ' get a key
  IF theKey < 15 THEN                           ' was a key pressed?
    READ ReMap + theKey, theKey                 ' yes, remap keypad
    READ Digits + theKey, LEDs                  ' output to display 

  

    [b]TX_Byte theKey[/b] 

  

    DELAY 100
  ENDIF
  GOTO Main 

  

  


' ------------------------------------------------------
' Subroutine Code
' ------------------------------------------------------ 


' Use: TX_BYTE theByte {, repeats} 

[b]TX_BYTE:
[/b]  temp3 = __PARAM1                              ' save byte
  IF __PARAMCNT = 1 THEN                        ' check for repeats
    temp4 = 1                                   ' set repeats to 1
  ELSE
    temp4 = __PARAM2                            ' get repeats from user
  ENDIF
      SEROUT Sio, Baud, temp3                    
  RETURN 
[/code]
Then when I receive it with something like this:
 


[code]
Main: 


  DataChr = RX_BYTE                             ' wait  


     watch DataChr
     break 


Goto Main 


[code]RX_BYTE:
  SERIN Sio, Baud, tmpB3       
  RETURN tmpB3
The Watch Datachr shows 128-141. 

 

Is this correct?

[/code]

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