char

pilot0315

The old full duplexserial had a char value that can be displayed. I cannot find this in any of the P2 versions.
I do not know what I am missing.
I am simply taking gps data and prior to processing it wanting to send the ascii code to the display.
What am I missing.
Help please.
Thank you.

Ariba

Most objects call it tx() or out()

JonnyMac

That wasn't in FDS, it was in Parallax Serial Terminal. Here is

PUB Char(bytechr)
{{Send single-byte character.  Waits for room in transmit buffer if necessary.
  Parameter:
    bytechr - character (ASCII byte value) to send.}}

  repeat until (tx_tail <> ((tx_head + 1) & BUFFER_MASK))
  tx_buffer[tx_head] := bytechr
  tx_head := (tx_head + 1) & BUFFER_MASK

  if rxtx_mode & %1000
    CharIn

As Andy points out, that was just another name for tx() -- this is from the original FDS.

PUB Tx(txByte)
{{
   Places a byte into the transmit buffer for transmission (may wait for room in buffer).

   Parameters: txByte = the byte to be transmitted
   return:     none

   example usage: serial.Tx($0D)

   expected outcome of example usage call: Transmits the byte $0D serially on the txPin
}}

  repeat until (tx_tail <> (tx_head + 1) & $F)          'wait until the buffer has room                        
  tx_buffer[tx_head] := txByte                          'place the byte into the buffer
  tx_head := (tx_head + 1) & $F                         'advance the buffer's pointer

  if rxtx_mode & %1000                                  'if ignoring rx echo
    Rx                                                  '   receive the echoed byte and discard

The original FDS has a 16-byte buffer, which is why $F is used as a mask.