converter/ascii_usb/README

   1 ASCII to USB keyboard protocol converter
   2 ========================================
   3 This converts serial console terminal into USB keyboard, tested with TRS-80 model 100 TELCOM application.
   4 Target MCU is ATMega32u4 but other USB capable AVR will also work.
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   7 Hardware
   8 --------
   9 Connect RX, TX and GND to UART pin of AVR. Note that you may need line driver/level shifter like MAX232 to interface high voltage of RS-232C.
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  13 Build Firmware
  14 --------------
  15 Configure UART setting and Just use 'make'
  16
  17     $ cd ascii_usb
  18     $ make
  19
  20 Then, load the binary to MCU with your favorite programmer.
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  24 Limitation
  25 ----------
  26 - This cannot see key up event, you cannot hold a key.
  27 - Alt, Gui(Win/Mac) modifier key are not available.
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  31 TRS-80 model 100
  32 ----------------
  33 Use TELCOM program with setting: 19200bps/8bit/odd parity/1stop bit
  34 To set this configuration push Stat(F3) and input '9801D,10'. Then push Term(F4) to connect.
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