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Anti Em Help

Compatible Pocket Computers

Sharp EL-5500, EL-5500II, PC-1401, PC-1402

Basic Usage

Anti Em's interface to the Sharp Pocket Computer is a printer emulator, so commands are issued to Anti Em as though they were being printed. There are two ways to do this:

• Direct: Enable printing with Shift-Enter and run commands in RUN mode. If the command contains any non-numeric characters, it must be enclosed in quotation marks.
• Program: Send commands with either LPRINT or by using PRINT = LPRINT in a program

To change Anti Em's mode, print a string to Anti Em containing @ and the mode name. The Anti Em modes are:

• @EM (printer emulator)
• @CV (send 0-5V control voltage and gate (high/low)
• @MIDI (send MIDI commands)
• @HELP (return to @EM mode, and write a help screen to the terminal)

@EM Usage

Print to Anti Em while its USB port is connected to a computer. Use a terminal program to listen to the USB port at 9600 baud.

@CV Usage

D{0-4095}

Emits voltage corresponding to the DAC value. This is uncalibrated voltage, and can be used to calibrate Anti Em

={0-4095}

Saves the specified DAC value to EEPROM, and treats it as the value at 1V. Use the D command and a volt meter to find the DAC value that sends 1V, and then use = with that number to calibrate Anti Em. You may return Anti Em to its default calibration by printing the =0 command

{0.00-5.00}

Print a floating point number from 0 to 5 to emit the specified voltage. The maximum voltage depends on the Arduino's max output. If the voltage emitted does not match the expression, then follow the calibration procedure described under the = command

+

Gate on. The gate output goes high, to the Arduino's max output

-

Gate off. The gate output goes low, to 0V

L{0-9999}

Set gate length in ms for the S command. Defaults to 10ms on power-up

S{0.00-5.00V}

Synchronized output. Emits the specified voltage and sets the gate high for the length specifed by the L command

@MIDI Usage

N{0-127}

Note On. Sends a note message for the current channel, at the current velocity. If a note was previously on, send a note off first

X

Note Off. Sends a note off message for the last note on, on the last channel

C{1-16}

Set MIDI channel for subsequent note on messages. Defaults to 1 on power-up.

V{0-127}

Set MIDI velocity for subsequent note on messages. Defaults to 127 on power-up. NOTE: At velocity of 0, Anti Em will send note off messages for the N command