Introduction to the Easy Format supported Voice / Melody controller

Syntax of Easy Format Supported Voice / Melody controller

Introduction to Easy Format Enhanced C

Example 1: One shot (Irretriggerable)

Example 2: One shot (Retriggerable by itself)

Example 3: Police Car (Toy application)

After you browse through the following typical examples,  you may grasp the concept about the structure of Easy Format.   The syntax of an Easy Format application can be divided into following sections.

1. Determine the multiplexed input keys.
2. Declare the voice/melody file.
3. Define Input States.
4. Define Output States.
5. Define the Paths.

The following state diagram illustrates the state transition in this example.

Program Listing

;Note: "Path"1 is the path to be executed corresponding to a rising edge at Port 1.1

Paths
POWERUP:   STATE#0  END
PATH1:         BUSY  SOUND  STATE#0   END

The following state diagram illustrates the state transition in this example.

Program Listing

;Note: "Path"1 is the path to be executed corresponding to a falling edge at Port 1.1.
;         The falling edge trigger is denoted by the "/" sign.  Please note that an input
;         pin can be programmed to response to both rising edge and falling, each
;         leads to a different execution Path.

Paths
POWERUP:   STATE#0  END
PATH1:         SOUND  END

This is a full program application example to demonstrate how Easy Format handle a complicated design requirement.  All the work is to be done on a single page.

The product requirements are:

4 Push Buttons Inputs and 2 Outputs to drive 2 lights.

BUTTONS:

1. Start Button : Turn ON (START) or OFF the engine.
2. Accel Button : Gas pedal to give ACCELERATION sound from idle and then keep on at a steady sound.
3. Siren Button : SIREN sound On/Off : toggle ON and toggle OFF.
4. Brake Button : BRAKE, triggers deceleration sound and then bring the car to idle.

LEDS :

LED Output : Blink in opposite phase when the Siren sound is On.  That is when one light is On, the other light is Off in an alternating pattern.

TIME OUT REQUIREMENTS:

Every sound needs to be automatic shut down after a specified period of time if no more trigger signal is received.

The structure of this program can be illustrated with the state diagram.

Program Listing

Input States

Output States

Paths

1. The 4 switches correspond to Port2.0 to P2.3 respectively.  Each switch is properly named during the programming process to facilitate cross reference.
2. A signal Flow Diagram is very helpful to structure the program.  This demo program is a good example to demonstrate how well Easy Format is supported by a good flow chart directly.
3. The 5 Input States corresponds to the 5 steady states of the flow chart and can also be freely named by the users to facilitate program tracing.
4. Each Path equation correspinds to a Path linking the steady states of the flow chart and can also be freely named by the users to facilitate program tracing.
5. The output Port3.0 and 3.1 drives the red and blue blinking lights of the police car.   The P+ and P- signifies +ve going and -ve going pulses to provide the alternating lightling effect.  "L" means the output port is set at logic LOW.
6. The timeout function is provided by looping the sound to the desirable time out duration, if no more trigger is received, the controller will enter the shut down mode.