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• .clear -- clear js context
• .help -- show all available REPL commands
• .mem -- show memory status
• .gc -- Enforce garbage collection

• Array shows all elements
• Object shows all shallow properties
• String -> 'value'
• Array of string -> ['a', 'b', 'c']
• Function -> [Function]

The pin number for ADC/PWM is GPIO pin number (0~49 for stm32f4discovery target).

• i2c_write, i2c_read functions should be defined separately for master and slave.
• In i2c.c, mode is global variable. This mode should be shared among multiple I2C bus(es)?

• Add IO handle for listen()
• Implement listen()
• How to unlisten?

FatFs: http://elm-chan.org/fsw/ff/00index_e.html

API for interrupt

Interrupt functions: (before implement, thinking about theses are really needed)

• attachInterrupt(pin, callback, event)
  • pin
  • callback
  • event : RISING, FALLING, CHANGE, LOW, HIGH
• detachInterrupt(pin)
• disableInterrupts()
• enableInterrupts()

Constants for event should be re-organized.

• LOW_LEVEL = 0 (bit 0)
• HIGH_LEVEL = 2 (bit 1)
• RISING = 4 (bit 2)
• FALLING = 8 (bit 3)
• CHANGE = RISING | FALLING = 12 (bit 2 and 3)

GPIO

GPIO class should have more functions

• gpio.irq(callback, event)

References

MicroPython ref: https://docs.micropython.org/en/latest/library/machine.Pin.html#machine.Pin.irq

• Move buffer.c to targets/kameleon-core/src and buffer.h to targets/kameleon-core/include
• Eliminate some codes in tty.h
• _Error_Handler
• SetPendSV in system.h?

IOT.js and Espruino uses duty value in between 0.0 and 1.0.

Instead of jerryx_print_..., use console.log implementation.

• delay(msec)
• millis()

Show Error.message in REPL

A way needed to stop the following code.

while (true) {};

Solution:

• Ctrl+C key in REPL. (key should be processed in interrupt).

Compared to Espruino Board: http://www.espruino.com/EspruinoBoard

What about gpio_set_pin_mode(pin, mode)?

• setInterval
• setTimeout
• clearInterval
• clearTimeout

example)

> console.log("test");
'test'
>

Single quote should be eliminated.

• Reduce PWM pins (total 6 pins to 5 pins) because limited number of timers in MCU
• ~8, ~9 pins are not working
• Avoid sharing timers among pins

Enhance toString() for Array, Object, Function, etc. like in Node.js
For examples)

>"asdfasdf"
'asdfasdf'

>[1, 2, 3]
[1, 2, 3]

>{ a:1, b:2}
{ a: 1, b: 2 }

>[1, 2, "test", function () {}]
[1, 2, 'test', [Function]]

• Backspace
• Delete