OP-BTS Device Script Interpreter Guide: Syntax

Principle introduction

Demo show

Demo 01 Light up

import PikaStdLib
import machine

mem = PikaStdLib.MemChecker()
io1 = machine.GPIO()
time = machine.Time()

io1.setPin('PA8')
io1.setMode('out')
io1.enable()
io1.low()

print('hello pikascript')
print('mem.max:')
mem.max()
print('mem.now:')
mem.now()

while True:
    io1.low()
    time.sleep_ms(500)
    io1.high()
    time.sleep_ms(500)

Look at the script, it’s all Python3 standard syntax.

Demo 02 Serial port test

import PikaStdLib
import machine

time = machine.Time()
uart = machine.UART()
uart.setId(1)
uart.setBaudRate(115200)
uart.enable()

while True:
    time.sleep_ms(500)
    readBuff = uart.read(2)
    print('read 2 char:')
    print(readBuff)

Open a serial port and try to read two characters

This is the output result.

Syntax support

Support for a subset of python3 standard syntax.

object support

Syntax Runtime Shell
Module Definition - -
Module import √ √
Class Definition √ √
class inheritance √ √
method definition √ √
method overloading √ √
method invocation √ √
parameter definition √ √
parameter assignment √ √
object creation √ √
object destruction √ √
object nesting √ √
control flow √ √

Operator

+ - * / == > < >= <= % ** // != & » « and or not in += -= *= /=
√ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √

Control flow

Syntax State
if √
while √
for in [list] √
for in range(a, b) √
for in [dict] √
if elif else √
for break/continue √
while break/continue √

Module

Syntax Python Module
import [module] √
import [module] as √
from [module] import [class/function>] √
from [module] import [class/function>] as √
from [module] import * -

List/Dict

Syntax State
l = list() √
l = [a, b, c] √
d = dict() √
d = {‘a’:x, ‘b’:y, ‘c’:z} √

Exception

Syntax State
try: √
except: √
except [Exception]: -
except [Exception] as [err]: -
except: …
raise: √
raise [Exception]: -
finally: -

Slice

Syntax str bytes list
test[i] √ √ √
test[a : b] √ √ √
test[a :] √ √ √

Other keywords/Syntax

yield is comprehensions
- - √ -