language：English/日本語

Ruby

For Ruby classes supported by mruby/c, see the official URL below.
https://www.s-itoc.jp/activity/research/mrubyc/mrubyc_docs/library

GPIO

new(pin)

pin：0～20

setmode(mode)

Configure pins to act as inputs or outputs.
mode：0(output),1(input)

write(value)

Write a 1 or a 0 value to a pin.
3.3V for 1, 0V (ground) for 0.
value：0(OFF),1(ON)

read()

Reads the value from a specified pin, either 1 or 0.
return value：0(OFF),1(ON)

pull(mode)

Internal resistance selection.
mode：-1~1
-1(pull down) , 0(not pull) , 1(pull up)

ADC

new(pin)

pin：0～20

read

Reads the value from the specified analog pin.
It is output as a voltage value.(0V~3.3V)
return value：0～3.3

read_v

※same as [read]
Reads the value from the specified analog pin.
It is output as a voltage value.(0V~3.3V)
return value：0～3.3

I2C

new()

write(sl_addr, addr, data1, data2,,,,)

Write data to the slave device using I2C communication.
sl_addr：slave address
addr：data address
data：data

read(sl_addr, size, addr)

Read data from slave device using I2C communication.
sl_addr：slave address
size：read size
addr：data address

PWM

new(pin)

pin：0～20

frequency(n)

frequency setting. Specify 0 to stop output.
n:integer(Hz)

duty(n)

Specify the duty ratio from 0 (all off) to 1023 (all on).
n:0~1023

period_us(us)

Specifies the cycle in microseconds.
us:integer[microsecond]

duty_us(us)

Specifies the duty cycle in microseconds.
us:integer[microsecond]
If (period_us) is 100 microseconds and (duty_us) is 50 microseconds, on:off will be 1:1.

UART

new( ch, baud )

ch ：UART Channel（1 or 2）
　1=>Channel used by USB
　2=>Channel used by GROVE
baud：baud rate value（sample value：19200）

set_modem_params("baud"=>baud,"parity"=>parity,"stop_bits"=>stop_bits,"txd"=>txd,"rxd"=>rxd)

baud：baud rate value（sample value：19200）
parity：parity bit(0~2)
stop_bits：stop bit(1 or 2)
txd：TX pin number
　Channel 1->(0,8,9,12,20)
　Channel 2->(3,5,14,15,19)
rxd：RX pin number
Channel 1->(2,4,7,11,18)
Channel 2->(1,6,10,13,16)

gets

Receives a string. Returns bytes up to "\n".
return value：String

write(text)

Send a string.
text：String

read(n)

Receives a string. Receives only the specified number of characters.
Returns nil if the specified number of bytes of data has not arrived.
n：integer(word count)
return value：String or nil

read_nonblock(n)

Receives a string. Receives only the specified number of characters.
If the specified number of bytes of data has not arrived, it returns the data that has arrived.
n：integer(word count)
return value：String

puts(text)

Send a string.
※same as [write]
text：String

clear_rx_buffer

Initialize received string buffer

clear_tx_buffer

Initialize transmission string buffer

Math

https://github.com/YoshihiroOgura/pic32mx170_mrubyc/blob/a0542f4fb76b2f3e1ba6e5078c9e3fc3a7164865/src/c_math.c#L240

Additional features of RBoard

leds_write(byte)

onboard led control.
byte：integer
led Decimal Number binary
1 1 0b0001
2 2 0b0010
3 4 0b0100
4 8 0b1000

sw()

Read state of onboard switch
Switch with pull-up resistor
return value：0(switch on) or 1(switch off)

pinInit

Reset all pin settings to default.

puts(txt)

string output
Terminal software settings:link
txt：string