Add buildin ssd1306

[Palomino34]

[Palomino34]

Added:
Note: PB2, PB8, PB9 can be different, depend on rev.

from machine import Pin,I2C, SoftI2C
import ssd1306

pen=Pin("PB2",Pin.OUT_PP)
pen.high()

pscl = Pin("PB8", Pin.OPEN_DRAIN)
psda = Pin("PB9", Pin.OPEN_DRAIN)
i2c = SoftI2C(pscl, psda, freq=100000)
ssd = ssd1306.SSD1306_I2C(128, 64, i2c)
ssd.text('GHI Electronics', 0, 0, 1)
ssd.text('BrainPad Pulse', 0, 15, 1)
ssd.text('  SC13048Q', 0, 30, 1)
ssd.text(' Micropython', 0, 45, 1)
ssd.fill_rect(10, 60, 20, 3, 1)
ssd.show()