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# pyboard testing functions for CPython

import time

def delay(n):

#time.sleep(float(n) / 1000)

pass

rand_seed = 1

def rng():

global rand_seed

# for these choice of numbers, see P L'Ecuyer, "Tables of linear congruential generators of different sizes and good lattice structure"

rand_seed = (rand_seed * 653276) % 8388593

return rand_seed

# LCD testing object for PC

# uses double buffering

class LCD:

def __init__(self, port):

self.width = 128

self.height = 32

self.buf1 = [[0 for x in range(self.width)] for y in range(self.height)]

self.buf2 = [[0 for x in range(self.width)] for y in range(self.height)]

def light(self, value):

pass

def fill(self, value):

for y in range(self.height):

for x in range(self.width):

self.buf1[y][x] = self.buf2[y][x] = value

def show(self):

print('') # blank line to separate frames

for y in range(self.height):

for x in range(self.width):

self.buf1[y][x] = self.buf2[y][x]

for y in range(self.height):

row = ''.join(['*' if self.buf1[y][x] else ' ' for x in range(self.width)])

print(row)

def get(self, x, y):

if 0 <= x < self.width and 0 <= y < self.height:

return self.buf1[y][x]

else:

return 0

def pixel(self, x, y, value):

if 0 <= x < self.width and 0 <= y < self.height:

self.buf2[y][x] = value