def writeClock(freq_mult, divisor):
i2c = busio.I2C(board.SCL, board.SDA)
# Initialize SI5351.
si5351 = adafruit_si5351.SI5351(i2c)
si5351.pll_a.configure_integer(freq_mult)
print('PLL A frequency: {0}mhz'.format(si5351.pll_a.frequency/1000000))
# si5351.pll_b.configure_fractional(24, 2, 3) # Multiply 25mhz by 24.667 (24 2/3)
# print('PLL B frequency: {0}mhz'.format(si5351.pll_b.frequency/1000000))
si5351.clock_0.configure_integer(si5351.pll_a, divisor)
print('Clock 0: {0}mhz'.format(si5351.clock_0.frequency/1000000))
# si5351.clock_1.configure_fractional(si5351.pll_b, 45, 1, 2) # Divide by 45.5 (45 1/2)
# print('Clock 1: {0}mhz'.format(si5351.clock_1.frequency/1000000))
# si5351.clock_2.configure_integer(si5351.pll_b, 900)
# si5351.clock_2.r_divider = adafruit_si5351.R_DIV_64
# print('Clock 2: {0}khz'.format(si5351.clock_2.frequency/1000))
# After configuring PLLs and clocks, enable the outputs.
si5351.outputs_enabled = True
# - PLL B at 616.66667mhz
# - Clock 0 at 112.5mhz, using PLL A as a source divided by 8
# - Clock 1 at 13.553115mhz, using PLL B as a source divided by 45.5
# - Clock 2 at 10.76khz, using PLL B as a source divided by 900 and further
# divided with an R divider of 64.
import board
import busio
import adafruit_si5351
# Initialize I2C bus.
i2c = busio.I2C(board.SCL, board.SDA)
# Initialize SI5351.
si5351 = adafruit_si5351.SI5351(i2c)
# Alternatively you can specify the I2C address if it has been changed:
# si5351 = adafruit_si5351.SI5351(i2c, address=0x61)
# Now configue the PLLs and clock outputs.
# The PLLs can be configured with a multiplier and division of the on-board
# 25mhz reference crystal. For example configure PLL A to 900mhz by multiplying
# by 36. This uses an integer multiplier which is more accurate over time
# but allows less of a range of frequencies compared to a fractional
# multiplier shown next.
si5351.pll_a.configure_integer(36) # Multiply 25mhz by 36
print("PLL A frequency: {0}mhz".format(si5351.pll_a.frequency / 1000000))
# And next configure PLL B to 616.6667mhz by multiplying 25mhz by 24.667 using
# the fractional multiplier configuration. Notice you specify the integer
# multiplier and then a numerator and denominator as separate values, i.e.