Clean up sar_adc.py by removing unused code

Removed unused imports and commented-out code related to SMU and plotting.

Author: hansk68

code/SAR_ADC/sar_adc.py

@@ -3,20 +3,8 @@
 import spidev as SPI
 import matplotlib.pyplot as plt
 import numpy as np
-from scipy import stats
-import sys
 from tqdm import tqdm
 
-sys.path.insert(1, '/home/pi/Embedded-System-Lab/code/SMU')
-from smu_class import SMU
-
-# voltage source with current measurement
-smu = SMU()
-cvm = smu.ch[0]
-cvm.enable_autorange()
-
-
-
 # SPI bus setup
 spi = SPI.SpiDev()
 spi.open(0,0)  # (bus, device)
@@ -32,30 +20,13 @@
 GPIO.setup(SAMPLE, GPIO.OUT) 
 GPIO.output(SAMPLE, GPIO.LOW) # open switch
 
-
-
 cvm.set_voltage(1500) # mV units
 
 def write_dac(value):
   spi.xfer([value])  # write DAC register
 
 
 
-
-# # prepare plots for Exercise 4
-# adc_hist = [10,8,10,12]
-# bin_edges = [1,2,3,4,5]
-# lower_bound = 2
-# upper_bound = 4
-# figure, plot = plt.subplots(1, 1)
-# plot.stairs(adc_hist, bin_edges, fill=True)
-# plot.set_xticks(range(0, 260, 32))
-# plot.set_ylabel("Counts")
-# plot.axvline(x=lower_bound, color='red', linestyle='--')
-# plot.axvline(x=upper_bound, color='red', linestyle='--')
-
-# plt.show()
-
 GPIO.cleanup()