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SignalPlotter.py
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SignalPlotter.py
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import time
import JLinkWrapper
import IOCParser
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
class Plotter:
def __init__(self, ioc, jlink, elfreader):
self._ioc = ioc
self._jlink = jlink
self._elfreader = elfreader
def _read_gpio(self):
gpio_data = dict()
input_reg_data = dict()
output_reg_data = dict()
for i in self._ioc.inputGpios:
input_reg_data[i] = self._jlink.read_register(i, 'IDR')
for o in self._ioc.outputGpios:
output_reg_data[o] = self._jlink.read_register(o, 'ODR')
for sig in self._ioc.signals:
if self._ioc.signals[sig] == 'GPIO_Input':
gpio_data[sig] = (input_reg_data[self._ioc.gpio[sig]] >> self._ioc.pin_num[sig]) & 1
if self._ioc.signals[sig] == 'GPIO_Output':
gpio_data[sig] = (output_reg_data[self._ioc.gpio[sig]] >> self._ioc.pin_num[sig]) & 1
return gpio_data
def plot_gpio(self, time_sec, delta_sec):
x_vals = []
y_vals = [[] for i in range(len(self._ioc.signals))]
start_time = time.time()
while (time.time() - start_time) < time_sec:
sample_time = time.time()
x_vals.append(sample_time - start_time)
data = self._read_gpio()
idx = 0
for val in data:
y_vals[idx].append(data[val])
idx += 1
time_to_sleep = delta_sec - (time.time() - sample_time)
if time_to_sleep > 0:
time.sleep(time_to_sleep)
else:
print('Missed sample point by ' + str(time_to_sleep * -1) + ' seconds')
# TODO: Create data in second thread and update once per second?
_, ax = plt.subplots(len(self._ioc.digital_signals), sharex=True)
if len(self._ioc.digital_signals) > 1:
io_num = 0
for sig in self._ioc.digital_signals:
ax[io_num].cla()
ax[io_num].set_title(sig + ' (' + self._ioc.labels[sig] + ') [' + self._ioc.signals[sig] + ']')
ax[io_num].set_ylim([-0.2, 1.2])
ax[io_num].set_yticks([0,1])
ax[io_num].step(x_vals, y_vals[io_num])
io_num += 1
else:
sig = next(iter(self._ioc.digital_signals.keys()))
ax.cla()
ax.set_title(sig + ' (' + self._ioc.labels[sig] + ') [' + self._ioc.signals[sig] + ']')
ax.set_ylim([-0.2, 1.2])
ax.set_yticks([0,1])
ax.step(x_vals, y_vals[0])
plt.subplots_adjust(hspace=1)
plt.xlabel('time (sec)')
plt.show()
def plot_adc(self, time_sec, delta_sec):
addr = self._elfreader.getAddressOfSym('adcBuffer')
size = self._elfreader.getSizeOfSym('adcBuffer')
num_elem = int(size / 2)
x_vals = []
y_vals = [[] for i in range(num_elem)]
start_time = time.time()
while (time.time() - start_time) < time_sec:
sample_time = time.time()
x_vals.append(sample_time - start_time)
data = self._jlink.memory_read16(addr, num_elem)
idx = 0
for val in data:
y_vals[idx].append(val)
idx += 1
time_to_sleep = delta_sec - (time.time() - sample_time)
if time_to_sleep > 0:
time.sleep(time_to_sleep)
else:
print('Missed sample point by ' + str(time_to_sleep * -1) + ' seconds')
# TODO: Create data in second thread and update once per second?
_, ax = plt.subplots(num_elem, sharex=True)
if num_elem > 1:
io_num = 0
# first print all signals of first ADC, then go to the next and so on...
for adc in self._ioc.adcs:
for sig in self._ioc.adcs[adc].regularConversionPins:
ax[io_num].cla()
ax[io_num].set_title(self._gen_adc_title(sig))
ax[io_num].plot(x_vals, y_vals[io_num])
io_num += 1
else:
# Print single signal
sig = next(iter(self._ioc.analog_signals.keys()))
ax.cla()
ax.set_title(self._gen_adc_title(sig))
ax.plot(x_vals, y_vals[0])
plt.subplots_adjust(hspace=1)
plt.xlabel('time (sec)')
plt.show()
def _gen_adc_title(self, sig):
titlestr = sig
if sig in self._ioc.labels:
titlestr += ' (' + self._ioc.labels[sig] + ')'
if sig in self._ioc.signals:
titlestr += ' [' + self._ioc.signals[sig] + ']'
return titlestr
#def animate_gpio_plot(i, jlink):
# odr_val = jlink.read_register('GPIOA', 'ODR')
#
# x_vals.append(i)
#
# io_num = 0
#
# for p in ax:
# y_vals[io_num].append((odr_val >> io_num) & 1)
# p.cla()
# p.set_title('Bit ' + str(io_num))
# p.step(x_vals, y_vals[io_num])
# io_num += 1
#
# #for row in ax:
# # row.scatter(i, (odr_val >> pin) & 1)
# # pin += 1
# plt.tight_layout()
#def plot_gpio(time, delta):
# global ax
# global y_vals
#
# # TODO: Create data in second thread and update once per second?
# fig,ax = plt.subplots(8)
#
# for i in range(8):
# y_vals.append([])
#
# ani = FuncAnimation(plt.gcf(), animate_gpio_plot, interval=delta)
#
# plt.tight_layout()
# plt.show()
#def plot_gpio(time, delta):
# fig, ax = plt.subplots(8, sharex=True)
# fig.suptitle('Bla')
# for i in range(time):
# odr_val = read_register('GPIOA', 'ODR')
# pin = 0
# for row in ax:
# row.scatter(i, (odr_val >> pin) & 1)
# pin += 1
# plt.pause(0.05)
#