workingUltrasonicTracebuffer.py

import time
from pprint import pprint
from pynq import PL
from pynq import Overlay
from pynq.drivers import Trace_Buffer
from pynq.iop import Pmod_TMP2
from pynq.iop import PMODA
from pynq.iop import PMODB
from pynq.iop import ARDUINO
from pynq.iop import iop_const
from pynq.iop import DevMode
from pynq.iop import Arduino_IO
from pynq.iop import Pmod_IO
from pynq import Overlay
Overlay("base.bit").download()


tmp2 = Pmod_TMP2(PMODA)
tmp2.set_log_interval_ms(1)

trigPin = Arduino_IO(ARDUINO, 0, "out")
## Samples at million samples / sec
tBuf = Trace_Buffer(PMODA,
                    pins      = [0],
                    probes    = ['Echo'],
                    protocol  = "i2c",
                    rate      = 1000000)

trigPin.write(0)
time.sleep(1)

tBuf.start()
trigPin.write(1)
time.sleep(0.00001)
trigPin.write(0)

# Issue reads for 1 second
tmp2.start_log()
time.sleep(1)
tmp2_log = tmp2.get_log()

# Stop the trace buffer
tBuf.stop()

# Set up samples
start = 1500
stop = 4500

# Parsing and decoding samples
tBuf.parse("i2c_trace.csv", start, stop)
#tr_buf.decode("i2c_trace.pd")

tBuf.display()