I2S control

Requirements

None

Description

This example shows how to run GVSOC with a telnet proxy opened, and how to connect a python script to it to control the behavior of the I2S testbench dynamically.

Code

PythonC

#!/usr/bin/env python3

import os
import argparse
import gv.gvsoc_control as gvsoc
import time

#time.sleep(3)

script_path = os.path.dirname(__file__)
parser = argparse.ArgumentParser(description='Control GVSOC')

parser.add_argument("--host", dest="host", default="localhost", help="Specify host name")
parser.add_argument("--port", dest="port", default=30000, type=int, help="Specify host port")

args = parser.parse_args()


for i in range(0,10):
    try:
        gv = gvsoc.Proxy(args.host, args.port)
    except ConnectionRefusedError:
        print("waiting for socket to open...retry #"+str(i)+"...")
        time.sleep(1)
        continue
    break

testbench = gvsoc.Testbench(gv)

# Open SAI 0 interface
i2s_0 = testbench.i2s_get(0)

i2s_0.open(sampling_freq=44100, word_size=16, nb_slots=1, is_ext_clk=True, is_ext_ws=True)

# Setup slot 0 RX with input wav file
i2s_0.slot_open(slot=0, is_rx=True, word_size=16, is_msb=True, sign_extend=False, left_align=False)
i2s_0.slot_rx_file_reader(slot=0, filetype="wav", filepath=script_path+'/sound_0.wav')

# Setup slot 0 TX with output wav file. The test will open it with a loopback to redirect sdi to sdo
i2s_0.slot_open(slot=0, is_rx=False, word_size=16, is_msb=True, sign_extend=False, left_align=False)
i2s_0.slot_tx_file_dumper(slot=0, filetype="wav", filepath=script_path+'/sound_out.wav')

# Start the clock
i2s_0.clk_start()

# Run for 1 s
gv.run(3000000000000)

# Stop the clock and the RX slot
i2s_0.slot_stop(slot=0, stop_rx=True, stop_tx=False)
i2s_0.clk_stop()

# Run for 10 ms
gv.run(10000000000)

# Now continue with a different file
i2s_0.slot_rx_file_reader(slot=0, filetype="wav", filepath=script_path+'/sound_1.wav')
i2s_0.clk_start()

# Run for 1 s
gv.run(1000000000000)

# Stop everything and quit
i2s_0.clk_stop()
i2s_0.slot_close(slot=0)
i2s_0.close()

gv.quit()
gv.close()