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samples: intel_s1000: script to control from host

Add python script and associated configuration YAML file
to control audio sample application running on
Intel Sue Creek S1000 from a Linux host.

Signed-off-by: Sathish Kuttan <sathish.k.kuttan@intel.com>
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sathishkuttan authored and nashif committed Jun 29, 2019
1 parent 192ca06 commit a4c3de16f2379cc40bebf46f78b10be4812fef7c
Showing with 99 additions and 0 deletions.
  1. +87 −0 samples/boards/intel_s1000_crb/audio/audio.py
  2. +12 −0 samples/boards/intel_s1000_crb/audio/config.yml
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#!/usr/bin/env python3
#
# Copyright (c) 2019 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
# Author: Sathish Kuttan <sathish.k.kuttan@intel.com>

# This script sends a command to either start or stop audio streams
# to an Intel Sue Creek S1000 target connected to a Linux host
# over USB.
# The target should be running the sample audio application from the
# sample project to which this script belongs.

import hid
import yaml
import os
import argparse

class Device:
def __init__(self):
"""
Reads configuration file to determine the USB VID/PID of
the Sue Creek target.
When the script is run using sudo permission, the
manufacturer and product strings are printed
"""
config_file = os.path.dirname(__file__)
if len(config_file) != 0:
config_file += '/'
config_file += 'config.yml'
with open(config_file, 'r') as ymlfile:
config = yaml.safe_load(ymlfile)
self.name = config['general']['name']
self.usb_vid = config['usb']['vid']
self.usb_pid = config['usb']['pid']
self.hid_dev = hid.device()
if self.hid_dev == None:
print('Device not found')
else:
self.hid_dev.open(self.usb_vid, self.usb_pid)

def start_audio(self):
"""
Sends a command to start the audio transfers
in the Sue Creek target.
"""
# space for 1 byte report id, 2 bytes of padding and 1 byte report size
command = 'start_audio'.encode('utf-8') + b'\x00'
command += b'\x00' * (56 - len(command))
cmd_len = len(command) // 4 + 1
command = b'\x01\x00' + cmd_len.to_bytes(2, byteorder='little') + \
command
command = b'\x01\x00\x00\x38' + command
print('Starting Audio on %s ...' % self.hid_dev.get_product_string())
self.hid_dev.send_feature_report(command)
self.hid_dev.read(len(command))

def stop_audio(self):
"""
Sends a command to stop the running audio transfers
in the Sue Creek target.
"""
# space for 1 byte report id, 2 bytes of padding and 1 byte report size
command = 'stop_audio'.encode('utf-8') + b'\x00'
command += b'\x00' * (56 - len(command))
cmd_len = len(command) // 4 + 1
command = b'\x02\x00' + cmd_len.to_bytes(2, byteorder='little') + \
command
command = b'\x01\x00\x00\x38' + command
print('Stopping Audio on %s ...' % self.hid_dev.get_product_string())
self.hid_dev.send_feature_report(command)
self.hid_dev.read(len(command))

def main():
parser = argparse.ArgumentParser(epilog='NOTE: use sudo -E %(prog)s to run the script')
parser.add_argument('command', choices=['start', 'stop'],
help='start or stop audio streams')
args = parser.parse_args()
sue_creek = Device()
if args.command == 'start':
sue_creek.start_audio()
if args.command == 'stop':
sue_creek.stop_audio()

if __name__ == '__main__':
main()
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# Copyright (c) 2019 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
# Author: Sathish Kuttan <sathish.k.kuttan@intel.com>

general:
name: Sue Creek

usb:
vid: 0x8087 # Vendor ID: Intel Corporation
pid: 0x0b1a # Product ID

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