rpc_server_serial.c


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/*
 * rpc_server_serial.c
 * -------------------
 * Remote procedure call transport over serial line with SLIP framing.
 *
 * Copyright (c) 2016, NORDUnet A/S All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the NORDUnet nor the names of its contributors may
 *   be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "hal.h"
#include "hal_internal.h"
#include "slip_internal.h"

hal_error_t hal_rpc_server_transport_init(void)
{
    return HAL_OK;
}

hal_error_t hal_rpc_server_transport_close(void)
{
    return HAL_OK;
}

hal_error_t hal_rpc_sendto(const uint8_t * const buf, const size_t len, void *opaque)
{
    return hal_slip_send(buf, len);
}

hal_error_t hal_rpc_recvfrom(uint8_t * const buf, size_t * const len, void **opaque)
{
    return hal_slip_recv(buf, len, *len);
}
#!/usr/bin/python
#
# Copyright (c) 2016, NORDUnet A/S All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# - Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
# - Neither the name of the NORDUnet nor the names of its contributors may
#   be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
Utility to test file upload (or FPGA bitstream upload.
"""
import os
import sys
import time
import struct
import serial
import argparse

from binascii import crc32

CHUNK_SIZE = 256
DFU_CHUNK_SIZE = 256
FPGA_CHUNK_SIZE = 4096


def parse_args():
    """
    Parse the command line arguments
    """
    parser = argparse.ArgumentParser(description = "File uploader",
                                     add_help = True,
                                     formatter_class = argparse.ArgumentDefaultsHelpFormatter,
                                     )

    parser.add_argument('--fpga',
                        dest='fpga',
                        action='store_true', default=False,
                        help='Perform FPGA bitstream upload',
                        )
    parser.add_argument('--dfu',
                        dest='dfu',
                        action='store_true', default=False,
                        help='Perform DFU application upload',
                        )

    parser.add_argument('--device',
                        dest='device',
                        default='/dev/ttyUSB0',
                        help='Name of management port USB serial device',
                        )

    # positional argument(s)
    parser.add_argument('filename')

    return parser.parse_args()


def _write(dst, data):
    dst.write(data)
    if len(data) == 4:
        print("Wrote 0x{!s}".format(data.encode('hex')))
    else:
        print("Wrote {!r}".format(data))


def _read(dst):
    res = ''
    while True:
        x = dst.read(1)
        if not x:
            break
        res += x
    print ("Read {!r}".format(res))
    return res


def _execute(dst, cmd):
    _write(dst, '\r')
    prompt = _read(dst)
    if prompt.endswith('Username: '):
        _write(dst, 'ct\r')
        prompt = _read(dst)
    if prompt.endswith('Password: '):
        _write(dst, 'ct\r')
        prompt = _read(dst)
    if not prompt.endswith('> '):
        sys.stderr.write('Device does not seem to be ready for a file transfer (got {!r})\n'.format(prompt))
        return False
    _write(dst, cmd + '\r')
    response = _read(dst)
    return response

def send_file(filename, args, dst):
    s = os.stat(filename)
    size = s.st_size
    src = open(filename, 'rb')
    if args.fpga:
        # Skip header in FPGA bitstream file
        size -= 0x64
        src.read(0x64)
        chunk_size = FPGA_CHUNK_SIZE
        response = _execute(dst, 'fpga bitstream upload')
    elif args.dfu:
        chunk_size = DFU_CHUNK_SIZE
        response = _execute(dst, 'dfu upload')
    else:
        chunk_size = CHUNK_SIZE
        response = _execute(dst, 'filetransfer')
    if 'OK' not in response:
        sys.stderr.write('Device did not accept the upload command (got {!r})\n'.format(response))
        return False

    crc = 0
    counter = 0
    # 1. Write size of file (4 bytes)
    _write(dst, struct.pack('<I', size))
    _read(dst)
    # 2. Write file contents while calculating CRC-32
    while True:
        data = src.read(chunk_size)
        if not data:
            break
        dst.write(data)
        print("Wrote {!s} bytes (chunk {!s}/{!s})".format(len(data), counter, int(size / chunk_size)))
        # read ACK (a counter of number of 4k chunks received)
        while True:
            ack_bytes = dst.read(4)
            if len(ack_bytes) == 4:
                break
            print('ERROR: Did not receive an ACK, got {!r}'.format(ack_bytes))
            dst.write('\r')  # eventually get back to the CLI prompt
        ack = struct.unpack('<I', ack_bytes)[0]
        if ack != counter + 1:
            print('ERROR: Did not receive the expected counter as ACK (got {!r}/{!r}, not {!r})'.format(ack, ack_bytes, counter))
            flush = dst.read(100)
            print('FLUSH data: {!r}'.format(flush))
            return False
        counter += 1

        crc = crc32(data, crc) & 0xffffffff

    _read(dst)

    # 3. Write CRC-32 (4 bytes)
    _write(dst, struct.pack('<I', crc))
    _read(dst)

    src.close()
    return True


def main(args):
    dst = serial.Serial(args.device, 921600, timeout=2)
    send_file(args.filename, args, dst)
    dst.close()
    return True

if __name__ == '__main__':
    try:
        args = parse_args()
        if main(args):
            sys.exit(0)
        sys.exit(1)
    except KeyboardInterrupt:
        pass