/* * Copyright (c) 2017, Arm Limited and affiliates. * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "SARA4_PPP.h" #include "SARA4_PPP_CellularNetwork.h" #include "CellularUtil.h" #include "CellularLog.h" using namespace mbed; using namespace events; using namespace mbed_cellular_util; static const intptr_t cellular_properties[AT_CellularDevice::PROPERTY_MAX] = { AT_CellularNetwork::RegistrationModeLAC, // C_EREG AT_CellularNetwork::RegistrationModeLAC, // C_GREG AT_CellularNetwork::RegistrationModeDisable, // C_REG 0, // AT_CGSN_WITH_TYPE 0, // AT_CGDATA 1, // AT_CGAUTH 1, // AT_CNMI 1, // AT_CSMP 1, // AT_CMGF 1, // AT_CSDH 0, // PROPERTY_IPV4_STACK 0, // PROPERTY_IPV6_STACK 1, // PROPERTY_IPV4V6_STACK 0, // PROPERTY_NON_IP_PDP_TYPE 1, // PROPERTY_AT_CGEREP 1, // PROPERTY_AT_COPS_FALLBACK_AUTO 0, // PROPERTY_SOCKET_COUNT 0, // PROPERTY_IP_TCP 0, // PROPERTY_IP_UDP 0, // PROPERTY_AT_SEND_DELAY }; SARA4_PPP::SARA4_PPP(FileHandle *fh) : AT_CellularDevice(fh) { set_cellular_properties(cellular_properties); } AT_CellularNetwork *SARA4_PPP::open_network_impl(ATHandler &at) { return new SARA4_PPP_CellularNetwork(at, *this); } nsapi_error_t SARA4_PPP::set_power_save_mode(int periodic_time, int active_time) { _at.lock(); if (periodic_time == 0 && active_time == 0) { // disable PSM _at.at_cmd_discard("+CPSMS", "=0"); } else { const int PSMTimerBits = 5; /** Table 10.5.163a/3GPP TS 24.008: GPRS Timer 3 information element Bits 5 to 1 represent the binary coded timer value. Bits 6 to 8 defines the timer value unit for the GPRS timer as follows: 8 7 6 0 0 0 value is incremented in multiples of 10 minutes 0 0 1 value is incremented in multiples of 1 hour 0 1 0 value is incremented in multiples of 10 hours 0 1 1 value is incremented in multiples of 2 seconds 1 0 0 value is incremented in multiples of 30 seconds 1 0 1 value is incremented in multiples of 1 minute 1 1 0 value is incremented in multiples of 320 hours (NOTE 1) 1 1 1 value indicates that the timer is deactivated (NOTE 2). */ char pt[8 + 1]; // timer value encoded as 3GPP IE const int ie_value_max = 0x1f; uint32_t periodic_timer = 0; if (periodic_time <= 2 * ie_value_max) { // multiples of 2 seconds periodic_timer = periodic_time / 2; strcpy(pt, "01100000"); } else { if (periodic_time <= 30 * ie_value_max) { // multiples of 30 seconds periodic_timer = periodic_time / 30; strcpy(pt, "10000000"); } else { if (periodic_time <= 60 * ie_value_max) { // multiples of 1 minute periodic_timer = periodic_time / 60; strcpy(pt, "10100000"); } else { if (periodic_time <= 10 * 60 * ie_value_max) { // multiples of 10 minutes periodic_timer = periodic_time / (10 * 60); strcpy(pt, "00000000"); } else { if (periodic_time <= 60 * 60 * ie_value_max) { // multiples of 1 hour periodic_timer = periodic_time / (60 * 60); strcpy(pt, "00100000"); } else { if (periodic_time <= 10 * 60 * 60 * ie_value_max) { // multiples of 10 hours periodic_timer = periodic_time / (10 * 60 * 60); strcpy(pt, "01000000"); } else { // multiples of 320 hours int t = periodic_time / (320 * 60 * 60); if (t > ie_value_max) { t = ie_value_max; } periodic_timer = t; strcpy(pt, "11000000"); } } } } } } uint_to_binary_str(periodic_timer, &pt[3], sizeof(pt) - 3, PSMTimerBits); pt[8] = '\0'; /** Table 10.5.172/3GPP TS 24.008: GPRS Timer information element Bits 5 to 1 represent the binary coded timer value. Bits 6 to 8 defines the timer value unit for the GPRS timer as follows: 8 7 6 0 0 0 value is incremented in multiples of 2 seconds 0 0 1 value is incremented in multiples of 1 minute 0 1 0 value is incremented in multiples of decihours 1 1 1 value indicates that the timer is deactivated. Other values shall be interpreted as multiples of 1 minute in this version of the protocol. */ char at[8 + 1]; uint32_t active_timer; // timer value encoded as 3GPP IE if (active_time <= 2 * ie_value_max) { // multiples of 2 seconds active_timer = active_time / 2; strcpy(at, "00000000"); } else { if (active_time <= 60 * ie_value_max) { // multiples of 1 minute active_timer = (1 << 5) | (active_time / 60); strcpy(at, "00100000"); } else { // multiples of decihours int t = active_time / (6 * 60); if (t > ie_value_max) { t = ie_value_max; } active_timer = t; strcpy(at, "01000000"); } } uint_to_binary_str(active_timer, &at[3], sizeof(at) - 3, PSMTimerBits); at[8] = '\0'; // request for both GPRS and LTE _at.at_cmd_discard("+CPSMS", "=1,,,", "%s%s", pt, at); if (_at.get_last_error() != NSAPI_ERROR_OK) { tr_warn("Power save mode not enabled!"); } else { // network may not agree with power save options but // that should be fine as timeout is not longer than requested } } return _at.unlock_return_error(); } #if MBED_CONF_SARA4_PPP_PROVIDE_DEFAULT #include "drivers/BufferedSerial.h" CellularDevice *CellularDevice::get_default_instance() { static BufferedSerial serial(MBED_CONF_SARA4_PPP_TX, MBED_CONF_SARA4_PPP_RX, MBED_CONF_SARA4_PPP_BAUDRATE); #if defined (MBED_CONF_SARA4_PPP_RTS) && defined (MBED_CONF_SARA4_PPP_CTS) tr_debug("SARA4_PPP flow control: RTS %d CTS %d", MBED_CONF_SARA4_PPP_RTS, MBED_CONF_SARA4_PPP_CTS); serial.set_flow_control(SerialBase::RTSCTS, MBED_CONF_SARA4_PPP_RTS, MBED_CONF_SARA4_PPP_CTS); #endif static SARA4_PPP device(&serial); return &device; } #endif