/* mbed Microcontroller Library * Copyright (c) 2018 ARM Limited * 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. */ #if MBED_CONF_NSAPI_PRESENT #include "ONBOARD_SARA4_PPP.h" #include "gpio_api.h" #include "platform/mbed_thread.h" #include "PinNames.h" #include "drivers/BufferedSerial.h" #include "CellularLog.h" #include "mbed_wait_api.h" using namespace mbed; ONBOARD_SARA4_PPP::ONBOARD_SARA4_PPP(FileHandle *fh) : SARA4_PPP(fh) { } nsapi_error_t ONBOARD_SARA4_PPP::hard_power_on() { onboard_modem_init(); return NSAPI_ERROR_OK; } nsapi_error_t ONBOARD_SARA4_PPP::hard_power_off() { onboard_modem_deinit(); return NSAPI_ERROR_OK; } nsapi_error_t ONBOARD_SARA4_PPP::soft_power_on() { onboard_modem_power_up(); return NSAPI_ERROR_OK; } nsapi_error_t ONBOARD_SARA4_PPP::soft_power_off() { onboard_modem_power_down(); return NSAPI_ERROR_OK; } CellularDevice *CellularDevice::get_target_default_instance() { static BufferedSerial serial(MDMTXD, MDMRXD, 115200); #if DEVICE_SERIAL_FC if (MDMRTS != NC && MDMCTS != NC) { tr_debug("Modem flow control: RTS %d CTS %d", MDMRTS, MDMCTS); serial.set_flow_control(SerialBase::RTSCTS, MDMRTS, MDMCTS); } #endif static ONBOARD_SARA4_PPP device(&serial); return &device; } void ONBOARD_SARA4_PPP::press_power_button(int time_us) { gpio_t gpio; gpio_init_out_ex(&gpio, MDMPWRON, 1); wait_us(time_us); gpio_write(&gpio, 0); } void ONBOARD_SARA4_PPP::onboard_modem_init() { gpio_t gpio; // Take us out of reset gpio_init_inout(&gpio, RADIO_PWR, PIN_OUTPUT, PushPullNoPull, 1); gpio_init_inout(&gpio, BUF_EN, PIN_OUTPUT, OpenDrainNoPull, 0); gpio_init_out_ex(&gpio, MDMRST, 0); gpio_init_out_ex(&gpio, MDMPWRON, 0); gpio_init_inout(&gpio, RADIO_DTR, PIN_OUTPUT, OpenDrainNoPull, 0); } void ONBOARD_SARA4_PPP::onboard_modem_deinit() { onboard_modem_power_down(); gpio_t gpio; // Back into reset gpio_init_out_ex(&gpio, MDMRST, 1); gpio_init_out_ex(&gpio, MDMPWRON, 1); gpio_init_inout(&gpio, BUF_EN, PIN_OUTPUT, OpenDrainNoPull, 1); gpio_init_inout(&gpio, RADIO_PWR, PIN_OUTPUT, PushPullNoPull, 0); gpio_init_inout(&gpio, RADIO_DTR, PIN_OUTPUT, OpenDrainNoPull, 1); } void ONBOARD_SARA4_PPP::onboard_modem_power_up() { onboard_modem_init(); gpio_t gpio; gpio_init_in(&gpio, MON_1V8); if(gpio_is_connected(&gpio) && !gpio_read(&gpio)) { unsigned int i = 0; while(i < 3) { press_power_button(150000); thread_sleep_for(250); if(gpio_read(&gpio)) { break; } i++; } } } void ONBOARD_SARA4_PPP::onboard_modem_power_down() { /* Activate PWR_ON for 1.5s to switch off */ press_power_button(1500000); // check for 1.8v low if not, take reset low for 10s } #endif // MBED_CONF_NSAPI_PRESENT