mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_NXP/TARGET_LPC176X/TARGET_UBLOX_C027/ublox_low_level_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 167:e84263d55307 1 /* mbed Microcontroller Library
AnnaBridge 167:e84263d55307 2 * Copyright (c) 2017 ARM Limited
AnnaBridge 167:e84263d55307 3 *
AnnaBridge 167:e84263d55307 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 167:e84263d55307 5 * you may not use this file except in compliance with the License.
AnnaBridge 167:e84263d55307 6 * You may obtain a copy of the License at
AnnaBridge 167:e84263d55307 7 *
AnnaBridge 167:e84263d55307 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 167:e84263d55307 9 *
AnnaBridge 167:e84263d55307 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 167:e84263d55307 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 167:e84263d55307 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 167:e84263d55307 13 * See the License for the specific language governing permissions and
AnnaBridge 167:e84263d55307 14 * limitations under the License.
AnnaBridge 167:e84263d55307 15 */
AnnaBridge 167:e84263d55307 16 #include <stdbool.h>
AnnaBridge 167:e84263d55307 17 #include "hal/us_ticker_api.h"
AnnaBridge 167:e84263d55307 18 #include "platform/mbed_wait_api.h"
AnnaBridge 167:e84263d55307 19 #include "gpio_api.h"
AnnaBridge 167:e84263d55307 20 #include "ublox_low_level_api.h"
AnnaBridge 167:e84263d55307 21
AnnaBridge 167:e84263d55307 22 static bool modemOn;
AnnaBridge 167:e84263d55307 23 static bool gpsOn;
AnnaBridge 167:e84263d55307 24
AnnaBridge 167:e84263d55307 25 void ublox_mdm_init(void)
AnnaBridge 167:e84263d55307 26 {
AnnaBridge 167:e84263d55307 27 gpio_t gpio;
AnnaBridge 167:e84263d55307 28 // start with modem disabled
AnnaBridge 167:e84263d55307 29 gpio_init_out_ex(&gpio, MDMEN, 0);
AnnaBridge 167:e84263d55307 30 gpio_init_out_ex(&gpio, MDMRST, 1);
AnnaBridge 167:e84263d55307 31 gpio_init_out_ex(&gpio, MDMPWRON, 1);
AnnaBridge 167:e84263d55307 32 gpio_init_out_ex(&gpio, MDMLVLOE, 1); // LVLEN: 1=disabled
AnnaBridge 167:e84263d55307 33 gpio_init_out_ex(&gpio, MDMILVLOE, 0); // ILVLEN: 0=disabled
AnnaBridge 167:e84263d55307 34 gpio_init_out_ex(&gpio, MDMUSBDET, 0);
AnnaBridge 167:e84263d55307 35 gpio_init_out_ex(&gpio, MDMRTS, 0);
AnnaBridge 167:e84263d55307 36 // start with gps disabled
AnnaBridge 167:e84263d55307 37 gpio_init_out_ex(&gpio, GPSEN, 0);
AnnaBridge 167:e84263d55307 38 gpio_init_out_ex(&gpio, GPSRST, 1);
AnnaBridge 167:e84263d55307 39 // led should be off
AnnaBridge 167:e84263d55307 40 gpio_init_out_ex(&gpio, LED, 0);
AnnaBridge 167:e84263d55307 41
AnnaBridge 167:e84263d55307 42 // Can't use wait_ms() as RTOS isn't initialised yet
AnnaBridge 167:e84263d55307 43 //wait_ms(50); // when USB cable is inserted the interface chip issues
AnnaBridge 167:e84263d55307 44 // Here's the code from the non-RTOS version
Anna Bridge 186:707f6e361f3e 45 us_ticker_init();
AnnaBridge 167:e84263d55307 46 uint32_t start = us_ticker_read();
AnnaBridge 167:e84263d55307 47 while ((us_ticker_read() - start) < 50000);
AnnaBridge 167:e84263d55307 48 }
AnnaBridge 167:e84263d55307 49
AnnaBridge 167:e84263d55307 50 // For forwards compatibility
AnnaBridge 167:e84263d55307 51 void ublox_mdm_power_on(int usb)
AnnaBridge 167:e84263d55307 52 {
AnnaBridge 167:e84263d55307 53 ublox_mdm_powerOn(usb);
AnnaBridge 167:e84263d55307 54 }
AnnaBridge 167:e84263d55307 55
AnnaBridge 167:e84263d55307 56 void ublox_mdm_powerOn(int usb)
AnnaBridge 167:e84263d55307 57 {
AnnaBridge 167:e84263d55307 58 gpio_t gpio;
AnnaBridge 167:e84263d55307 59 // turn on the mode by enabling power with power on pin low and correct USB detect level
AnnaBridge 167:e84263d55307 60 gpio_init_out_ex(&gpio, MDMUSBDET, usb ? 1 : 0); // USBDET: 0=disabled, 1=enabled
AnnaBridge 167:e84263d55307 61 if (!modemOn) { // enable modem
AnnaBridge 167:e84263d55307 62 gpio_init_out_ex(&gpio, MDMEN, 1); // LDOEN: 1=on
AnnaBridge 167:e84263d55307 63 wait_ms(1); // wait until supply switched off
AnnaBridge 167:e84263d55307 64 // now we can safely enable the level shifters
AnnaBridge 167:e84263d55307 65 gpio_init_out_ex(&gpio, MDMLVLOE, 0); // LVLEN: 0=enabled (uart/gpio)
AnnaBridge 167:e84263d55307 66 if (gpsOn)
AnnaBridge 167:e84263d55307 67 gpio_init_out_ex(&gpio, MDMILVLOE, 1); // ILVLEN: 1=enabled (i2c)
AnnaBridge 167:e84263d55307 68 }
AnnaBridge 167:e84263d55307 69 }
AnnaBridge 167:e84263d55307 70
AnnaBridge 167:e84263d55307 71 // For forwards compatibility
AnnaBridge 167:e84263d55307 72 void ublox_mdm_power_off()
AnnaBridge 167:e84263d55307 73 {
AnnaBridge 167:e84263d55307 74 ublox_mdm_powerOff();
AnnaBridge 167:e84263d55307 75 }
AnnaBridge 167:e84263d55307 76
AnnaBridge 167:e84263d55307 77 void ublox_mdm_powerOff(void)
AnnaBridge 167:e84263d55307 78 {
AnnaBridge 167:e84263d55307 79 gpio_t gpio;
AnnaBridge 167:e84263d55307 80 if (modemOn) {
AnnaBridge 167:e84263d55307 81 // diable all level shifters
AnnaBridge 167:e84263d55307 82 gpio_init_out_ex(&gpio, MDMILVLOE, 0); // ILVLEN: 0=disabled (i2c)
AnnaBridge 167:e84263d55307 83 gpio_init_out_ex(&gpio, MDMLVLOE, 1); // LVLEN: 1=disabled (uart/gpio)
AnnaBridge 167:e84263d55307 84 gpio_init_out_ex(&gpio,MDMUSBDET, 0); // USBDET: 0=disabled
AnnaBridge 167:e84263d55307 85 // now we can savely switch off the ldo
AnnaBridge 167:e84263d55307 86 gpio_init_out_ex(&gpio, MDMEN, 0); // LDOEN: 0=off
AnnaBridge 167:e84263d55307 87 modemOn = false;
AnnaBridge 167:e84263d55307 88 }
AnnaBridge 167:e84263d55307 89 }
AnnaBridge 167:e84263d55307 90
AnnaBridge 167:e84263d55307 91 void ublox_gps_powerOn(void)
AnnaBridge 167:e84263d55307 92 {
AnnaBridge 167:e84263d55307 93 gpio_t gpio;
AnnaBridge 167:e84263d55307 94 if (!gpsOn) {
AnnaBridge 167:e84263d55307 95 // switch on power supply
AnnaBridge 167:e84263d55307 96 gpio_init_out_ex(&gpio, GPSEN, 1); // LDOEN: 1=on
AnnaBridge 167:e84263d55307 97 wait_ms(1); // wait until supply switched off
AnnaBridge 167:e84263d55307 98 if (modemOn)
AnnaBridge 167:e84263d55307 99 gpio_init_out_ex(&gpio, MDMILVLOE, 1); // ILVLEN: 1=enabled (i2c)
AnnaBridge 167:e84263d55307 100 }
AnnaBridge 167:e84263d55307 101 }
AnnaBridge 167:e84263d55307 102
AnnaBridge 167:e84263d55307 103 void ublox_gps_powerOff(void)
AnnaBridge 167:e84263d55307 104 {
AnnaBridge 167:e84263d55307 105 gpio_t gpio;
AnnaBridge 167:e84263d55307 106 if (gpsOn) {
AnnaBridge 167:e84263d55307 107 gpio_init_out_ex(&gpio, MDMILVLOE, 0); // ILVLEN: 0=disabled (i2c)
AnnaBridge 167:e84263d55307 108 gpio_init_out_ex(&gpio, GPSEN, 0); // LDOEN: 0=off
AnnaBridge 167:e84263d55307 109 }
AnnaBridge 167:e84263d55307 110 }