u-blox / C027

Board support library for C027

Dependents:   IoTWorkshopLCD IoTWorkshopBuzzer IoTWorkshopSensors C027_USSDTest ... more

Fork of C027 by u-blox

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C027.cpp@20:89c45165ee87, 2014-05-09 (annotated)

Committer:
mazgch
Date:
Fri May 09 11:25:28 2014 +0000
Revision:
20:89c45165ee87
Parent:
19:61d31c12230d 
Remove pinlist (is now part of the platform)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mazgch 2:b7bd3660ff64 1 /* Platform source file, for the u-blox C27-C20/U20/G35
mazgch 2:b7bd3660ff64 2 * mbed Internet of Things Starter Kit
mazgch 2:b7bd3660ff64 3 * http://mbed.org/platforms/u-blox-C027/
mazgch 2:b7bd3660ff64 4 *
mazgch 2:b7bd3660ff64 5 */
mazgch 20:89c45165ee87 6 #if defined(TARGET_UBLOX_C027)
mazgch 19:61d31c12230d 7
mazgch 20:89c45165ee87 8 #include "C027.h"
mazgch 20:89c45165ee87 9
mazgch 6:e11bf54dd344 10 C027::C027() :
mazgch 16:3ce62caf4518 11 // Modem
mazgch 16:3ce62caf4518 12 mdmEn(MDMEN, 0), // LDO off
mazgch 16:3ce62caf4518 13 mdmRst(MDMRST, 1), // not reset
mazgch 16:3ce62caf4518 14 mdmPwrOn(MDMPWRON, 1), // Power On idle
mazgch 16:3ce62caf4518 15 mdmLvlOe(MDMLVLOE, 1), // GPIO/Serial velel shifters off
mazgch 16:3ce62caf4518 16 mdmILvlOe(MDMILVLOE, 0), // I2C Level shifter off
mazgch 16:3ce62caf4518 17 mdmUsbDet(MDMUSBDET, 0), // USB not used
mazgch 16:3ce62caf4518 18 // GPS
mazgch 16:3ce62caf4518 19 gpsEn(GPSEN, 0), // LDO off
mazgch 16:3ce62caf4518 20 gpsRst(GPSRST, 1) // not reset
mazgch 6:e11bf54dd344 21 {
mazgch 16:3ce62caf4518 22 DigitalOut led(LED, 0); // start with leds off
mazgch 16:3ce62caf4518 23 DigitalOut mdmRts(MDMRTS, 0); // make sure that rts is low
mazgch 16:3ce62caf4518 24
mazgch 6:e11bf54dd344 25 gpsIsEnabled = false;
mazgch 6:e11bf54dd344 26 mdmIsEnabled = false;
mazgch 14:e30f90b5447e 27 mdmUseUsb = false;
mazgch 6:e11bf54dd344 28 }
mazgch 6:e11bf54dd344 29
mazgch 6:e11bf54dd344 30 void C027::mdmPower(bool enable)
mazgch 6:e11bf54dd344 31 {
mazgch 7:e3eab86f1de9 32 if (!mdmIsEnabled && enable) // enable modem
mazgch 6:e11bf54dd344 33 {
mazgch 7:e3eab86f1de9 34 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 35 // we need the gps ldo for the level shifters of the modem
mazgch 16:3ce62caf4518 36 if (!gpsIsEnabled)
mazgch 16:3ce62caf4518 37 gpsEn = 1; // LDOEN(gps): 0=off -> 1=on
mazgch 7:e3eab86f1de9 38 #endif
mazgch 8:a356376db984 39 mdmLvlOe = 1; // LVLEN: 1=disabled
mazgch 13:fb30e9923a7b 40 mdmILvlOe = 0; // ILVLEN: 0=disabled
mazgch 16:3ce62caf4518 41 // turn on the mode by enabling power with power on pin low and correct USB detect level
mazgch 14:e30f90b5447e 42 mdmUsbDet = mdmUseUsb ? 1 : 0; // USBDET: 0=disabled, 1=enabled
mazgch 16:3ce62caf4518 43 mdmPwrOn = 0; // PWRON: 0=turn on
mazgch 16:3ce62caf4518 44 mdmEn = 1; // LDOEN: 1=on
mazgch 16:3ce62caf4518 45 wait_ms( 1); // wait until supply switched off
mazgch 16:3ce62caf4518 46 // mnake sure reset is also off
mazgch 16:3ce62caf4518 47 mdmRst = 1; // RESET: 0=not reset
mazgch 8:a356376db984 48 wait_ms(300); // power on sequence is triggered by keeping reset 50ms-300ms low
mazgch 14:e30f90b5447e 49 mdmPwrOn = 1; // PWRON: 0=turn on -> 1=idle
mazgch 7:e3eab86f1de9 50 mdmIsEnabled = true;
mazgch 10:bc9e2eb5daa8 51 // the interfaces of the modem should be fully ready after a certain period
mazgch 10:bc9e2eb5daa8 52 // LISA-U200 5000ms
mazgch 10:bc9e2eb5daa8 53 // SARA-G350 3000ms
mazgch 10:bc9e2eb5daa8 54 // LISA-C200
mazgch 10:bc9e2eb5daa8 55 wait_ms(1000);
mazgch 16:3ce62caf4518 56 // now we can safely enable the level shifters
mazgch 13:fb30e9923a7b 57 mdmLvlOe = 0; // LVLEN: 0=enabled (uart/gpio)
mazgch 13:fb30e9923a7b 58 if (gpsIsEnabled)
mazgch 13:fb30e9923a7b 59 mdmILvlOe = 1; // ILVLEN: 1=enabled (i2c)
mazgch 7:e3eab86f1de9 60 }
mazgch 7:e3eab86f1de9 61 else if (mdmIsEnabled && !enable) // disable modem
mazgch 7:e3eab86f1de9 62 {
mazgch 7:e3eab86f1de9 63 mdmIsEnabled = false;
mazgch 16:3ce62caf4518 64 // diable all level shifters
mazgch 13:fb30e9923a7b 65 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 13:fb30e9923a7b 66 mdmLvlOe = 1; // LVLEN: 1=disabled (uart/gpio)
mazgch 8:a356376db984 67 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 16:3ce62caf4518 68 // initiate power off sequence by setting PwnOn low for >1s
mazgch 8:a356376db984 69 mdmPwrOn = 0; // PWRON: 0=active
mazgch 8:a356376db984 70 wait_ms(1000); // send to sleep
mazgch 8:a356376db984 71 mdmPwrOn = 1; // PWRON: 0=active -> 1=idle
mazgch 7:e3eab86f1de9 72 // now we can savely switch off the ldo
mazgch 8:a356376db984 73 mdmEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 74 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 75 // the gps ldo may no longer be needed level shifters of the modem
mazgch 7:e3eab86f1de9 76 // so we switch it off if the gps is not enabled
mazgch 16:3ce62caf4518 77 if (!gpsIsEnabled)
mazgch 7:e3eab86f1de9 78 gpsEn = 0; // LDOEN(gps): 1=on -> 0=off
mazgch 7:e3eab86f1de9 79 #endif
mazgch 6:e11bf54dd344 80 }
mazgch 13:fb30e9923a7b 81
mazgch 6:e11bf54dd344 82 }
mazgch 6:e11bf54dd344 83
mazgch 14:e30f90b5447e 84 void C027::mdmUsbEnable(bool enable)
mazgch 14:e30f90b5447e 85 {
mazgch 14:e30f90b5447e 86 mdmUseUsb = enable;
mazgch 14:e30f90b5447e 87 if (mdmIsEnabled)
mazgch 14:e30f90b5447e 88 mdmUsbDet = mdmUseUsb ? 1 : 0;
mazgch 14:e30f90b5447e 89 }
mazgch 14:e30f90b5447e 90
mazgch 6:e11bf54dd344 91 void C027::mdmReset(void)
mazgch 6:e11bf54dd344 92 {
mazgch 8:a356376db984 93 if (mdmIsEnabled)
mazgch 8:a356376db984 94 {
mazgch 8:a356376db984 95 mdmRst = 0; // RESET: 0=reset
mazgch 8:a356376db984 96 // power on sequence is triggered by reset low
mazgch 8:a356376db984 97 // LISA-U200 50ms
mazgch 8:a356376db984 98 // SARA-G350 50ms
mazgch 8:a356376db984 99 // LISA-C200 300ms
mazgch 8:a356376db984 100 wait_ms(300);
mazgch 8:a356376db984 101 mdmRst = 1; // RESET: 0=reset -> 1=operating
mazgch 8:a356376db984 102 }
mazgch 8:a356376db984 103 }
mazgch 8:a356376db984 104
mazgch 8:a356376db984 105 void C027::mdmWakeup(void)
mazgch 8:a356376db984 106 {
mazgch 6:e11bf54dd344 107 if (mdmIsEnabled)
mazgch 6:e11bf54dd344 108 {
mazgch 8:a356376db984 109 mdmPwrOn = 0;
mazgch 8:a356376db984 110 // wakeup the device by low pulse:
mazgch 8:a356376db984 111 // LISA-U200 50-80us
mazgch 8:a356376db984 112 // SARA-G350 5ms
mazgch 16:3ce62caf4518 113 // LISA-C200 300ms
mazgch 16:3ce62caf4518 114 wait_ms(300);
mazgch 8:a356376db984 115 mdmPwrOn = 1;
mazgch 6:e11bf54dd344 116 }
mazgch 8:a356376db984 117 }
mazgch 8:a356376db984 118
mazgch 8:a356376db984 119 void C027::mdmSleep(void)
mazgch 8:a356376db984 120 {
mazgch 8:a356376db984 121 if (mdmIsEnabled)
mazgch 8:a356376db984 122 {
mazgch 8:a356376db984 123 mdmPwrOn = 0;
mazgch 8:a356376db984 124 // going to sleep is triggerd by low pulse:
mazgch 8:a356376db984 125 // LISA-U200 1000ms
mazgch 8:a356376db984 126 // SARA-G350 n/a
mazgch 8:a356376db984 127 // LISA-C200 n/a
mazgch 8:a356376db984 128 wait_ms(1000);
mazgch 8:a356376db984 129 mdmPwrOn = 1;
mazgch 8:a356376db984 130 }
mazgch 7:e3eab86f1de9 131 }
mazgch 7:e3eab86f1de9 132
mazgch 7:e3eab86f1de9 133 void C027::gpsPower(bool enable)
mazgch 7:e3eab86f1de9 134 {
mazgch 7:e3eab86f1de9 135 if (!gpsIsEnabled && enable) // enable gps
mazgch 7:e3eab86f1de9 136 {
mazgch 16:3ce62caf4518 137 // switch on power supply
mazgch 7:e3eab86f1de9 138 gpsEn = 1; // LDOEN: 0=off -> 1=on
mazgch 7:e3eab86f1de9 139 wait_ms(1); // wait until stable
mazgch 16:3ce62caf4518 140 // make sure we are not in reset
mazgch 7:e3eab86f1de9 141 gpsRst = 1; // RESET: 0=reset -> 1=operating
mazgch 7:e3eab86f1de9 142 gpsIsEnabled = true;
mazgch 7:e3eab86f1de9 143 // the gps schould be fully ready after 50ms
mazgch 13:fb30e9923a7b 144 if (mdmIsEnabled)
mazgch 13:fb30e9923a7b 145 mdmILvlOe = 1; // ILVLEN: 0=enabled (i2c)
mazgch 7:e3eab86f1de9 146 }
mazgch 7:e3eab86f1de9 147 else if (gpsIsEnabled && !enable) // diasble gps
mazgch 7:e3eab86f1de9 148 {
mazgch 7:e3eab86f1de9 149 gpsIsEnabled = false;
mazgch 13:fb30e9923a7b 150 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 7:e3eab86f1de9 151 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 152 // the gps ldo may have to remain enabled for the level shifters of the modem
mazgch 16:3ce62caf4518 153 if (!mdmIsEnabled)
mazgch 16:3ce62caf4518 154 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 155 #else
mazgch 13:fb30e9923a7b 156 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 157 #endif
mazgch 7:e3eab86f1de9 158 }
mazgch 6:e11bf54dd344 159 }
mazgch 6:e11bf54dd344 160
mazgch 6:e11bf54dd344 161 void C027::gpsReset(void)
mazgch 6:e11bf54dd344 162 {
mazgch 6:e11bf54dd344 163 if (gpsIsEnabled)
mazgch 6:e11bf54dd344 164 {
mazgch 6:e11bf54dd344 165 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 166 wait_ms(1);
mazgch 6:e11bf54dd344 167 gpsRst = 1; // RESET: 1=operating,0=reset
mazgch 6:e11bf54dd344 168 }
mazgch 6:e11bf54dd344 169 }
mazgch 19:61d31c12230d 170 #endif