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@17:8ca897c3cf41, 2014-04-08 (annotated)

Committer:
mazgch
Date:
Tue Apr 08 12:38:34 2014 +0000
Revision:
17:8ca897c3cf41
Parent:
16:3ce62caf4518
Child:
19:61d31c12230d
fix legacy 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 2:b7bd3660ff64 6
mazgch 2:b7bd3660ff64 7 #include "C027.h"
mazgch 2:b7bd3660ff64 8
mazgch 16:3ce62caf4518 9 #ifndef TARGET_UBLOX_C027
mazgch 16:3ce62caf4518 10 // override the mbed_die function
mazgch 2:b7bd3660ff64 11 void mbed_die(void)
mazgch 2:b7bd3660ff64 12 {
mazgch 8:a356376db984 13 DigitalOut led(LED);
mazgch 17:8ca897c3cf41 14 __disable_irq();
mazgch 16:3ce62caf4518 15 for (;;)
mazgch 2:b7bd3660ff64 16 {
mazgch 16:3ce62caf4518 17 // nothing to do here
mazgch 16:3ce62caf4518 18 led = 0;
mazgch 16:3ce62caf4518 19 wait_ms(200);
mazgch 16:3ce62caf4518 20 led = 1;
mazgch 16:3ce62caf4518 21 wait_ms(200);
mazgch 2:b7bd3660ff64 22 }
mazgch 2:b7bd3660ff64 23 }
mazgch 16:3ce62caf4518 24 #endif
mazgch 2:b7bd3660ff64 25
mazgch 6:e11bf54dd344 26 C027::C027() :
mazgch 16:3ce62caf4518 27 // Modem
mazgch 16:3ce62caf4518 28 mdmEn(MDMEN, 0), // LDO off
mazgch 16:3ce62caf4518 29 mdmRst(MDMRST, 1), // not reset
mazgch 16:3ce62caf4518 30 mdmPwrOn(MDMPWRON, 1), // Power On idle
mazgch 16:3ce62caf4518 31 mdmLvlOe(MDMLVLOE, 1), // GPIO/Serial velel shifters off
mazgch 16:3ce62caf4518 32 mdmILvlOe(MDMILVLOE, 0), // I2C Level shifter off
mazgch 16:3ce62caf4518 33 mdmUsbDet(MDMUSBDET, 0), // USB not used
mazgch 16:3ce62caf4518 34 // GPS
mazgch 16:3ce62caf4518 35 gpsEn(GPSEN, 0), // LDO off
mazgch 16:3ce62caf4518 36 gpsRst(GPSRST, 1) // not reset
mazgch 6:e11bf54dd344 37 {
mazgch 16:3ce62caf4518 38 DigitalOut led(LED, 0); // start with leds off
mazgch 16:3ce62caf4518 39 DigitalOut mdmRts(MDMRTS, 0); // make sure that rts is low
mazgch 16:3ce62caf4518 40
mazgch 6:e11bf54dd344 41 gpsIsEnabled = false;
mazgch 6:e11bf54dd344 42 mdmIsEnabled = false;
mazgch 14:e30f90b5447e 43 mdmUseUsb = false;
mazgch 6:e11bf54dd344 44 }
mazgch 6:e11bf54dd344 45
mazgch 6:e11bf54dd344 46 void C027::mdmPower(bool enable)
mazgch 6:e11bf54dd344 47 {
mazgch 7:e3eab86f1de9 48 if (!mdmIsEnabled && enable) // enable modem
mazgch 6:e11bf54dd344 49 {
mazgch 7:e3eab86f1de9 50 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 51 // we need the gps ldo for the level shifters of the modem
mazgch 16:3ce62caf4518 52 if (!gpsIsEnabled)
mazgch 16:3ce62caf4518 53 gpsEn = 1; // LDOEN(gps): 0=off -> 1=on
mazgch 7:e3eab86f1de9 54 #endif
mazgch 8:a356376db984 55 mdmLvlOe = 1; // LVLEN: 1=disabled
mazgch 13:fb30e9923a7b 56 mdmILvlOe = 0; // ILVLEN: 0=disabled
mazgch 16:3ce62caf4518 57 // turn on the mode by enabling power with power on pin low and correct USB detect level
mazgch 14:e30f90b5447e 58 mdmUsbDet = mdmUseUsb ? 1 : 0; // USBDET: 0=disabled, 1=enabled
mazgch 16:3ce62caf4518 59 mdmPwrOn = 0; // PWRON: 0=turn on
mazgch 16:3ce62caf4518 60 mdmEn = 1; // LDOEN: 1=on
mazgch 16:3ce62caf4518 61 wait_ms( 1); // wait until supply switched off
mazgch 16:3ce62caf4518 62 // mnake sure reset is also off
mazgch 16:3ce62caf4518 63 mdmRst = 1; // RESET: 0=not reset
mazgch 8:a356376db984 64 wait_ms(300); // power on sequence is triggered by keeping reset 50ms-300ms low
mazgch 14:e30f90b5447e 65 mdmPwrOn = 1; // PWRON: 0=turn on -> 1=idle
mazgch 7:e3eab86f1de9 66 mdmIsEnabled = true;
mazgch 10:bc9e2eb5daa8 67 // the interfaces of the modem should be fully ready after a certain period
mazgch 10:bc9e2eb5daa8 68 // LISA-U200 5000ms
mazgch 10:bc9e2eb5daa8 69 // SARA-G350 3000ms
mazgch 10:bc9e2eb5daa8 70 // LISA-C200
mazgch 10:bc9e2eb5daa8 71 wait_ms(1000);
mazgch 16:3ce62caf4518 72 // now we can safely enable the level shifters
mazgch 13:fb30e9923a7b 73 mdmLvlOe = 0; // LVLEN: 0=enabled (uart/gpio)
mazgch 13:fb30e9923a7b 74 if (gpsIsEnabled)
mazgch 13:fb30e9923a7b 75 mdmILvlOe = 1; // ILVLEN: 1=enabled (i2c)
mazgch 7:e3eab86f1de9 76 }
mazgch 7:e3eab86f1de9 77 else if (mdmIsEnabled && !enable) // disable modem
mazgch 7:e3eab86f1de9 78 {
mazgch 7:e3eab86f1de9 79 mdmIsEnabled = false;
mazgch 16:3ce62caf4518 80 // diable all level shifters
mazgch 13:fb30e9923a7b 81 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 13:fb30e9923a7b 82 mdmLvlOe = 1; // LVLEN: 1=disabled (uart/gpio)
mazgch 8:a356376db984 83 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 16:3ce62caf4518 84 // initiate power off sequence by setting PwnOn low for >1s
mazgch 8:a356376db984 85 mdmPwrOn = 0; // PWRON: 0=active
mazgch 8:a356376db984 86 wait_ms(1000); // send to sleep
mazgch 8:a356376db984 87 mdmPwrOn = 1; // PWRON: 0=active -> 1=idle
mazgch 7:e3eab86f1de9 88 // now we can savely switch off the ldo
mazgch 8:a356376db984 89 mdmEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 90 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 91 // the gps ldo may no longer be needed level shifters of the modem
mazgch 7:e3eab86f1de9 92 // so we switch it off if the gps is not enabled
mazgch 16:3ce62caf4518 93 if (!gpsIsEnabled)
mazgch 7:e3eab86f1de9 94 gpsEn = 0; // LDOEN(gps): 1=on -> 0=off
mazgch 7:e3eab86f1de9 95 #endif
mazgch 6:e11bf54dd344 96 }
mazgch 13:fb30e9923a7b 97
mazgch 6:e11bf54dd344 98 }
mazgch 6:e11bf54dd344 99
mazgch 14:e30f90b5447e 100 void C027::mdmUsbEnable(bool enable)
mazgch 14:e30f90b5447e 101 {
mazgch 14:e30f90b5447e 102 mdmUseUsb = enable;
mazgch 14:e30f90b5447e 103 if (mdmIsEnabled)
mazgch 14:e30f90b5447e 104 mdmUsbDet = mdmUseUsb ? 1 : 0;
mazgch 14:e30f90b5447e 105 }
mazgch 14:e30f90b5447e 106
mazgch 6:e11bf54dd344 107 void C027::mdmReset(void)
mazgch 6:e11bf54dd344 108 {
mazgch 8:a356376db984 109 if (mdmIsEnabled)
mazgch 8:a356376db984 110 {
mazgch 8:a356376db984 111 mdmRst = 0; // RESET: 0=reset
mazgch 8:a356376db984 112 // power on sequence is triggered by reset low
mazgch 8:a356376db984 113 // LISA-U200 50ms
mazgch 8:a356376db984 114 // SARA-G350 50ms
mazgch 8:a356376db984 115 // LISA-C200 300ms
mazgch 8:a356376db984 116 wait_ms(300);
mazgch 8:a356376db984 117 mdmRst = 1; // RESET: 0=reset -> 1=operating
mazgch 8:a356376db984 118 }
mazgch 8:a356376db984 119 }
mazgch 8:a356376db984 120
mazgch 8:a356376db984 121 void C027::mdmWakeup(void)
mazgch 8:a356376db984 122 {
mazgch 6:e11bf54dd344 123 if (mdmIsEnabled)
mazgch 6:e11bf54dd344 124 {
mazgch 8:a356376db984 125 mdmPwrOn = 0;
mazgch 8:a356376db984 126 // wakeup the device by low pulse:
mazgch 8:a356376db984 127 // LISA-U200 50-80us
mazgch 8:a356376db984 128 // SARA-G350 5ms
mazgch 16:3ce62caf4518 129 // LISA-C200 300ms
mazgch 16:3ce62caf4518 130 wait_ms(300);
mazgch 8:a356376db984 131 mdmPwrOn = 1;
mazgch 6:e11bf54dd344 132 }
mazgch 8:a356376db984 133 }
mazgch 8:a356376db984 134
mazgch 8:a356376db984 135 void C027::mdmSleep(void)
mazgch 8:a356376db984 136 {
mazgch 8:a356376db984 137 if (mdmIsEnabled)
mazgch 8:a356376db984 138 {
mazgch 8:a356376db984 139 mdmPwrOn = 0;
mazgch 8:a356376db984 140 // going to sleep is triggerd by low pulse:
mazgch 8:a356376db984 141 // LISA-U200 1000ms
mazgch 8:a356376db984 142 // SARA-G350 n/a
mazgch 8:a356376db984 143 // LISA-C200 n/a
mazgch 8:a356376db984 144 wait_ms(1000);
mazgch 8:a356376db984 145 mdmPwrOn = 1;
mazgch 8:a356376db984 146 }
mazgch 7:e3eab86f1de9 147 }
mazgch 7:e3eab86f1de9 148
mazgch 7:e3eab86f1de9 149 void C027::gpsPower(bool enable)
mazgch 7:e3eab86f1de9 150 {
mazgch 7:e3eab86f1de9 151 if (!gpsIsEnabled && enable) // enable gps
mazgch 7:e3eab86f1de9 152 {
mazgch 16:3ce62caf4518 153 // switch on power supply
mazgch 7:e3eab86f1de9 154 gpsEn = 1; // LDOEN: 0=off -> 1=on
mazgch 7:e3eab86f1de9 155 wait_ms(1); // wait until stable
mazgch 16:3ce62caf4518 156 // make sure we are not in reset
mazgch 7:e3eab86f1de9 157 gpsRst = 1; // RESET: 0=reset -> 1=operating
mazgch 7:e3eab86f1de9 158 gpsIsEnabled = true;
mazgch 7:e3eab86f1de9 159 // the gps schould be fully ready after 50ms
mazgch 13:fb30e9923a7b 160 if (mdmIsEnabled)
mazgch 13:fb30e9923a7b 161 mdmILvlOe = 1; // ILVLEN: 0=enabled (i2c)
mazgch 7:e3eab86f1de9 162 }
mazgch 7:e3eab86f1de9 163 else if (gpsIsEnabled && !enable) // diasble gps
mazgch 7:e3eab86f1de9 164 {
mazgch 7:e3eab86f1de9 165 gpsIsEnabled = false;
mazgch 13:fb30e9923a7b 166 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 7:e3eab86f1de9 167 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 168 // the gps ldo may have to remain enabled for the level shifters of the modem
mazgch 16:3ce62caf4518 169 if (!mdmIsEnabled)
mazgch 16:3ce62caf4518 170 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 171 #else
mazgch 13:fb30e9923a7b 172 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 173 #endif
mazgch 7:e3eab86f1de9 174 }
mazgch 6:e11bf54dd344 175 }
mazgch 6:e11bf54dd344 176
mazgch 6:e11bf54dd344 177 void C027::gpsReset(void)
mazgch 6:e11bf54dd344 178 {
mazgch 6:e11bf54dd344 179 if (gpsIsEnabled)
mazgch 6:e11bf54dd344 180 {
mazgch 6:e11bf54dd344 181 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 182 wait_ms(1);
mazgch 6:e11bf54dd344 183 gpsRst = 1; // RESET: 1=operating,0=reset
mazgch 6:e11bf54dd344 184 }
mazgch 6:e11bf54dd344 185 }