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@12:31fb5ff9fef5, 2013-11-10 (annotated)

Committer:
mazgch
Date:
Sun Nov 10 18:46:43 2013 +0000
Revision:
12:31fb5ff9fef5
Parent:
11:722101675ce4
Child:
13:fb30e9923a7b
do not use A0 on rev a

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 2:b7bd3660ff64 9 void mbed_die(void)
mazgch 2:b7bd3660ff64 10 {
mazgch 8:a356376db984 11 DigitalOut led(LED);
mazgch 11:722101675ce4 12 led = 0;
mazgch 11:722101675ce4 13 // Send SOS in Morse Code: // "... --- ... "
mazgch 11:722101675ce4 14 const char sos[] = "=.=.=...===.===.===...=.=.=......";
mazgch 11:722101675ce4 15 const int dot = 100; // length of the dot in milliseconds (typical: 50-100 ms)
mazgch 11:722101675ce4 16 // lengths of symbols:
mazgch 11:722101675ce4 17 // di = dot
mazgch 11:722101675ce4 18 // dah = 3 dot
mazgch 11:722101675ce4 19 // char space = 3 dot
mazgch 11:722101675ce4 20 // word space = 6 dot
mazgch 11:722101675ce4 21 for (int i = 0; /* nothing */; i = sos[i+1] ? i+1 : 0)
mazgch 2:b7bd3660ff64 22 {
mazgch 11:722101675ce4 23 led = (sos[i] == '=');
mazgch 11:722101675ce4 24 wait_ms(dot);
mazgch 2:b7bd3660ff64 25 }
mazgch 2:b7bd3660ff64 26 }
mazgch 2:b7bd3660ff64 27
mazgch 6:e11bf54dd344 28 C027::C027() :
mazgch 10:bc9e2eb5daa8 29 mdmEn(MDMEN), mdmRst(MDMRST), mdmPwrOn(MDMPWRON), // MDM CTRL
mazgch 8:a356376db984 30 mdmRts(MDMRTS), mdmLvlOe(MDMLVLOE), mdmUsbDet(MDMUSBDET), // MDM IF
mazgch 8:a356376db984 31 gpsEn(GPSEN), gpsRst(GPSRST) // GPS CTRL
mazgch 6:e11bf54dd344 32 {
mazgch 7:e3eab86f1de9 33 // we start with the gps disabled
mazgch 8:a356376db984 34 gpsEn = 0; // LDOEN: 1=on,0=off
mazgch 8:a356376db984 35 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 36 gpsIsEnabled = false;
mazgch 7:e3eab86f1de9 37 // we start with the modem disabled
mazgch 8:a356376db984 38 mdmLvlOe = 1; // LVLEN: 1=disabled
mazgch 8:a356376db984 39 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 8:a356376db984 40 mdmPwrOn = 1; // PWRON: 1=idle, 0=action
mazgch 8:a356376db984 41 mdmRts = 0; // RTS. 0=ready to send
mazgch 8:a356376db984 42 mdmEn = 0; // LDOEN: 1=on, 0=off
mazgch 8:a356376db984 43 mdmRst = 0; // RESET: 0=reset, 1=operating
mazgch 6:e11bf54dd344 44 mdmIsEnabled = false;
mazgch 6:e11bf54dd344 45 }
mazgch 6:e11bf54dd344 46
mazgch 6:e11bf54dd344 47 void C027::mdmPower(bool enable)
mazgch 6:e11bf54dd344 48 {
mazgch 7:e3eab86f1de9 49 if (!mdmIsEnabled && enable) // enable modem
mazgch 6:e11bf54dd344 50 {
mazgch 7:e3eab86f1de9 51 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 52 // we need the gps ldo for the level shifters of the modem
mazgch 8:a356376db984 53 gpsEn = 1; // LDOEN(gps): 0=off -> 1=on
mazgch 7:e3eab86f1de9 54 #endif
mazgch 8:a356376db984 55 mdmPwrOn = 1; // PWRON: 1=idle
mazgch 8:a356376db984 56 mdmEn = 0; // LDOEN: 0=off
mazgch 8:a356376db984 57 mdmRst = 0; // RESET: 0=reset
mazgch 8:a356376db984 58 mdmLvlOe = 1; // LVLEN: 1=disabled
mazgch 8:a356376db984 59 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 8:a356376db984 60 wait_ms( 10); // wait until supply switched off
mazgch 8:a356376db984 61 mdmEn = 1; // LDOEN: 0=off -> 1=on
mazgch 8:a356376db984 62 wait_ms( 10); // wait until supply stable and on
mazgch 8:a356376db984 63 wait_ms(300); // power on sequence is triggered by keeping reset 50ms-300ms low
mazgch 8:a356376db984 64 mdmRst = 1; // RESET: 0=reset -> 1=operating
mazgch 8:a356376db984 65 mdmLvlOe = 0; // LVLEN: 0=enabled
mazgch 8:a356376db984 66 mdmUsbDet = 1; // USBDET: 1=enabled
mazgch 7:e3eab86f1de9 67 mdmIsEnabled = true;
mazgch 10:bc9e2eb5daa8 68 // the interfaces of the modem should be fully ready after a certain period
mazgch 10:bc9e2eb5daa8 69 // LISA-U200 5000ms
mazgch 10:bc9e2eb5daa8 70 // SARA-G350 3000ms
mazgch 10:bc9e2eb5daa8 71 // LISA-C200
mazgch 10:bc9e2eb5daa8 72 wait_ms(1000);
mazgch 7:e3eab86f1de9 73 }
mazgch 7:e3eab86f1de9 74 else if (mdmIsEnabled && !enable) // disable modem
mazgch 7:e3eab86f1de9 75 {
mazgch 7:e3eab86f1de9 76 mdmIsEnabled = false;
mazgch 7:e3eab86f1de9 77 // initiate power off sequence by setting PwnOn low for >1s
mazgch 8:a356376db984 78 mdmLvlOe = 1; // LVLEN: 1=disabled
mazgch 8:a356376db984 79 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 8:a356376db984 80 mdmPwrOn = 0; // PWRON: 0=active
mazgch 8:a356376db984 81 wait_ms(1000); // send to sleep
mazgch 8:a356376db984 82 mdmPwrOn = 1; // PWRON: 0=active -> 1=idle
mazgch 7:e3eab86f1de9 83 // now we can savely switch off the ldo
mazgch 8:a356376db984 84 mdmRst = 0; // RESET: 1=operating -> 0=reset
mazgch 8:a356376db984 85 mdmEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 86 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 87 // the gps ldo may no longer be needed level shifters of the modem
mazgch 7:e3eab86f1de9 88 // so we switch it off if the gps is not enabled
mazgch 7:e3eab86f1de9 89 if (!gpsIsEnabled)
mazgch 7:e3eab86f1de9 90 gpsEn = 0; // LDOEN(gps): 1=on -> 0=off
mazgch 7:e3eab86f1de9 91 #endif
mazgch 6:e11bf54dd344 92 }
mazgch 6:e11bf54dd344 93 }
mazgch 6:e11bf54dd344 94
mazgch 6:e11bf54dd344 95 void C027::mdmReset(void)
mazgch 6:e11bf54dd344 96 {
mazgch 8:a356376db984 97 if (mdmIsEnabled)
mazgch 8:a356376db984 98 {
mazgch 8:a356376db984 99 mdmRst = 0; // RESET: 0=reset
mazgch 8:a356376db984 100 // power on sequence is triggered by reset low
mazgch 8:a356376db984 101 // LISA-U200 50ms
mazgch 8:a356376db984 102 // SARA-G350 50ms
mazgch 8:a356376db984 103 // LISA-C200 300ms
mazgch 8:a356376db984 104 wait_ms(300);
mazgch 8:a356376db984 105 mdmRst = 1; // RESET: 0=reset -> 1=operating
mazgch 8:a356376db984 106 }
mazgch 8:a356376db984 107 }
mazgch 8:a356376db984 108
mazgch 8:a356376db984 109 void C027::mdmWakeup(void)
mazgch 8:a356376db984 110 {
mazgch 6:e11bf54dd344 111 if (mdmIsEnabled)
mazgch 6:e11bf54dd344 112 {
mazgch 8:a356376db984 113 mdmPwrOn = 0;
mazgch 8:a356376db984 114 // wakeup the device by low pulse:
mazgch 8:a356376db984 115 // LISA-U200 50-80us
mazgch 8:a356376db984 116 // SARA-G350 5ms
mazgch 8:a356376db984 117 // LISA-C200 150ms
mazgch 8:a356376db984 118 wait_ms(150);
mazgch 8:a356376db984 119 mdmPwrOn = 1;
mazgch 6:e11bf54dd344 120 }
mazgch 8:a356376db984 121 }
mazgch 8:a356376db984 122
mazgch 8:a356376db984 123 void C027::mdmSleep(void)
mazgch 8:a356376db984 124 {
mazgch 8:a356376db984 125 if (mdmIsEnabled)
mazgch 8:a356376db984 126 {
mazgch 8:a356376db984 127 mdmPwrOn = 0;
mazgch 8:a356376db984 128 // going to sleep is triggerd by low pulse:
mazgch 8:a356376db984 129 // LISA-U200 1000ms
mazgch 8:a356376db984 130 // SARA-G350 n/a
mazgch 8:a356376db984 131 // LISA-C200 n/a
mazgch 8:a356376db984 132 wait_ms(1000);
mazgch 8:a356376db984 133 mdmPwrOn = 1;
mazgch 8:a356376db984 134 }
mazgch 7:e3eab86f1de9 135 }
mazgch 7:e3eab86f1de9 136
mazgch 7:e3eab86f1de9 137 void C027::gpsPower(bool enable)
mazgch 7:e3eab86f1de9 138 {
mazgch 7:e3eab86f1de9 139 if (!gpsIsEnabled && enable) // enable gps
mazgch 7:e3eab86f1de9 140 {
mazgch 7:e3eab86f1de9 141 gpsRst = 0; // RESET: 0=reset
mazgch 7:e3eab86f1de9 142 gpsEn = 1; // LDOEN: 0=off -> 1=on
mazgch 7:e3eab86f1de9 143 wait_ms(1); // wait until stable
mazgch 7:e3eab86f1de9 144 gpsRst = 1; // RESET: 0=reset -> 1=operating
mazgch 7:e3eab86f1de9 145 gpsIsEnabled = true;
mazgch 7:e3eab86f1de9 146 // the gps schould be fully ready after 50ms
mazgch 7:e3eab86f1de9 147 }
mazgch 7:e3eab86f1de9 148 else if (gpsIsEnabled && !enable) // diasble gps
mazgch 7:e3eab86f1de9 149 {
mazgch 7:e3eab86f1de9 150 gpsIsEnabled = false;
mazgch 7:e3eab86f1de9 151 gpsRst = 0; // RESET: 1=operating -> 0=reset
mazgch 7:e3eab86f1de9 152 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 153 // the gps ldo may have to remain enabled for the level shifters of the modem
mazgch 7:e3eab86f1de9 154 if (!mdmIsEnabled)
mazgch 7:e3eab86f1de9 155 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 156 #else
mazgch 7:e3eab86f1de9 157 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 158 #endif
mazgch 7:e3eab86f1de9 159 }
mazgch 6:e11bf54dd344 160 }
mazgch 6:e11bf54dd344 161
mazgch 6:e11bf54dd344 162 void C027::gpsReset(void)
mazgch 6:e11bf54dd344 163 {
mazgch 6:e11bf54dd344 164 if (gpsIsEnabled)
mazgch 6:e11bf54dd344 165 {
mazgch 6:e11bf54dd344 166 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 167 wait_ms(1);
mazgch 6:e11bf54dd344 168 gpsRst = 1; // RESET: 1=operating,0=reset
mazgch 6:e11bf54dd344 169 }
mazgch 6:e11bf54dd344 170 }