Stephen Dickey / C027-REVB

Fork to support REVB hardware.

Dependents:   C027_BootTest_revb C027_EthernetSniffTest C027_M3_SerialEcho C027_HelloWorld_revb ... more

Fork of C027 by u-blox

C027.cpp@15:971186932592, 2013-12-12 (annotated)

Committer:
dixter1
Date:
Thu Dec 12 19:15:22 2013 +0000
Revision:
15:971186932592
Parent:
14:e30f90b5447e
Child:
16:6475e8463afc
Boot Test for REVB C027 Hardware.

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 13:fb30e9923a7b 29 mdmEn(MDMEN), mdmRst(MDMRST), mdmPwrOn(MDMPWRON), // MDM CTRL
mazgch 13:fb30e9923a7b 30 mdmLvlOe(MDMLVLOE), mdmILvlOe(MDMILVLOE), mdmUsbDet(MDMUSBDET), // MDM IF
mazgch 13:fb30e9923a7b 31 gpsEn(GPSEN), gpsRst(GPSRST) // GPS CTRL
mazgch 6:e11bf54dd344 32 {
mazgch 14:e30f90b5447e 33 DigitalOut led(LED);
mazgch 13:fb30e9923a7b 34 DigitalOut mdmRts(MDMRTS);
mazgch 14:e30f90b5447e 35 led = 0; // LED1: 0=off
mazgch 14:e30f90b5447e 36 mdmRts = 0; // RTS: 0=ready to send
mazgch 7:e3eab86f1de9 37 // we start with the gps disabled
mazgch 8:a356376db984 38 gpsEn = 0; // LDOEN: 1=on,0=off
mazgch 8:a356376db984 39 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 40 gpsIsEnabled = false;
mazgch 7:e3eab86f1de9 41 // we start with the modem disabled
dixter1 15:971186932592 42 mdmLvlOe = 0; // LVLEN: 1=disabled (uart/gpio)
mazgch 13:fb30e9923a7b 43 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
dixter1 15:971186932592 44 mdmUsbDet = 1; // USBDET: 0=disabled
mazgch 8:a356376db984 45 mdmPwrOn = 1; // PWRON: 1=idle, 0=action
mazgch 8:a356376db984 46 mdmEn = 0; // LDOEN: 1=on, 0=off
dixter1 15:971186932592 47 mdmRst = 1; // RESET: 0=reset, 1=operating
mazgch 6:e11bf54dd344 48 mdmIsEnabled = false;
mazgch 14:e30f90b5447e 49 mdmUseUsb = false;
mazgch 6:e11bf54dd344 50 }
mazgch 6:e11bf54dd344 51
mazgch 6:e11bf54dd344 52 void C027::mdmPower(bool enable)
mazgch 6:e11bf54dd344 53 {
mazgch 7:e3eab86f1de9 54 if (!mdmIsEnabled && enable) // enable modem
mazgch 6:e11bf54dd344 55 {
mazgch 8:a356376db984 56 mdmEn = 1; // LDOEN: 0=off -> 1=on
dixter1 15:971186932592 57 wait_ms(50); // RST line will come up as soon as
dixter1 15:971186932592 58 mdmPwrOn = 0; // PWRON: 0=turn on -> 1=idle
mazgch 8:a356376db984 59 wait_ms(300); // power on sequence is triggered by keeping reset 50ms-300ms low
mazgch 14:e30f90b5447e 60 mdmPwrOn = 1; // PWRON: 0=turn on -> 1=idle
mazgch 7:e3eab86f1de9 61 mdmIsEnabled = true;
mazgch 7:e3eab86f1de9 62 }
mazgch 7:e3eab86f1de9 63 else if (mdmIsEnabled && !enable) // disable modem
mazgch 7:e3eab86f1de9 64 {
mazgch 7:e3eab86f1de9 65 mdmIsEnabled = false;
mazgch 7:e3eab86f1de9 66 // initiate power off sequence by setting PwnOn low for >1s
mazgch 13:fb30e9923a7b 67 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 13:fb30e9923a7b 68 mdmLvlOe = 1; // LVLEN: 1=disabled (uart/gpio)
mazgch 8:a356376db984 69 mdmUsbDet = 0; // USBDET: 0=disabled
mazgch 8:a356376db984 70 mdmPwrOn = 0; // PWRON: 0=active
mazgch 8:a356376db984 71 wait_ms(1000); // send to sleep
mazgch 8:a356376db984 72 mdmPwrOn = 1; // PWRON: 0=active -> 1=idle
mazgch 7:e3eab86f1de9 73 // now we can savely switch off the ldo
mazgch 8:a356376db984 74 mdmRst = 0; // RESET: 1=operating -> 0=reset
mazgch 8:a356376db984 75 mdmEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 76 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 77 // the gps ldo may no longer be needed level shifters of the modem
mazgch 7:e3eab86f1de9 78 // so we switch it off if the gps is not enabled
mazgch 7:e3eab86f1de9 79 if (!gpsIsEnabled)
mazgch 7:e3eab86f1de9 80 gpsEn = 0; // LDOEN(gps): 1=on -> 0=off
mazgch 7:e3eab86f1de9 81 #endif
mazgch 6:e11bf54dd344 82 }
mazgch 13:fb30e9923a7b 83
mazgch 6:e11bf54dd344 84 }
mazgch 6:e11bf54dd344 85
mazgch 14:e30f90b5447e 86 void C027::mdmUsbEnable(bool enable)
mazgch 14:e30f90b5447e 87 {
mazgch 14:e30f90b5447e 88 mdmUseUsb = enable;
mazgch 14:e30f90b5447e 89 if (mdmIsEnabled)
mazgch 14:e30f90b5447e 90 mdmUsbDet = mdmUseUsb ? 1 : 0;
mazgch 14:e30f90b5447e 91 }
mazgch 14:e30f90b5447e 92
mazgch 6:e11bf54dd344 93 void C027::mdmReset(void)
mazgch 6:e11bf54dd344 94 {
mazgch 8:a356376db984 95 if (mdmIsEnabled)
mazgch 8:a356376db984 96 {
mazgch 8:a356376db984 97 mdmRst = 0; // RESET: 0=reset
mazgch 8:a356376db984 98 // power on sequence is triggered by reset low
mazgch 8:a356376db984 99 // LISA-U200 50ms
mazgch 8:a356376db984 100 // SARA-G350 50ms
mazgch 8:a356376db984 101 // LISA-C200 300ms
mazgch 8:a356376db984 102 wait_ms(300);
mazgch 8:a356376db984 103 mdmRst = 1; // RESET: 0=reset -> 1=operating
mazgch 8:a356376db984 104 }
mazgch 8:a356376db984 105 }
mazgch 8:a356376db984 106
mazgch 8:a356376db984 107 void C027::mdmWakeup(void)
mazgch 8:a356376db984 108 {
mazgch 6:e11bf54dd344 109 if (mdmIsEnabled)
mazgch 6:e11bf54dd344 110 {
mazgch 8:a356376db984 111 mdmPwrOn = 0;
mazgch 8:a356376db984 112 // wakeup the device by low pulse:
mazgch 8:a356376db984 113 // LISA-U200 50-80us
mazgch 8:a356376db984 114 // SARA-G350 5ms
mazgch 8:a356376db984 115 // LISA-C200 150ms
mazgch 8:a356376db984 116 wait_ms(150);
mazgch 8:a356376db984 117 mdmPwrOn = 1;
mazgch 6:e11bf54dd344 118 }
mazgch 8:a356376db984 119 }
mazgch 8:a356376db984 120
dixter1 15:971186932592 121 // delete this function?
dixter1 15:971186932592 122 // pwr_on signal has no function once modem is powered on.
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 13:fb30e9923a7b 147 if (mdmIsEnabled)
mazgch 13:fb30e9923a7b 148 mdmILvlOe = 1; // ILVLEN: 0=enabled (i2c)
mazgch 7:e3eab86f1de9 149 }
mazgch 7:e3eab86f1de9 150 else if (gpsIsEnabled && !enable) // diasble gps
mazgch 7:e3eab86f1de9 151 {
mazgch 7:e3eab86f1de9 152 gpsIsEnabled = false;
mazgch 13:fb30e9923a7b 153 mdmILvlOe = 0; // ILVLEN: 0=disabled (i2c)
mazgch 13:fb30e9923a7b 154 gpsRst = 0; // RESET: 1=operating -> 0=reset
mazgch 7:e3eab86f1de9 155 #ifdef C027_REVA
mazgch 7:e3eab86f1de9 156 // the gps ldo may have to remain enabled for the level shifters of the modem
mazgch 7:e3eab86f1de9 157 if (!mdmIsEnabled)
mazgch 13:fb30e9923a7b 158 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 159 #else
mazgch 13:fb30e9923a7b 160 gpsEn = 0; // LDOEN: 1=on -> 0=off
mazgch 7:e3eab86f1de9 161 #endif
mazgch 7:e3eab86f1de9 162 }
mazgch 6:e11bf54dd344 163 }
mazgch 6:e11bf54dd344 164
mazgch 6:e11bf54dd344 165 void C027::gpsReset(void)
mazgch 6:e11bf54dd344 166 {
mazgch 6:e11bf54dd344 167 if (gpsIsEnabled)
mazgch 6:e11bf54dd344 168 {
mazgch 6:e11bf54dd344 169 gpsRst = 0; // RESET: 0=reset,1=operating
mazgch 6:e11bf54dd344 170 wait_ms(1);
mazgch 6:e11bf54dd344 171 gpsRst = 1; // RESET: 1=operating,0=reset
mazgch 6:e11bf54dd344 172 }
mazgch 6:e11bf54dd344 173 }