static void press_power_button(int time_ms)
{
gpio_t gpio;
gpio_init_out_ex(&gpio, MDMPWRON, 1);
gpio_write(&gpio, 0);
wait_ms(time_ms);
gpio_write(&gpio, 1);
}
void onboard_modem_power_down()
{
gpio_t gpio;
gpio_init_out_ex(&gpio, MDMPWRON, 0);
/* keep the power line low for more than 10 seconds.
* If 3G_ON_OFF pin is kept low for more than a second, a controlled disconnect and shutdown takes
* place, Due to the network disconnect, shut-off can take up to 30 seconds. However, we wait for 10
* seconds only */
wait_ms(10 * 1000);
}
// called before main
void mbed_sdk_init()
{
gpio_t modemEn, modemRst, modemPwrOn, modemLvlOe, modemILvlOe, modemUsbDet;
gpio_t gpsEn, gpsRst, led, modemRts;
// start with modem disabled
gpio_init_out_ex(&modemEn, MDMEN, 0);
gpio_init_out_ex(&modemRst, MDMRST, 1);
gpio_init_out_ex(&modemPwrOn, MDMPWRON, 1);
gpio_init_out_ex(&modemLvlOe, MDMLVLOE, 1);
gpio_init_out_ex(&modemILvlOe, MDMILVLOE, 0);
gpio_init_out_ex(&modemUsbDet, MDMUSBDET, 0);
gpio_init_out_ex(&modemRts, MDMRTS, 0);
// start with gps disabled
gpio_init_out_ex(&gpsEn, GPSEN, 0);
gpio_init_out_ex(&gpsRst, GPSRST, 1);
// led should be off
gpio_init_out_ex(&led, LED, 0);
wait_ms(50); // when USB cable is inserted the interface chip issues
// multiple resets to the target CPU We wait here for a short period to
// prevent those resets from propagating to the modem and other
// components.
}
void ublox_board_init(void) {
gpio_t gpio;
// Enable power to 3V3
gpio_init_inout(&gpio, PWR3V3, PIN_OUTPUT, OpenDrain, 1);
// start with modem disabled
gpio_init_out_ex(&gpio, MDMRST, 0);
gpio_init_out_ex(&gpio, MDMPWRON, 0);
gpio_init_out_ex(&gpio, MDMRTS, 0);
gpio_init_in_ex(&gpio, MDMCURRENTSENSE, PullNone);
// start with GNSS disabled
gpio_init_inout(&gpio, GNSSEN, PIN_OUTPUT, PushPullNoPull, 0);
// power on SD card
gpio_init_out_ex(&gpio, SDPWRON, 1);
// led should be off
gpio_init_out_ex(&gpio, LED1, 1);
gpio_init_out_ex(&gpio, LED2, 1);
gpio_init_out_ex(&gpio, LED3, 1);
gpio_init_out_ex(&gpio, LED4, 1);
}
void gpio_init_out(gpio_t* gpio, PinName pin) {
gpio_init_out_ex(gpio, pin, 0);
}
