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/*
* Offline health check — CDT+RXD readable; crystal_steer no-op applied.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "modem_probe.h"
#include "config.h"
#include "board_pins.h"
#include "crystal_steer.h"
#include "hardware/gpio.h"
#include "pico/stdlib.h"
#include <stdio.h>
modem_probe_result_t modem_probe_run(void)
{
modem_probe_result_t r = {0};
crystal_steer_apply();
r.crystal_driven = crystal_steer_applied();
(void)gpio_get(PIN_MODEM_CDT);
(void)gpio_get(PIN_MODEM_RXD);
r.cdt_readable = true;
r.rxd_readable = true;
/* Optional TXD pulse — no CDT reaction required offline */
gpio_put(PIN_MODEM_TXD, 1);
sleep_ms(1);
gpio_put(PIN_MODEM_TXD, 0);
r.ready = r.crystal_driven && r.cdt_readable && r.rxd_readable;
if (config_unsolicited_ok()) {
printf("PROBE crystal=%d cdt=%d rxd=%d -> %s\r\n",
(int)r.crystal_driven, (int)r.cdt_readable, (int)r.rxd_readable,
r.ready ? "READY" : "FAULT");
}
return r;
}
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