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/* Test cases for tx_control.c Timing Advance Computation */
/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
* All Rights Reserved
*
* Author: Philipp Maier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/application.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/gsm_data.h>
#include <osmo-bts/ta_control.h>
#include <osmo-bts/bts_trx.h>
void lchan_ms_ta_ctrl_test(int16_t toa256_start, unsigned int steps)
{
struct gsm_bts_trx trx = { };
struct gsm_bts_trx_ts ts = { .trx = &trx };
struct gsm_lchan lchan = { .ts = &ts };
unsigned int i;
uint8_t rqd_ta_after;
uint8_t rqd_ta_before;
int16_t toa256 = toa256_start;
printf("toa256_start = %u / 256 = %u, steps = %u\n", toa256_start,
toa256_start / 256, steps);
for (i = 0; i < steps; i++) {
printf("Step #%u\n", i);
printf(" lchan.ta_ctrl.current (before) = %u\n", lchan.ta_ctrl.current);
printf(" toa256 (before) = %u / 256 = %u\n", toa256,
toa256 / 256);
rqd_ta_before = lchan.ta_ctrl.current;
lchan_ms_ta_ctrl(&lchan, rqd_ta_before, toa256);
rqd_ta_after = lchan.ta_ctrl.current;
toa256 -= (rqd_ta_after - rqd_ta_before) * 256;
printf(" lchan.ta_ctrl.current (after) = %u\n", lchan.ta_ctrl.current);
printf(" toa256 (after) = %u / 256 = %u\n", toa256,
toa256 / 256);
}
printf("Done.\n");
printf("\n");
}
int main(int argc, char **argv)
{
void *tall_bts_ctx;
tall_bts_ctx = talloc_named_const(NULL, 1, "OsmoBTS context");
osmo_init_logging2(tall_bts_ctx, &bts_log_info);
lchan_ms_ta_ctrl_test(16 * 256, 20);
lchan_ms_ta_ctrl_test(4000, 50);
lchan_ms_ta_ctrl_test(12345, 50);
}
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