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Hamlib/rotators/ars/ars.c

791 wiersze
21 KiB
C
Czysty Wina Historia

/*
* Hamlib Rotator backend - ARS parallel port backend
* Copyright (c) 2010 by Stephane Fillod
* This code is inspired by work from Pablo GARCIA - EA4TX
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h> /* String function definitions */
#include <unistd.h> /* UNIX standard function definitions */
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_PTHREAD
#include <pthread.h>
#endif
#include "hamlib/rotator.h"
#include "parallel.h"
#include "misc.h"
#include "register.h"
#include "ars.h"
#define CTL_PIN_CS PARPORT_CONTROL_AUTOFD /* pin14: Control Linefeed */
#define CTL_PIN_CLK PARPORT_CONTROL_STROBE /* pin01: Control /Strobe */
#define STA_PIN_D0 PARPORT_STATUS_BUSY /* pin11: Status Busy */
#define STA_PIN_D1 PARPORT_STATUS_ERROR /* pin15: Status /Error */
#define DTA_PIN02 0x01 /* Data0 */
#define DTA_PIN03 0x02 /* Data1 */
#define DTA_PIN04 0x04 /* Data2 */
#define DTA_PIN05 0x08 /* Data3 */
#define DTA_PIN06 0x10 /* Data4 */
#define DTA_PIN07 0x20 /* Data5 */
#define DTA_PIN08 0x40 /* Data6 */
#define DTA_PIN09 0x80 /* Data7 */
#define CTL_PIN16 PARPORT_CONTROL_INIT
#define CTL_PIN17 PARPORT_CONTROL_SELECT
#define ARS_BRAKE_DELAY (100*1000) /* usecs */
#define ARS_SETTLE_DELAY (500*1000) /* usecs */
#define PP_IO_PERIOD (25) /* usecs */
#define NUM_SAMPLES 3
/* TODO: take into account ADC res (8 bits -> 1.4 deg at 360 deg)
* Rem: at 360 deg/mn, that's 6 deg/sec.
*/
#define AZ_RANGE 3.
#define EL_RANGE 2.
/* Check return value, with appropriate unlocking upon error.
* Assumes "rot" variable is current ROT pointer.
*/
#define CHKPPRET(a) \
do { int _retval = a; if (_retval != RIG_OK) \
{par_unlock (&rot->state.rotport);return _retval; }} while(0)
static int ars_init(ROT *rot);
static int ars_cleanup(ROT *rot);
static int ars_open(ROT *rot);
static int ars_close(ROT *rot);
static int ars_stop(ROT *rot);
static int ars_move(ROT *rot, int direction, int speed);
static int ars_set_position_sync(ROT *rot, azimuth_t az, elevation_t el);
static int ars_set_position(ROT *rot, azimuth_t az, elevation_t el);
static int ars_get_position(ROT *rot, azimuth_t *az, elevation_t *el);
#ifdef HAVE_PTHREAD
static void *handle_set_position(void *);
#endif
/* ************************************************************************* */
static int ars_clear_ctrl_pin(ROT *rot, unsigned char pin)
{
hamlib_port_t *pport = &rot->state.rotport;
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
priv->pp_control &= ~pin;
return par_write_control(pport, priv->pp_control);
}
static int ars_set_ctrl_pin(ROT *rot, unsigned char pin)
{
hamlib_port_t *pport = &rot->state.rotport;
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
priv->pp_control |= pin;
return par_write_control(pport, priv->pp_control);
}
static int ars_clear_data_pin(ROT *rot, unsigned char pin)
{
hamlib_port_t *pport = &rot->state.rotport;
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
priv->pp_data &= ~pin;
return par_write_data(pport, priv->pp_data);
}
static int ars_set_data_pin(ROT *rot, unsigned char pin)
{
hamlib_port_t *pport = &rot->state.rotport;
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
priv->pp_data |= pin;
return par_write_data(pport, priv->pp_data);
}
static int ars_has_el(const ROT *rot)
{
return (rot->caps->rot_type & ROT_FLAG_ELEVATION);
}
/* ************************************************************************* */
int
ars_init(ROT *rot)
{
struct ars_priv_data *priv;
if (!rot)
{
return -RIG_EINVAL;
}
rot->state.priv = (struct ars_priv_data *)malloc(sizeof(struct ars_priv_data));
if (!rot->state.priv)
{
/* whoops! memory shortage! */
return -RIG_ENOMEM;
}
priv = rot->state.priv;
priv->pp_control = 0;
priv->pp_data = 0;
/* Always use 10 bit resolution, which supports also 8 bits
* at the cost of 2 potentially wrong lsb */
priv->adc_res = 10; /* 8 bits vs. 10 bits ADC */
priv->brake_off = 0; /* i.e. brake is ON */
priv->curr_move = 0;
return RIG_OK;
}
int
ars_cleanup(ROT *rot)
{
if (!rot)
{
return -RIG_EINVAL;
}
if (rot->state.priv)
{
free(rot->state.priv);
rot->state.priv = NULL;
}
return RIG_OK;
}
int
ars_open(ROT *rot)
{
/* make it idle, and known state */
ars_stop(rot);
#ifdef HAVE_PTHREAD
{
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
pthread_attr_t attr;
int retcode;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
/* create behind-the-scene thread doing the ars_set_position_sync() */
retcode = pthread_create(&priv->thread, &attr, handle_set_position, rot);
if (retcode != RIG_OK)
{
rig_debug(RIG_DEBUG_ERR, "%s: pthread_create: %s\n", __func__,
strerror(retcode));
return -RIG_ENOMEM;
}
}
#endif
return RIG_OK;
}
int
ars_close(ROT *rot)
{
#ifdef HAVE_PTHREAD
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
pthread_cancel(priv->thread);
#endif
/* leave it in safe state */
ars_stop(rot);
return RIG_OK;
}
int
ars_stop(ROT *rot)
{
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
hamlib_port_t *pport = &rot->state.rotport;
rig_debug(RIG_DEBUG_TRACE, "%s called, brake was %s\n", __func__,
priv->brake_off ? "OFF" : "ON");
#ifdef HAVE_PTHREAD
priv->set_pos_active = 0;
#endif
par_lock(pport);
priv->brake_off = 0;
priv->curr_move = 0;
// Relay AUX -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN08));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17 | CTL_PIN16));
// Elevation Relays -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN07));
par_unlock(pport);
return RIG_OK;
}
int
ars_move(ROT *rot, int direction, int speed)
{
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
hamlib_port_t *pport = &rot->state.rotport;
int need_settle_delay = 0;
rig_debug(RIG_DEBUG_TRACE, "%s called%s%s%s%s%s\n", __func__,
(direction & ROT_MOVE_LEFT) ? " LEFT" : "",
(direction & ROT_MOVE_RIGHT) ? " RIGHT" : "",
(direction & ROT_MOVE_UP) ? " UP" : "",
(direction & ROT_MOVE_DOWN) ? " DOWN" : "",
(direction == 0) ? " STOP" : "");
par_lock(pport);
/* Allow the rotator to settle down when changing direction */
if (((priv->curr_move & ROT_MOVE_LEFT) && (direction & ROT_MOVE_RIGHT)) ||
((priv->curr_move & ROT_MOVE_RIGHT) && (direction & ROT_MOVE_LEFT)))
{
// Relay AUX -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN08));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17 | CTL_PIN16));
need_settle_delay = 1;
priv->brake_off = 0;
}
if (ars_has_el(rot) &&
(((priv->curr_move & ROT_MOVE_UP) && (direction & ROT_MOVE_DOWN)) ||
((priv->curr_move & ROT_MOVE_DOWN) && (direction & ROT_MOVE_UP))))
{
// Elevation Relays -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN07));
need_settle_delay = 1;
}
if (need_settle_delay)
{
rig_debug(RIG_DEBUG_TRACE, "%s need settling delay\n", __func__);
hl_usleep(ARS_SETTLE_DELAY);
}
priv->curr_move = direction;
/* Brake handling, only for AZ */
if (!priv->brake_off && (direction & (ROT_MOVE_LEFT | ROT_MOVE_RIGHT)))
{
/* release the brake */
if (ars_has_el(rot))
{
// RCI Model Azim & Elev
// Deactivated CCW/CW relays
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17 | CTL_PIN16));
// Relay Aux
CHKPPRET(ars_set_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN06 | DTA_PIN08));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN09));
}
else
{
// RCI Model Azimuth only
// Deactivated CCW/CW relays
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17 | CTL_PIN16));
// Relay Aux
CHKPPRET(ars_set_data_pin(rot,
DTA_PIN02 | DTA_PIN04 | DTA_PIN06 | DTA_PIN07 | DTA_PIN08 | DTA_PIN09));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN05));
}
priv->brake_off = 1;
hl_usleep(ARS_BRAKE_DELAY);
}
if (ars_has_el(rot))
{
if (direction & ROT_MOVE_UP)
{
/* UP */
CHKPPRET(ars_set_data_pin(rot, DTA_PIN03 | DTA_PIN06 | DTA_PIN07));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN05 | DTA_PIN09));
}
else if (direction & ROT_MOVE_DOWN)
{
CHKPPRET(ars_set_data_pin(rot, DTA_PIN03 | DTA_PIN05 | DTA_PIN06 | DTA_PIN07));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN09));
}
else
{
// Elevation Relays -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN07));
}
}
if (direction & ROT_MOVE_LEFT)
{
// Relay Left
if (ars_has_el(rot))
{
// RCI Model Azim & Elev
CHKPPRET(ars_set_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN06));
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN16));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN09));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17));
}
else
{
// RCI Model Azimuth only
CHKPPRET(ars_set_data_pin(rot,
DTA_PIN02 | DTA_PIN04 | DTA_PIN06 | DTA_PIN07 | DTA_PIN08));
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN16));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN05));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17));
}
}
else if (direction & ROT_MOVE_RIGHT)
{
// Relay Right
if (ars_has_el(rot))
{
// RCI Model Azim & Elev
CHKPPRET(ars_set_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN06));
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN17));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN09));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN16));
}
else
{
// RCI Model Azimuth only
CHKPPRET(ars_set_data_pin(rot,
DTA_PIN02 | DTA_PIN04 | DTA_PIN06 | DTA_PIN07 | DTA_PIN08));
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN17));
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN03 | DTA_PIN05));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN16));
}
}
else
{
// Relay AUX -> Off
CHKPPRET(ars_clear_data_pin(rot, DTA_PIN02 | DTA_PIN04 | DTA_PIN08));
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN17 | CTL_PIN16));
// AZ stop
}
par_unlock(pport);
return RIG_OK;
}
static int angle_in_range(float angle, float angle_base, float range)
{
return (angle >= angle_base - range && angle <= angle_base + range);
}
/*
* Thread handler
*/
#ifdef HAVE_PTHREAD
static void *handle_set_position(void *arg)
{
ROT *rot = (ROT *) arg;
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
int retcode;
while (1)
{
if (!priv->set_pos_active)
{
/* TODO: replace polling period by cond var */
hl_usleep(100 * 1000 - 1);
continue;
}
retcode = ars_set_position_sync(rot, priv->target_az, priv->target_el);
priv->set_pos_active = 0;
if (retcode != RIG_OK)
{
rig_debug(RIG_DEBUG_WARN, "%s: ars_set_position_sync() failed: %s\n",
__func__, rigerror(retcode));
hl_usleep(1000 * 1000);
continue;
}
}
return NULL;
}
#endif
/*
* ars_set_position_sync() is synchronous.
* See handle_set_position_async() for asynchronous thread handler,
* with wait loop in background
*/
int
ars_set_position_sync(ROT *rot, azimuth_t az, elevation_t el)
{
azimuth_t curr_az, prev_az;
elevation_t curr_el, prev_el;
int retval;
int az_move, el_move;
struct timeval last_pos_az_tv, last_pos_el_tv;
rig_debug(RIG_DEBUG_TRACE, "%s called: %.1f %.1f\n", __func__, az, el);
ars_stop(rot);
retval = ars_get_position(rot, &curr_az, &curr_el);
if (retval != RIG_OK)
{
return retval;
}
/* watchdog init */
prev_az = curr_az;
prev_el = curr_el;
gettimeofday(&last_pos_az_tv, NULL);
last_pos_el_tv = last_pos_az_tv;
while (!angle_in_range(curr_az, az, AZ_RANGE) ||
(ars_has_el(rot) && !angle_in_range(curr_el, el, EL_RANGE))
)
{
if (curr_az < (az - AZ_RANGE))
{
az_move = ROT_MOVE_RIGHT;
}
else if (curr_az > (az + AZ_RANGE))
{
az_move = ROT_MOVE_LEFT;
}
else
{
az_move = 0;
}
if (ars_has_el(rot))
{
if (curr_el < (el - EL_RANGE))
{
el_move = ROT_MOVE_UP;
}
else if (curr_el > (el + EL_RANGE))
{
el_move = ROT_MOVE_DOWN;
}
else
{
el_move = 0;
}
}
else
{
el_move = 0;
}
retval = ars_move(rot, az_move | el_move, 0);
if (retval != RIG_OK)
{
ars_stop(rot);
return retval;
}
/* wait a little */
hl_usleep(10 * 1000);
retval = ars_get_position(rot, &curr_az, &curr_el);
if (retval != RIG_OK)
{
ars_stop(rot);
return retval;
}
/* Watchdog detecting when rotor is blocked unexpectedly */
#define AZ_WATCHDOG 5000 /* ms */
#define EL_WATCHDOG 5000 /* ms */
if (az_move != 0 && angle_in_range(curr_az, prev_az, AZ_RANGE))
{
if (rig_check_cache_timeout(&last_pos_az_tv, AZ_WATCHDOG))
{
ars_stop(rot);
return -RIG_ETIMEOUT;
}
}
else
{
prev_az = curr_az;
gettimeofday(&last_pos_az_tv, NULL);
}
if (el_move != 0 && ars_has_el(rot) &&
angle_in_range(curr_el, prev_el, EL_RANGE))
{
if (rig_check_cache_timeout(&last_pos_el_tv, EL_WATCHDOG))
{
ars_stop(rot);
return -RIG_ETIMEOUT;
}
}
else
{
prev_el = curr_el;
gettimeofday(&last_pos_el_tv, NULL);
}
}
return ars_stop(rot);
}
int
ars_set_position(ROT *rot, azimuth_t az, elevation_t el)
{
#ifdef HAVE_PTHREAD
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
/* will be picked by handle_set_position() next polling tick */
priv->target_az = az;
priv->target_el = el;
priv->set_pos_active = 1;
return RIG_OK;
#else
return ars_set_position_sync(rot, az, el);
#endif
}
static int comparunsigned(const void *a, const void *b)
{
const unsigned ua = *(const unsigned *)a, ub = *(const unsigned *)b;
return ua == ub ? 0 : ua < ub ? -1 : 1;
}
int
ars_get_position(ROT *rot, azimuth_t *az, elevation_t *el)
{
struct ars_priv_data *priv = (struct ars_priv_data *)rot->state.priv;
struct rot_state *rs = &rot->state;
hamlib_port_t *pport = &rs->rotport;
int i, num_sample;
unsigned az_samples[NUM_SAMPLES], az_value;
unsigned el_samples[NUM_SAMPLES], el_value;
unsigned char status;
par_lock(pport);
/* flush last sampled value, with a dummy read */
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CS));
hl_usleep(PP_IO_PERIOD);
for (i = 0; i < priv->adc_res; i++)
{
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
}
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN_CS));
/* end of dummy read */
for (num_sample = 0; num_sample < NUM_SAMPLES; num_sample++)
{
/* read ADC value TLC(1)549 (8/10 bits), by SPI bitbanging */
hl_usleep(PP_IO_PERIOD);
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CS));
hl_usleep(PP_IO_PERIOD);
az_samples[num_sample] = 0;
el_samples[num_sample] = 0;
for (i = 0; i < priv->adc_res; i++)
{
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
CHKPPRET(par_read_status(pport, &status));
az_samples[num_sample] <<= 1;
az_samples[num_sample] |= (status & STA_PIN_D0) ? 1 : 0;
el_samples[num_sample] <<= 1;
el_samples[num_sample] |= (status & STA_PIN_D1) ? 1 : 0;
CHKPPRET(ars_clear_ctrl_pin(rot, CTL_PIN_CLK));
hl_usleep(PP_IO_PERIOD);
}
CHKPPRET(ars_set_ctrl_pin(rot, CTL_PIN_CS));
rig_debug(RIG_DEBUG_TRACE, "%s: raw samples: az %u, el %u\n",
__func__, az_samples[num_sample], el_samples[num_sample]);
hl_usleep(PP_IO_PERIOD);
}
par_unlock(pport);
qsort(az_samples, NUM_SAMPLES, sizeof(unsigned), comparunsigned);
qsort(el_samples, NUM_SAMPLES, sizeof(unsigned), comparunsigned);
/* select median value in order to rule out glitches */
az_value = az_samples[NUM_SAMPLES / 2];
el_value = el_samples[NUM_SAMPLES / 2];
*az = rs->min_az + ((float)az_value * (rs->max_az - rs->min_az)) / ((
1 << priv->adc_res) - 1);
*el = rs->min_el + ((float)el_value * (rs->max_el - rs->min_el)) / ((
1 << priv->adc_res) - 1);
rig_debug(RIG_DEBUG_TRACE, "%s: az=%.1f el=%.1f\n", __func__, *az, *el);
return RIG_OK;
}
/* ************************************************************************* */
/*
* ARS rotator capabilities.
*/
/*
* RCI/RCI-SE, with Elevation daugtherboard/unit.
*/
const struct rot_caps rci_azel_rot_caps =
{
ROT_MODEL(ROT_MODEL_RCI_AZEL),
.model_name = "ARS RCI AZ&EL",
.mfg_name = "EA4TX",
.version = "20200112.0",
.copyright = "LGPL",
.status = RIG_STATUS_BETA,
.rot_type = ROT_TYPE_AZEL, /* AZ&EL units */
.port_type = RIG_PORT_PARALLEL,
.write_delay = 0,
.post_write_delay = 10,
.timeout = 0,
.retry = 3,
.min_az = 0,
.max_az = 360,
.min_el = 0,
.max_el = 180, /* TBC */
.rot_init = ars_init,
.rot_cleanup = ars_cleanup,
.rot_open = ars_open,
.rot_close = ars_close,
.set_position = ars_set_position,
.get_position = ars_get_position,
.stop = ars_stop,
.move = ars_move,
};
/*
* RCI/RCI-SE, without Elevation daugtherboard/unit.
* Azimuth only
*/
const struct rot_caps rci_az_rot_caps =
{
ROT_MODEL(ROT_MODEL_RCI_AZ),
.model_name = "ARS RCI AZ",
.mfg_name = "EA4TX",
.version = "20200112.0",
.copyright = "LGPL",
.status = RIG_STATUS_BETA,
.rot_type = ROT_TYPE_AZIMUTH, /* AZ-only unit */
.port_type = RIG_PORT_PARALLEL,
.write_delay = 0,
.post_write_delay = 10,
.timeout = 0,
.retry = 3,
.min_az = 0,
.max_az = 360,
.min_el = 0,
.max_el = 180, /* TBC */
.rot_init = ars_init,
.rot_cleanup = ars_cleanup,
.rot_open = ars_open,
.rot_close = ars_close,
.set_position = ars_set_position,
.get_position = ars_get_position,
.stop = ars_stop,
.move = ars_move,
};
/* ************************************************************************* */
DECLARE_INITROT_BACKEND(ars)
{
rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
rot_register(&rci_az_rot_caps);
rot_register(&rci_azel_rot_caps);
return RIG_OK;
}
/* ************************************************************************* */
/* end of file */
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