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cem-dt-885x: Support for powering off the device

This commit is contained in:
Bert Vermeulen 2013-06-17 15:46:14 +02:00
parent 32de50b7f3
commit 4c22355f04
3 changed files with 45 additions and 2 deletions
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12
hardware/cem-dt-885x/api.c
View File

@ -32,12 +32,13 @@ static const int32_t hwcaps[] = {
SR_CONF_SOUNDLEVELMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_CONTINUOUS,
SR_CONF_DATALOG,
SR_CONF_SPL_WEIGHT_FREQ,
SR_CONF_SPL_WEIGHT_TIME,
SR_CONF_SPL_MEASUREMENT_RANGE,
SR_CONF_DATALOG,
SR_CONF_HOLD_MAX,
SR_CONF_HOLD_MIN,
SR_CONF_SPL_MEASUREMENT_RANGE,
SR_CONF_POWER_OFF,
};
static const char *weight_freq[] = {
@ -232,6 +233,9 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
*data = g_variant_new_tuple(range, 2);
}
break;
case SR_CONF_POWER_OFF:
*data = g_variant_new_boolean(FALSE);
break;
default:
return SR_ERR_NA;
}
@ -305,6 +309,10 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
}
}
break;
case SR_CONF_POWER_OFF:
if (g_variant_get_boolean(data))
ret = cem_dt_885x_power_off(sdi);
break;
default:
ret = SR_ERR_NA;
}

33
hardware/cem-dt-885x/protocol.c
View File

@ -685,3 +685,36 @@ SR_PRIV int cem_dt_885x_meas_range_set(const struct sr_dev_inst *sdi,
return ret;
}
SR_PRIV int cem_dt_885x_power_off(const struct sr_dev_inst *sdi)
{
struct sr_serial_dev_inst *serial;
char c, cmd;
serial = sdi->conn;
/* Reopen the port in non-blocking mode, so we can properly
* detect when the device stops communicating. */
serial_close(serial);
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return SR_ERR;
cmd = CMD_TOGGLE_POWER_OFF;
while (TRUE) {
serial_flush(serial);
if (serial_write(serial, (const void *)&cmd, 1) != 1)
return SR_ERR;
/* It never takes more than 23ms for the next token to arrive. */
g_usleep(25 * 1000);
if (serial_read(serial, &c, 1) != 1)
/* Device is no longer responding. Good! */
break;
}
/* In case the user manually turns on the device again, reset
* the port back to blocking. */
serial_close(serial);
serial_open(serial, SERIAL_RDWR);
return SR_OK;
}

2
hardware/cem-dt-885x/protocol.h
View File

@ -72,6 +72,7 @@ enum {
CMD_TOGGLE_WEIGHT_TIME = 0x77,
CMD_TOGGLE_HOLD_MAX_MIN = 0x11,
CMD_TOGGLE_MEAS_RANGE = 0x88,
CMD_TOGGLE_POWER_OFF = 0x33,
};
/** Private, per-device-instance driver context. */
@ -121,5 +122,6 @@ SR_PRIV int cem_dt_885x_meas_range_get(const struct sr_dev_inst *sdi,
uint64_t *low, uint64_t *high);
SR_PRIV int cem_dt_885x_meas_range_set(const struct sr_dev_inst *sdi,
uint64_t low, uint64_t high);
SR_PRIV int cem_dt_885x_power_off(const struct sr_dev_inst *sdi);
#endif