// hal mutex scope-locked version of halpr_find_pin_by_name()
hal_pin_t *
hal_find_pin_by_name(const char *name)
{
hal_pin_t *p __attribute__((cleanup(halpr_autorelease_mutex)));
rtapi_mutex_get(&(hal_data->mutex));
p = halpr_find_pin_by_name(name);
return p;
}
int set_channel_source(int chan_num, int type, char *name)
{
scope_vert_t *vert;
scope_chan_t *chan;
hal_pin_t *pin;
hal_sig_t *sig;
hal_param_t *param;
vert = &(ctrl_usr->vert);
chan = &(ctrl_usr->chan[chan_num - 1]);
/* locate the selected item in the HAL */
if (type == 0) {
/* search the pin list */
pin = halpr_find_pin_by_name(name);
if (pin == NULL) {
/* pin not found */
return -1;
}
chan->data_source_type = 0;
chan->data_source = SHMOFF(pin);
chan->data_type = pin->type;
chan->name = pin->name;
} else if (type == 1) {
/* search the signal list */
sig = halpr_find_sig_by_name(name);
if (sig == NULL) {
/* signal not found */
return -1;
}
chan->data_source_type = 1;
chan->data_source = SHMOFF(sig);
chan->data_type = sig->type;
chan->name = sig->name;
} else if (type == 2) {
/* search the parameter list */
param = halpr_find_param_by_name(name);
if (param == NULL) {
/* parameter not found */
return -1;
}
chan->data_source_type = 2;
chan->data_source = SHMOFF(param);
chan->data_type = param->type;
chan->name = param->name;
}
switch (chan->data_type) {
case HAL_BIT:
chan->data_len = sizeof(hal_bit_t);
chan->min_index = -2;
chan->max_index = 2;
break;
case HAL_FLOAT:
chan->data_len = sizeof(hal_float_t);
chan->min_index = -36;
chan->max_index = 36;
break;
case HAL_S32:
chan->data_len = sizeof(hal_s32_t);
chan->min_index = -2;
chan->max_index = 30;
break;
case HAL_U32:
chan->data_len = sizeof(hal_u32_t);
chan->min_index = -2;
chan->max_index = 30;
break;
default:
/* Shouldn't get here, but just in case... */
chan->data_len = 0;
chan->min_index = -1;
chan->max_index = 1;
}
/* invalidate any data in the buffer for this channel */
vert->data_offset[chan_num - 1] = -1;
/* set scale and offset to nominal values */
chan->vert_offset = 0.0;
chan->scale_index = 0;
/* return success */
return 0;
}
