/* Find a suitable FPGA decimation factor and trigger delay,
* based on xmin & xmax zoom conntrols
*/
int transform_acq_params(rp_app_params_t *p)
{
TRACE("%s()\n", __FUNCTION__);
int ret = 0;
int i;
/* Skip the transform in case auto-set is in progress */
if ( (p[AUTO_FLAG_PARAM].value == 1) || (auto_in_progress == 1)) {
return ret;
}
double xmin = p[MIN_GUI_PARAM].value;
double xmax = p[MAX_GUI_PARAM].value;
float ratio;
int reset_zoom = 0;
int time_unit = p[TIME_UNIT_PARAM].value;
float t_unit_factor = pow(10, 3*(2 - time_unit));
/* When exactly this pair is provided by client, Reset Zoom is requested. */
if ((xmax == 1.0e6) && (xmin == -1.0e6)) {
reset_zoom = 1;
}
/* Server ForceX state */
p[FORCEX_FLAG_PARAM].value = (float) forcex_state;
/* Difference (expressed as ratio) between forced values and GUI state */
if ((xmax - xmin) != 0) {
ratio = fabs(forced_xmax - forced_xmin) / fabs(xmax - xmin);
} else {
ratio = 0.0;
}
/* Make it always between 0 and 1 (0: very different, 1 equal) */
if (ratio > 1) {
ratio = 1.0 / ratio;
}
/* Stop forcing if factor 33 of difference or less */
if (ratio > 0.03) {
p[FORCEX_FLAG_PARAM].value = 0;
forcex_state = 0;
}
/* Contver GUI values to seconds */
xmin /= t_unit_factor;
xmax /= t_unit_factor;
TRACE("TR: Xmin, Xmax: %10.8f, %10.8f\n", xmin, xmax);
int time_unit_gui = time_unit;
int dec;
double rdec;
/* Calculate the suitable FPGA decimation setting that optimally covers the GUI time frame */
if (p[TRIG_MODE_PARAM].value == 0) {
/* Autotriggering mode => acquisition starts at time t = 0 */
rdec = (xmax - 0) * c_osc_fpga_smpl_freq / OSC_FPGA_SIG_LEN;
} else {
double rxmax = (xmax < 0) ? 0 : xmax;
rdec = (rxmax - xmin) * c_osc_fpga_smpl_freq / OSC_FPGA_SIG_LEN;
}
/* Find optimal decimation setting */
for (i = 0; i < 6; i++) {
dec = osc_fpga_cnv_time_range_to_dec(i);
if (dec >= rdec) {
break;
}
}
if (i > 5)
i = 5;
/* Apply decimation parameter (time range), but not when forcing GUI client
* or during reset zoom.
*/
if ((forcex_state == 0) && (reset_zoom == 0)) {
p[TIME_RANGE_PARAM].value = i;
}
TRACE("TR: Dcimation: %6.2f -> %dx\n", rdec, dec);
/* New time_unit & factor */
time_unit = time_range_to_time_unit(p[TIME_RANGE_PARAM].value);
t_unit_factor = pow(10, 3*(2 - time_unit));
/* Update time unit Min and Max, but not if GUI hasn't responded to "forceX" command. */
if (forcex_state == 0) {
p[MIN_GUI_PARAM].value = xmin * t_unit_factor;
p[MAX_GUI_PARAM].value = xmax * t_unit_factor;
p[GUI_XMIN].value = p[MIN_GUI_PARAM].value;
p[GUI_XMAX].value = p[MAX_GUI_PARAM].value;
p[TIME_UNIT_PARAM].value = time_unit;
} else {
p[MIN_GUI_PARAM].value = forced_xmin;
p[MAX_GUI_PARAM].value = forced_xmax;
p[GUI_XMIN].value = p[MIN_GUI_PARAM].value;
p[GUI_XMAX].value = p[MAX_GUI_PARAM].value;
p[TIME_UNIT_PARAM].value = forced_units;
}
/* If time units have changed by server: client MUST configure x axis
* (ForceX is set for this purpose by server) to p[MIN_GUI_PARAM].value,
* expressed in new units.
*/
TRACE("TR: New xmin, xmax [unit]: %6.2f %6.2f [%d]\n",
p[MIN_GUI_PARAM].value,
p[MAX_GUI_PARAM].value,
(int)p[TIME_UNIT_PARAM].value);
int64_t t_delay;
/* Calculate necessary trigger delay expressed in FPGA decimated cycles */
if (p[TRIG_MODE_PARAM].value == 0) {
/* Autotriggering mode => acquisition starts at time t = 0 */
t_delay= OSC_FPGA_SIG_LEN ;
} else {
t_delay= OSC_FPGA_SIG_LEN + (xmin * c_osc_fpga_smpl_freq / dec);
}
/* Trigger delay limitations/saturation */
const int64_t c_max_t_delay = ((int64_t)1 << 32) - 1;
if (t_delay < 0)
t_delay = 0;
if (t_delay > c_max_t_delay)
t_delay = c_max_t_delay;
/* Trigger delay (reconverted in seconds) updated ONLY if client has responded to
* last forceX command.
*/
if (forcex_state == 0) {
p[TRIG_DLY_PARAM].value = ((t_delay - OSC_FPGA_SIG_LEN) * dec / c_osc_fpga_smpl_freq);
} else {
p[TRIG_DLY_PARAM].value = forced_delay;
}
/* Server issues a forceX command when time units change wrt. GUI (client) units */
if ((time_unit != time_unit_gui)) {
p[FORCEX_FLAG_PARAM].value = 1.0;
forcex_state = 1;
/* Other settings frozen until GUI recovers */
forced_xmin = p[MIN_GUI_PARAM].value;
forced_xmax = p[MAX_GUI_PARAM].value;
forced_units = p[TIME_UNIT_PARAM].value;
forced_delay = p[TRIG_DLY_PARAM].value;
}
/* When client issues a zoom reset, a particular ForceX command with
* the initial 0 - 130 us time range.
*/
if (reset_zoom == 1) {
p[FORCEX_FLAG_PARAM].value = 1.0;
forcex_state = 1;
forced_xmin = 0.0;
forced_xmax = 130.0;
forced_units = 0.0;
forced_delay = 0;
p[MIN_GUI_PARAM].value = forced_xmin;
p[MAX_GUI_PARAM].value = forced_xmax;
p[GUI_XMIN].value = p[MIN_GUI_PARAM].value;
p[GUI_XMAX].value = p[MAX_GUI_PARAM].value;
p[TIME_UNIT_PARAM].value = forced_units;
p[TRIG_DLY_PARAM].value = forced_delay;
p[TIME_RANGE_PARAM].value = 0;
}
TRACE("TR: Trigger delay: %.6f\n", p[TRIG_DLY_PARAM].value);
return ret;
}
/* Find a suitable FPGA decimation factor and trigger delay,
* based on xmin & xmax zoom conntrols */
int transform_acq_params(rp_app_params_t *p)
{
int ret = 0;
int i;
double xmin = p[MIN_GUI_PARAM].value;
double xmax = p[MAX_GUI_PARAM].value;
float ratio;
int reset_zoom=0;
int time_unit = p[TIME_UNIT_PARAM].value;
float t_unit_factor = pow(10, 3*(2 - time_unit));
// When exactly this pair provided by client Reset Zoom is requested
if ((xmax==1.0e6) && (xmin==-1.0e6))
reset_zoom=1;
TRACE("tu = %d, tf = %10.8f\n", time_unit, t_unit_factor);
// Retrieve Server ForceX state
p[FORCEX_FLAG_PARAM].value = (float) forcex_state;
// Difference (expressed as ratio) between forced values and GUI state
if ((xmax-xmin) !=0)
ratio=fabs(forced_xmax-forced_xmin)/fabs(xmax-xmin);
else
ratio=0;
if (ratio>1) // Make it always between 0 and 1 (0: very different, 1 equal)
ratio=1/ratio;
if (ratio > 0.03) // Stop forcing if factor 33 of difference or less
{
p[FORCEX_FLAG_PARAM].value = 0;
forcex_state=0;
}
// Contver GUI values to seconds
xmin /= t_unit_factor;
xmax /= t_unit_factor;
TRACE("Xmin, Xmax: %10.8f, %10.8f\n", xmin, xmax);
int time_unit_gui=time_unit;
int dec;
double rdec;
// Calculate the suitable FPGA decimation setting that optimally covers the GUI time frame
if (p[TRIG_MODE_PARAM].value==0) // Autotriggering mode => acquisition starts at time t=0
rdec= (xmax - 0) * c_osc_fpga_smpl_freq / OSC_FPGA_SIG_LEN;
else
rdec= (xmax - xmin) * c_osc_fpga_smpl_freq / OSC_FPGA_SIG_LEN;
for (i = 0; i < 6; i++) {
dec = osc_fpga_cnv_time_range_to_dec(i);
if (dec >= rdec) {
break;
}
}
if (i > 5)
i = 5;
// Optimal decimation setting identified
// Apply decimation parameter (time range), but not when forcing GUI client or during reset zoom.
if ((forcex_state==0) && (reset_zoom==0))
p[TIME_RANGE_PARAM].value = i;
TRACE("Dcimation: %6.2f -> %dx\n", rdec, dec);
TRACE("Time range: %d\n", i);
TRACE("Reset zoom: %d\n", reset_zoom);
/* New time_unit & factor */
time_unit = time_range_to_time_unit(p[TIME_RANGE_PARAM].value);
t_unit_factor = pow(10, 3*(2 - time_unit));
if (forcex_state==0) // Update time unit Min and Max, but not if GUI hasn't responded to "forceX" command.
{
p[MIN_GUI_PARAM].value = xmin * t_unit_factor;
p[MAX_GUI_PARAM].value = xmax * t_unit_factor;
p[TIME_UNIT_PARAM].value = time_unit;
}
else
{
p[MIN_GUI_PARAM].value = forced_xmin;
p[MAX_GUI_PARAM].value = forced_xmax;
p[TIME_UNIT_PARAM].value = forced_units;
}
// If time units changed by server: client MUST configure x axis (ForceX is set for this purpose by server)
// to p[MIN_GUI_PARAM].value, p[MIN_GUI_PARAM].value expressed in new units
TRACE("New xmin, xmax [unit]: %6.2f %6.2f [%d]\n",
p[MIN_GUI_PARAM].value,
p[MAX_GUI_PARAM].value,
(int)p[TIME_UNIT_PARAM].value);
int64_t t_delay;
// Calculating necessary trigger delay expressed in FPGA decimated cycles
if (p[TRIG_MODE_PARAM].value==0) // Autotriggering mode => acquisition starts at time t=0
t_delay= OSC_FPGA_SIG_LEN ;
else
t_delay= OSC_FPGA_SIG_LEN + (xmin * c_osc_fpga_smpl_freq / dec);
// Some limitations...
if (t_delay < 0)
t_delay = 0;
if (t_delay > ((int64_t)1 << 32) - 1)
t_delay = ((int64_t)1 << 32) - 1;
TRACE("Trigger delay: %d\n", (int)t_delay);
if (forcex_state==0) // Trigger delay (reconverted in seconds) updated ONLY if client has responded to last forceX command
p[TRIG_DLY_PARAM].value = ((t_delay - OSC_FPGA_SIG_LEN) * dec / c_osc_fpga_smpl_freq);
else
p[TRIG_DLY_PARAM].value =forced_delay;
// Server issues a forceX command when time units change wrt. GUI (client) units
if ((time_unit != time_unit_gui))
{
p[FORCEX_FLAG_PARAM].value = 1.0;
forcex_state=1;
forced_xmin=p[MIN_GUI_PARAM].value; // Other settings frozen until GUI recovers
forced_xmax=p[MAX_GUI_PARAM].value;
forced_units=p[TIME_UNIT_PARAM].value;
forced_delay=p[TRIG_DLY_PARAM].value;
}
if (reset_zoom==1) // When client issues a zoom reset, a particular ForceX command with the initial 0 - 130 us time range
{
p[FORCEX_FLAG_PARAM].value = 1.0;
forced_xmin=0.0;
forced_xmax=130.0;
forced_units=0.0;
forced_delay=0;
forcex_state=1;
p[MIN_GUI_PARAM].value = forced_xmin;
p[MAX_GUI_PARAM].value = forced_xmax;
p[TIME_UNIT_PARAM].value = forced_units;
p[TRIG_DLY_PARAM].value=forced_delay;
p[TIME_RANGE_PARAM].value = 0;
}
TRACE("Trigger delay: %10.6f\n", p[TRIG_DLY_PARAM].value);
return ret;
}
