Hi everyone!
When trying to use dvbv5-scan in scr/unicable mode with
-U 1210000 I get an L-Band frequency of 161424.00 MHz which is
wrong, therefore the resulting DiSEqC command that is being sent to
the LNB is also wrong.
This patch tries to change dvbv5-scan to to send a correct DiSEqC
command. I captured the DiSEqC command from a working tv and replicated
it successfully.
Unfortunately even though I get a measurable result (the LNB seems to
tune the right transponder to the right userband) dvbv5-scan does not
manage to get a lock.
I think something about the userband offset calculation might be wrong
but I have been unable to pinpoint the issue for several days now. Any
help would be greatly appreciated.
diff --git a/lib/libdvbv5/dvb-sat.c b/lib/libdvbv5/dvb-sat.c
index 71ded425..a39575e8 100644
--- a/lib/libdvbv5/dvb-sat.c
+++ b/lib/libdvbv5/dvb-sat.c
@@ -502,9 +502,12 @@ static int dvbsat_scr_odu_channel_change(struct dvb_v5_fe_parms_priv *parms,
cmd->data0 |= (sat_number & 0x7) << 5;
pos_b = (sat_number & 0x8) ? 1 : 0;
+
+
+ dvb_log("DiSEqC command highband= %d", high_band);
/* Fill the LNB number */
- cmd->data0 |= high_band ? 0 : 4;
- cmd->data0 |= pol_v ? 8 : 0;
+ cmd->data0 |= high_band ? 4 : 0;
+ cmd->data0 |= pol_v ? 0 : 8;
cmd->data0 |= pos_b ? 16 : 0;
return dvb_fe_diseqc_cmd(&parms->p, cmd->len, cmd->msg);
@@ -662,11 +665,11 @@ static int dvb_sat_get_freq(struct dvb_v5_fe_parms *p, uint16_t *t)
}
} else {
if (parms->p.verbose > 1)
- dvb_log("Seeking for LO for %.2f MHz frequency", freq / 1000000.);
+ dvb_log("Seeking for LO for %.2f GHz frequency", freq / 1000000.);
/* Multi-LO (dual-band) LNBf using DiSEqC */
for (j = 0; j < ARRAY_SIZE(lnb->freqrange) && lnb->freqrange[j].low; j++) {
if (parms->p.verbose > 1)
- dvb_log("LO setting %i: %.2f MHz to %.2f MHz", j,
+ dvb_log("LO setting %i: %.2f GHz to %.2f GHz", j,
lnb->freqrange[j].low / 1000., lnb->freqrange[j].high / 1000.);
if (freq < lnb->freqrange[j].low * 1000 || freq > lnb->freqrange[j].high * 1000)
@@ -682,10 +685,19 @@ static int dvb_sat_get_freq(struct dvb_v5_fe_parms *p, uint16_t *t)
if (parms->p.freq_bpf) {
/* For SCR/Unicable setups */
- *t = (((freq / 1000) + parms->p.freq_bpf + 2) / 4) - 350;
- parms->freq_offset += ((*t + 350) * 4) * 1000;
- if (parms->p.verbose)
- dvb_log("BPF: %d KHz", parms->p.freq_bpf);
+ int base_freq = abs(freq / 1000 - lnb->freqrange[j].int_freq) + parms->p.freq_bpf /1000;
+ *t = base_freq / 4 - 350;
+ int rounded_freq = 4 * (*t + 350);
+ int rounding_offset = rounded_freq - base_freq;
+
+ parms->freq_offset = freq - (parms->p.freq_bpf / 1000 + rounding_offset )* 1000;
+
+ if (parms->p.verbose) {
+ dvb_log("Tuning Word: %04X",*t);
+ dvb_log("base_freq: %d", base_freq);
+ dvb_log("rounded_freq: %d", rounded_freq);
+ dvb_log("freq_offset: %d MHz, BPF: %d MHz, rounding_offset: %d MHz", parms->freq_offset, parms->p.freq_bpf, rounding_offset);
+ }
} else {
parms->freq_offset = lnb->freqrange[j].int_freq * 1000;
if (parms->p.verbose > 1)
