Hi Jardon,
I am writing IR receiver driver over GPIO line.
Trying to read the frame sent by Samsung remote.
I am sending interrupt events to rc frame work using
ir_raw_event_store_edge()
I am able to see that above API is pushing previous pulse/space packet
to rc framework when an interrupt is reported to it.
I am facing one issue with NEC decoder.
NECx protocol format has one start bit, 32 data bits and one stop bit
stop bit: pulse (562us) & space ( untill next key press event)
so i think here we should skip the STATE_TRAILER_SPACE event because the
width of it is not fixed for some of NECx protocols like samsung remote.
case STATE_TRAILER_PULSE:
if (!ev.pulse)
break;
if (!eq_margin(ev.duration, NEC_TRAILER_PULSE, NEC_UNIT
break;
data->state = STATE_TRAILER_SPACE;
IR_dprintk(1, "NEC (Ext) state set %d\n", data->state);
return 0;
case STATE_TRAILER_SPACE:
if (ev.pulse)
break;
if (!geq_margin(ev.duration, NEC_TRAILER_SPACE,
NEC_UNIT / 2))
break;
address = bitrev8((data->bits >> 24) & 0xff);
not_address = bitrev8((data->bits >> 16) & 0xff);
command = bitrev8((data->bits >> 8) & 0xff);
not_command = bitrev8((data->bits >> 0) & 0xff);
if ((command ^ not_command) != 0xff) {
IR_dprintk(1, "NEC checksum error: received
0x%08x\n",
data->bits);
send_32bits = true;
}
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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