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deliver thread no longer waits for AUDIO_PLL_LOCK_DELAY - this was causing pop issues on rate change as DAC has mclk but no bclk/lrclk. This seems to cause issues. This delay now added to audio SF change in EP0 for safety. Related to BUG #14769

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This commit is contained in:
Ross Owen
2014-01-20 18:13:54 +00:00
parent e53de21f7a
commit 8712acb539
2 changed files with 14 additions and 9 deletions
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7
module_usb_audio/audio.xc
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@@ -948,11 +948,16 @@ void audio(chanend c_mix_out, chanend ?c_dig_rx, chanend ?c_config, chanend ?c)
/* No delay for DFU modes */
if ((curSamFreq != AUDIO_REBOOT_FROM_DFU) && (curSamFreq != AUDIO_STOP_FOR_DFU) && retVal1)
{
#if 0
/* User should ensure MCLK is stable in AudioHwConfig */
if(retVal1 == SET_SAMPLE_FREQ)
{
timer t;
unsigned time;
t :> time;
t when timerafter(time+AUDIO_PLL_LOCK_DELAY) :> void;
}
#endif
/* Handshake back */
outct(c_mix_out, XS1_CT_END);
}

8
module_usb_audio/endpoint0/audiorequests.xc
View File

@@ -308,17 +308,17 @@ int AudioClassRequests_2(XUD_ep ep0_out, XUD_ep ep0_in, USB_SetupPacket_t &sp, c
outuint(c_audioControl, SET_SAMPLE_FREQ);
outuint(c_audioControl, g_curSamFreq);
/* Wait for handshake back - i.e. pll locked and clocks okay */
/* Wait for handshake back - i.e. PLL locked and clocks okay */
chkct(c_audioControl, XS1_CT_END);
}
/* Allow time for our feedback to stabalise*/
/* Allow time for our feedback to stabilise*/
{
timer t;
unsigned time;
t :> time;
t when timerafter(time+5000000):> void;
t when timerafter(time+5000000+40000000):> void;
}
}
@@ -1049,7 +1049,7 @@ int AudioEndpointRequests_1(XUD_ep ep0_out, XUD_ep ep0_in, USB_SetupPacket_t &sp
timer t;
unsigned time;
t :> time;
t when timerafter(time+50000000):> void;
t when timerafter(time+50000000+40000000):> void;
}
}
}