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Removed explicit wait loop for aud_ctl_chan global. Now relies on setup of aud_to/from_host flag globals.

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This commit is contained in:
Ross Owen
2014-02-20 13:32:35 +00:00
parent fbdfdff31c
commit 4ed3fbfab6
1 changed files with 10 additions and 28 deletions
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38
module_usb_audio/usb_buffer/decouple.xc
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@@ -707,32 +707,25 @@ void decouple(chanend c_mix_out,
#ifndef OUT_VOLUME_IN_MIXER
for (int i = 0; i < NUM_USB_CHAN_OUT + 1; i++)
{
asm("stw %0, %1[%2]"::"r"(MAX_VOL),"r"(p_multOut),"r"(i));
asm("stw %0, %1[%2]"::"r"(MAX_VOL),"r"(p_multOut),"r"(i));
}
#endif
#ifndef IN_VOLUME_IN_MIXER
for (int i = 0; i < NUM_USB_CHAN_IN + 1; i++)
{
asm("stw %0, %1[%2]"::"r"(MAX_VOL),"r"(p_multIn),"r"(i));
asm("stw %0, %1[%2]"::"r"(MAX_VOL),"r"(p_multIn),"r"(i));
}
#endif
{ int c=0;
while(!c) {
asm("ldw %0, dp[buffer_aud_ctl_chan]":"=r"(c));
}
}
set_interrupt_handler(handle_audio_request, 200, 1, c_mix_out, 0);
/* Wait for usb_buffer() to set up globals for us to use
* Note: assumed that buffer_aud_ctl_chan is also setup before these globals are !0 */
#ifdef OUTPUT
// wait for usb_buffer to set up
while(!aud_from_host_flag)
{
GET_SHARED_GLOBAL(aud_from_host_flag, g_aud_from_host_flag);
GET_SHARED_GLOBAL(aud_from_host_flag, g_aud_from_host_flag);
}
aud_from_host_flag = 0;
@@ -744,30 +737,19 @@ void decouple(chanend c_mix_out,
#endif
#ifdef INPUT
// Wait for usb_buffer to set up
/* Wait for usb_buffer to set up */
while(!aud_to_host_flag)
{
GET_SHARED_GLOBAL(aud_to_host_flag, g_aud_to_host_flag);
GET_SHARED_GLOBAL(aud_to_host_flag, g_aud_to_host_flag);
}
aud_to_host_flag = 0;
SET_SHARED_GLOBAL(g_aud_to_host_flag, aud_to_host_flag);
/* NOTE: IN EP not marked ready at this point - Intial size of zero buffer not set
/* NOTE: IN EP not marked ready at this point - Initial size of zero buffer not known
* since we don't know the USB bus-speed yet.
* The host will send a SetAltInterface before streaming which will lead to this core
* getting a SET_CHANNEL_COUNT_IN. This will setup the EP for the first packet */
#if 0
// send the current host -> device buffer out of the fifo
SET_SHARED_GLOBAL(g_aud_to_host_buffer, g_aud_to_host_zeros);
{
xc_ptr p;
int len;
GET_SHARED_GLOBAL(p, g_aud_to_host_buffer);
read_via_xc_ptr(len, p)
XUD_SetReady_InPtr(aud_to_host_usb_ep, g_aud_to_host_buffer, len);
}
#endif
#endif
while(1)