dengweijie/lib_xua
1
0
Fork 0
forked from PAWPAW-Mirror/lib_xua
Code Pull Requests Activity

Freer requires outct CT_END negociation in both ways before closing down.

Browse Source
This commit is contained in:
Russell
2012-01-09 16:11:32 +00:00
parent 541ee1af81
commit dd5e086088
3 changed files with 178 additions and 147 deletions
Download Patch File Download Diff File Expand all files Collapse all files

137
module_usb_aud_shared/usb_buffer/usb_buffer.xc
View File

@@ -261,7 +261,6 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
/* End XUD_SetData */
}
#endif
asm("stw %0, dp[g_intFlag]" :: "r" (0) );
XUD_SetNotReady(ep_int);
break;
@@ -269,73 +268,81 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
#endif
/* Sample Freq our chan count update from ep 0 */
case inuint_byref(c_aud_ctl, tmp):
case testct_byref(c_aud_ctl, tmp):
{
int min, mid, max;
int usb_speed;
int frameTime;
asm("ldw %0, dp[g_curUsbSpeed]" : "=r" (usb_speed) :);
if(tmp == SET_SAMPLE_FREQ)
{
sampleFreq = inuint(c_aud_ctl);
/* Tidy up double buffer, note we can do better than this for 44.1 etc but better
* than sending two packets at old speed! */
if (usb_speed == XUD_SPEED_HS)
frameTime = 8000;
else
frameTime = 1000;
min = sampleFreq / frameTime;
max = min + 1;
if (tmp) {
// is a control token sent by reboot_device
inct(c_aud_ctl);
outct(c_aud_ctl, XS1_CT_END);
while(1) {};
} else {
int min, mid, max;
int usb_speed;
int frameTime;
tmp = inuint(c_aud_ctl);
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
if(tmp == SET_SAMPLE_FREQ)
{
sampleFreq = inuint(c_aud_ctl);
mid = min;
/* Check for INT(SampFreq/8000) == SampFreq/8000 */
if((sampleFreq % frameTime) == 0)
{
min -= 1;
}
#ifdef FB_TOLERANCE_TEST
expected_fb = ((sampleFreq * 0x2000) / frametime);
#endif
asm("stw %0, dp[g_speed]"::"r"(mid << 16));
if (usb_speed == XUD_SPEED_HS)
mid *= NUM_USB_CHAN_IN*4;
else
mid *= NUM_USB_CHAN_IN*3;
asm("stw %0, %1[0]"::"r"(mid),"r"(inZeroBuff));
/* Reset FB */
/* Note, Endpoint 0 will hold off host for a sufficient period to allow out feedback
* to stabilise (i.e. sofCount == 128 to fire) */
sofCount = 0;
clocks = 0;
remnant = 0;
/* Ideally we want to wait for handshake (and pass back up) here. But we cannot keep this
* thread locked, it must stay responsive to packets/SOFs. So, set a flag and check for
* handshake elsewhere */
/* Pass on sample freq change to decouple */
SET_SHARED_GLOBAL(g_freqChange, SET_SAMPLE_FREQ);
SET_SHARED_GLOBAL(g_freqChange_sampFreq, sampleFreq);
SET_SHARED_GLOBAL(g_freqChange_flag, SET_SAMPLE_FREQ);
/* Tidy up double buffer, note we can do better than this for 44.1 etc but better
* than sending two packets at old speed! */
if (usb_speed == XUD_SPEED_HS)
frameTime = 8000;
else
frameTime = 1000;
min = sampleFreq / frameTime;
max = min + 1;
mid = min;
/* Check for INT(SampFreq/8000) == SampFreq/8000 */
if((sampleFreq % frameTime) == 0)
{
min -= 1;
}
#ifdef FB_TOLERANCE_TEST
expected_fb = ((sampleFreq * 0x2000) / frametime);
#endif
asm("stw %0, dp[g_speed]"::"r"(mid << 16));
if (usb_speed == XUD_SPEED_HS)
mid *= NUM_USB_CHAN_IN*4;
else
mid *= NUM_USB_CHAN_IN*3;
asm("stw %0, %1[0]"::"r"(mid),"r"(inZeroBuff));
/* Reset FB */
/* Note, Endpoint 0 will hold off host for a sufficient period to allow out feedback
* to stabilise (i.e. sofCount == 128 to fire) */
sofCount = 0;
clocks = 0;
remnant = 0;
/* Ideally we want to wait for handshake (and pass back up) here. But we cannot keep this
* thread locked, it must stay responsive to packets/SOFs. So, set a flag and check for
* handshake elsewhere */
/* Pass on sample freq change to decouple */
SET_SHARED_GLOBAL(g_freqChange, SET_SAMPLE_FREQ);
SET_SHARED_GLOBAL(g_freqChange_sampFreq, sampleFreq);
SET_SHARED_GLOBAL(g_freqChange_flag, SET_SAMPLE_FREQ);
}
else
{
sampleFreq = inuint(c_aud_ctl);
SET_SHARED_GLOBAL(g_freqChange, tmp); /* Set command */
SET_SHARED_GLOBAL(g_freqChange_sampFreq, sampleFreq); /* Set flag */
SET_SHARED_GLOBAL(g_freqChange_flag, tmp);
}
}
else
{
sampleFreq = inuint(c_aud_ctl);
SET_SHARED_GLOBAL(g_freqChange, tmp); /* Set command */
SET_SHARED_GLOBAL(g_freqChange_sampFreq, sampleFreq); /* Set flag */
SET_SHARED_GLOBAL(g_freqChange_flag, tmp);
}
break;
}