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Attempt to fix up FS mode for new feedback system - still not operational.

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This commit is contained in:
Ross Owen
2015-11-20 13:46:33 +00:00
parent 196c82e0dd
commit 68faab7ed2
1 changed files with 9 additions and 2 deletions
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11
module_usb_audio/usb_buffer/usb_buffer.xc
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@@ -415,6 +415,8 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in,
unsigned usb_speed; unsigned usb_speed;
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed); GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
#if 0 #if 0
unsigned mask = MASK_16_13; unsigned mask = MASK_16_13;
/* Original feedback implementation */ /* Original feedback implementation */
@@ -477,10 +479,15 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in,
* Average over 128 SOFs - 128 x 3072 = 0x60000. * Average over 128 SOFs - 128 x 3072 = 0x60000.
*/ */
unsigned long long feedbackMul = 64ULL;
if(usb_speed != XUD_SPEED_HS)
feedbackMul = 16ULL;
/* Number of MCLK ticks in this SOF period (E.g = 125 * 24.576 = 3072) */ /* Number of MCLK ticks in this SOF period (E.g = 125 * 24.576 = 3072) */
int count = (int) ((short)(u_tmp - lastClock)); int count = (int) ((short)(u_tmp - lastClock));
unsigned long long full_result = count *64ULL * sampleFreq; unsigned long long full_result = count * feedbackMul * sampleFreq;
clockcounter += full_result; clockcounter += full_result;
@@ -516,7 +523,7 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in,
} }
else else
{ {
(fb_clocks, unsigned[])[0] = clocks>>2; (fb_clocks, unsigned[])[0] = clocks>>1;
} }
} }
#ifdef FB_TOLERANCE_TEST #ifdef FB_TOLERANCE_TEST