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* Sync mode: added basic move to internal clock when SOF clock not available (not change over on plug event is not smooth)

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* Sync mode: Removed use of float
This commit is contained in:
xross
2022-08-03 15:11:26 +01:00
parent 9fdacb2903
commit 4f36ce4df7
1 changed files with 25 additions and 6 deletions
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31
lib_xua/src/core/buffer/ep/ep_buffer.xc
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@@ -3,8 +3,7 @@
#include "xua.h"
#if XUA_USB_EN
#include <xs1.h>
#include <print.h>
#include <stdint.h>
#ifdef MIDI
#include "usb_midi.h"
@@ -357,7 +356,17 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
#endif
#endif
timer tmr;
#if (XUA_SYNCMODE == XUA_SYNCMODE_SYNC)
#define LOCAL_CLOCK_INCREMENT 100000 /* 500Hz */
#define LOCAL_CLOCK_MARGIN 1000
int sofClockValid = 0;
timer t_sofCheck;
unsigned timeLastEdge;
unsigned timeNextEdge;
t_sofCheck :> timeLastEdge;
timeNextEdge + LOCAL_CLOCK_INCREMENT;
i_pll_ref.toggle();
#endif
while(1)
{
@@ -501,6 +510,14 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
SET_SHARED_GLOBAL(g_freqChange_flag, cmd); /* Set Flag */
}
break;
#if (XUA_SYNCMODE == XUA_SYNCMODE_SYNC)
case t_sofCheck when timerafter(timeNextEdge) :> void:
i_pll_ref.toggle();
timeLastEdge = timeNextEdge;
timeNextEdge += LOCAL_CLOCK_INCREMENT;
break;
#endif
}
#define MASK_16_13 (7) /* Bits that should not be transmitted as part of feedback */
@@ -517,12 +534,11 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
int framesPerSec;
GET_SHARED_GLOBAL(usbSpeed, g_curUsbSpeed);
static int sofCount = 0;
static unsigned syncPinVal = 0;
framesPerSec = (usbSpeed == XUD_SPEED_HS) ? 8000 : 1000;
float float_clocks = (float) sampleFreq/framesPerSec ;
clocks = (unsigned) (float_clocks * (1 << 16));
clocks = ((int64_t) sampleFreq << 16) / framesPerSec;
asm volatile("stw %0, dp[g_speed]"::"r"(clocks));
sofCount += 1000;
@@ -530,7 +546,9 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
{
/* Port is accessed via interface to allow flexibilty with location */
i_pll_ref.toggle();
t_sofCheck :> timeLastEdge;
sofCount = 0;
timeNextEdge = timeLastEdge + LOCAL_CLOCK_INCREMENT + LOCAL_CLOCK_MARGIN;
}
#else
@@ -889,6 +907,7 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
case XUD_SetData_Select(c_hid, ep_hid, result):
hid_ready_flag = 0U;
unsigned reportTime;
timer tmr;
tmr :> reportTime;
hidCaptureReportTime(hid_ready_id, reportTime);
hidCalcNextReportTime(hid_ready_id);