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Refactor sync mode c_sof code

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Ed
2024-01-23 12:40:15 +00:00
parent 44049ecfca
commit 7febbfdcd0
1 changed files with 31 additions and 28 deletions
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59
lib_xua/src/core/buffer/ep/ep_buffer.xc
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@@ -263,7 +263,6 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
unsigned bufferIn = 1; unsigned bufferIn = 1;
#endif #endif
int sofCount = 0; int sofCount = 0;
int pllUpdate = 0;
unsigned mod_from_last_time = 0; unsigned mod_from_last_time = 0;
#ifdef FB_TOLERANCE_TEST #ifdef FB_TOLERANCE_TEST
@@ -463,7 +462,6 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
/* Note, Endpoint 0 will hold off host for a sufficient period to allow our feedback /* Note, Endpoint 0 will hold off host for a sufficient period to allow our feedback
* to stabilise (i.e. sofCount == 128 to fire) */ * to stabilise (i.e. sofCount == 128 to fire) */
sofCount = 0; sofCount = 0;
pllUpdate = 0;
clocks = 0; clocks = 0;
clockcounter = 0; clockcounter = 0;
mod_from_last_time = 0; mod_from_last_time = 0;
@@ -559,35 +557,23 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
/* SOF notification from XUD_Manager() */ /* SOF notification from XUD_Manager() */
case inuint_byref(c_sof, u_tmp): case inuint_byref(c_sof, u_tmp):
#if (XUA_SYNCMODE == XUA_SYNCMODE_SYNC) #if (XUA_SYNCMODE == XUA_SYNCMODE_SYNC)
/* This really could (should) be done in decouple. However, for a quick demo this is okay
* Decouple expects a 16:16 number in fixed point stored in the global g_speed */
unsigned usbSpeed; unsigned usbSpeed;
int framesPerSec;
GET_SHARED_GLOBAL(usbSpeed, g_curUsbSpeed); GET_SHARED_GLOBAL(usbSpeed, g_curUsbSpeed);
static int sofCount = 0;
framesPerSec = (usbSpeed == XUD_SPEED_HS) ? 8000 : 1000;
clocks = ((int64_t) sampleFreq << 16) / framesPerSec;
asm volatile("stw %0, dp[g_speed]"::"r"(clocks));
sofCount += 1000;
if (sofCount == framesPerSec)
{
sofCount = 0;
pllUpdate++;
#if (!XUA_USE_SW_PLL)
/* Port is accessed via interface to allow flexibilty with location */
i_pll_ref.toggle();
t_sofCheck :> timeLastEdge;
timeNextEdge = timeLastEdge + LOCAL_CLOCK_INCREMENT + LOCAL_CLOCK_MARGIN;
#endif
}
#if (XUA_USE_SW_PLL) #if (XUA_USE_SW_PLL)
// Update PLL @ 100Hz /* Run PFD and sw_pll controller at 100Hz */
if(pllUpdate == 10) const int sofFreqDivider = (usbSpeed == XUD_SPEED_HS) ? (8000 / controller_rate_hz) : (1000 / controller_rate_hz);
#else /* (XUA_USE_SW_PLL) */
/* 1000 toggles per second for CS2100 reference -> 500 Hz */
const int toggleRateHz = 1000;
const int sofFreqDivider = (usbSpeed == XUD_SPEED_HS) ? (8000 / toggleRateHz) : (1000 / toggleRateHz);
#endif /* (XUA_USE_SW_PLL) */
sofCount++;
if (sofCount == sofFreqDivider)
{ {
pllUpdate = 0; #if (XUA_USE_SW_PLL)
/* Grab port timer count, run through PFD and send to sw_pll */
unsigned short mclk_pt; unsigned short mclk_pt;
asm volatile("getts %0, res[%1]" : "=r" (mclk_pt) : "r" (p_off_mclk)); asm volatile("getts %0, res[%1]" : "=r" (mclk_pt) : "r" (p_off_mclk));
@@ -603,12 +589,29 @@ void XUA_Buffer_Ep(register chanend c_aud_out,
} }
sw_pll_pfd.mclk_pt_last = mclk_pt; sw_pll_pfd.mclk_pt_last = mclk_pt;
/* Send error to sw_pll */
outuint(c_sw_pll, error); outuint(c_sw_pll, error);
outct(c_sw_pll, XS1_CT_END); outct(c_sw_pll, XS1_CT_END);
printintln(error); printintln(error);
#else /* (XUA_USE_SW_PLL) */
/* Do toggle for CS2100 reference clock */
/* Port is accessed via interface to allow flexibilty with location */
i_pll_ref.toggle();
t_sofCheck :> timeLastEdge;
timeNextEdge = timeLastEdge + LOCAL_CLOCK_INCREMENT + LOCAL_CLOCK_MARGIN;
#endif /* (XUA_USE_SW_PLL) */
sofCount = 0;
} }
#endif
/* This really could (should) be done in decouple. However, for a quick demo this is okay
* Decouple expects a 16:16 number in fixed point stored in the global g_speed */
const int framesPerSec = (usbSpeed == XUD_SPEED_HS) ? 8000 : 1000;
clocks = ((int64_t) sampleFreq << 16) / framesPerSec;
asm volatile("stw %0, dp[g_speed]"::"r"(clocks));
#elif (XUA_SYNCMODE == XUA_SYNCMODE_ASYNC) #elif (XUA_SYNCMODE == XUA_SYNCMODE_ASYNC)