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

Updates for new S/PDIF receiver (#348)

Browse Source 
* Updates for new S/PDIF receiver
* Fixed some whitespace issues
This commit is contained in:
Ross Owen
2023-09-28 17:21:29 +01:00
committed by GitHub
parent 07ffd9221a
commit bd702db2c6
2 changed files with 28 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
lib_xua/src/core/clocking/clockgen.xc
View File

@@ -1,6 +1,5 @@
// Copyright 2011-2023 XMOS LIMITED.
// This Software is subject to the terms of the XMOS Public Licence: Version 1.
#include <xs1.h>
#include <assert.h>
#include <print.h>
@@ -141,9 +140,6 @@ static inline void setClockValidity(chanend c_interruptControl, int clkIndex, in
}
}
/* Returns 1 for valid clock found else 0 */
static inline int validSamples(Counter &counter, int clockIndex)
{
@@ -219,18 +215,6 @@ static inline int validSamples(Counter &counter, int clockIndex)
}
#endif
#if (XUA_SPDIF_RX_EN)
//:badParity
/* Returns 1 for bad parity, else 0 */
static inline int badParity(unsigned x)
{
unsigned X = (x>>4);
crc32(X, 0, 1);
return X & 1;
}
//:
#endif
#ifdef LEVEL_METER_LEDS
void VendorLedRefresh(unsigned levelData[]);
unsigned g_inputLevelData[NUM_USB_CHAN_IN];
@@ -262,16 +246,17 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
#if (XUA_SPDIF_RX_EN)
/* S/PDIF buffer state */
int spdifSamples[MAX_SPDIF_SAMPLES]; /* S/PDIF sample buffer */
int spdifWr = 0; /* Write index */
int spdifRd = 0; /* Read index */ //(spdifWriteIndex ^ (MAX_SPDIF_SAMPLES >> 1)) & ~1; // Start in middle
int spdifOverflow = 0; /* Overflow/undeflow flags */
int spdifSamples[MAX_SPDIF_SAMPLES]; /* S/PDIF sample buffer */
int spdifWr = 0; /* Write index */
int spdifRd = 0; /* Read index */ //(spdifWriteIndex ^ (MAX_SPDIF_SAMPLES >> 1)) & ~1; // Start in middle
int spdifOverflow = 0; /* Overflow/undeflow flags */
int spdifUnderflow = 1;
int spdifSamps = 0; /* Number of samples in buffer */
Counter spdifCounters;
int spdifReceivedTime;
int spdifRxTime;
unsigned tmp2;
unsigned spdifLeft = 0;
unsigned spdifRxData;
#endif
#if (XUA_ADAT_RX_EN)
@@ -330,7 +315,6 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
adatCounters.samplesPerTick = 0;
#endif
t_local :> timeNextEdge;
timeLastEdge = timeNextEdge;
timeNextClockDetection = timeNextEdge + (LOCAL_CLOCK_INCREMENT / 2);
@@ -390,8 +374,8 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
break;
#endif
/* Updates to clock settings from endpoint 0 */
case inuint_byref(c_clk_ctl, tmp):
/* Updates to clock settings from endpoint 0 */
case inuint_byref(c_clk_ctl, tmp):
switch(tmp)
{
case GET_SEL:
@@ -465,7 +449,7 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
break;
}
break;
break;
/* Generate local clock from timer */
case t_local when timerafter(timeNextEdge) :> void:
@@ -521,25 +505,24 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
#endif
#if (XUA_SPDIF_RX_EN)
/* Receive sample from S/PDIF RX thread (steaming chan) */
case c_spdif_rx :> tmp:
/* Receive sample from S/PDIF RX thread (streaming chan) */
case c_spdif_rx :> spdifRxData:
/* Record time of sample */
t_local :> spdifReceivedTime;
t_local :> spdifRxTime;
/* Check parity and ignore if bad */
if(badParity(tmp))
if(spdif_check_parity(spdifRxData))
continue;
/* Get pre-amble */
tmp2 = tmp & 0xF;
switch(tmp2)
/* Get preamble */
unsigned preamble = spdifRxData & SPDIF_RX_PREAMBLE_MASK;
switch(preamble)
{
/* LEFT */
case SPDIF_FRAME_X:
case SPDIF_FRAME_Z:
spdifLeft = tmp << 4;
spdifLeft = SPDIF_RX_EXTRACT_SAMPLE(spdifRxData);
break;
/* RIGHT */
@@ -550,7 +533,7 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
{
/* Store left and right sample pair to buffer */
spdifSamples[spdifWr] = spdifLeft;
spdifSamples[spdifWr+1] = tmp << 4;
spdifSamples[spdifWr+1] = SPDIF_RX_EXTRACT_SAMPLE(spdifRxData);
spdifWr = (spdifWr + 2) & (MAX_SPDIF_SAMPLES - 1);
@@ -586,13 +569,13 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
if((spdifCounters.receivedSamples >= spdifCounters.samplesPerTick))
{
/* Check edge is about right... S/PDIF may have changed freq... */
if(timeafter(spdifReceivedTime, (timeLastEdge + LOCAL_CLOCK_INCREMENT - LOCAL_CLOCK_MARGIN)))
if(timeafter(spdifRxTime, (timeLastEdge + LOCAL_CLOCK_INCREMENT - LOCAL_CLOCK_MARGIN)))
{
/* Record edge time */
timeLastEdge = spdifReceivedTime;
timeLastEdge = spdifRxTime;
/* Setup for next edge */
timeNextEdge = spdifReceivedTime + LOCAL_CLOCK_INCREMENT + LOCAL_CLOCK_MARGIN;
timeNextEdge = spdifRxTime + LOCAL_CLOCK_INCREMENT + LOCAL_CLOCK_MARGIN;
/* Toggle edge */
i_pll_ref.toggle_timed(1);
@@ -705,7 +688,6 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
/* Reset counters */
adatCounters.receivedSamples = 0;
}
}
}
@@ -716,10 +698,9 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
break;
#endif
#if (XUA_SPDIF_RX_EN || XUA_ADAT_RX_EN)
/* AudioHub requests data */
case inuint_byref(c_dig_rx, tmp):
/* AudioHub requests data */
case inuint_byref(c_dig_rx, tmp):
#if (XUA_SPDIF_RX_EN)
if(spdifUnderflow)
{
@@ -734,7 +715,7 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
tmp2 = spdifSamples[spdifRd + 1];
spdifRd += 2;
spdifRd &= (MAX_SPDIF_SAMPLES - 1);
spdifRd &= (MAX_SPDIF_SAMPLES - 1);
g_digData[0] = tmp;
g_digData[1] = tmp2;
@@ -839,11 +820,9 @@ void clockGen (streaming chanend ?c_spdif_rx, chanend ?c_adat_rx, client interfa
}
#endif
outuint(c_dig_rx, 1);
break;
break;
#endif
}
}
}

10
lib_xua/src/core/main.xc
View File

@@ -30,8 +30,8 @@
#include "iap.h"
#endif
#if (XUA_SPDIF_RX_EN)
#include "spdif.h"
#if (XUA_SPDIF_RX_EN || XUA_SPDIF_TX_EN)
#include "spdif.h" /* From lib_spdif */
#endif
#if (XUA_ADAT_RX_EN)
@@ -42,10 +42,6 @@
#include "xua_pdm_mic.h"
#endif
#if (XUA_SPDIF_TX_EN)
#include "spdif.h" /* From lib_spdif */
#endif
#if (XUA_DFU_EN == 1)
[[distributable]]
void DFUHandler(server interface i_dfu i, chanend ?c_user_cmd);
@@ -643,7 +639,7 @@ int main()
on tile[XUD_TILE]:
{
thread_speed();
spdif_rx(c_spdif_rx,p_spdif_rx,clk_spd_rx,192000);
spdif_rx(c_spdif_rx, p_spdif_rx, clk_spd_rx, 192000);
}
#endif