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More work on DSD - work in progress

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This commit is contained in:
Ross Owen
2013-06-18 15:24:36 +01:00
parent 9f65af2912
commit 7c97fbdb82
4 changed files with 46 additions and 23 deletions
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3
module_usb_audio/ports/audioports.c
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@@ -1,5 +1,6 @@
#include <xccompat.h>
#include "devicedefines.h"
#include "audioports.h"
//#define p_dsd_left p_i2s_dac[0]
@@ -28,6 +29,8 @@ dsdPorts[0] = PORT_DSD_DAC0;
#endif
/* C wrapper for ConfigAudioPorts() such that we can mess around with arrays of ports */
void ConfigAudioPortsWrapper(
#if (I2S_CHANS_DAC != 0)
port p_i2s_dac[I2S_WIRES_DAC],

34
module_usb_audio/ports/audioports.xc
View File

@@ -3,13 +3,29 @@
#include "devicedefines.h"
#include "audioports.h"
/* Configure audio ports. This is in C such that can we can mess around with arrays of ports */
#ifdef DSD_OUTPUT
#error Building audioports with DSD
#ifndef p_dsd_clk
buffered out port:32 p_dsd_clk = P_DSD_CLK;
#endif
//extern void configure_in_port_no_ready(port p, const clock clk);
//extern void configure_out_port_no_ready(port p, const clock clk, unsigned initial);
//extern void configure_clock_src(clock clk, port p);
#ifndef p_dsd_left
extern buffered out port:32 p_dsd_left;
#endif
extern port p_mclk;
#ifndef p_dsd_right
extern buffered out port:32 p_dsd_right;
#endif
#if I2S_WIRES_DAC > 0
#ifndef p_dsd_dac0
on tile[0] : buffered out port:32 p_dsd_dac0 = PORT_DSD_DAC0;
#endif
dsdPorts[0] = PORT_DSD_DAC0;
#endif
#endif
extern port p_mclk_in;
extern clock clk_audio_mclk;
extern clock clk_audio_bclk;
@@ -68,7 +84,7 @@ unsigned int divide)
#endif
/* Clock master clock-block from master-clock port */
configure_clock_src(clk_audio_mclk, p_mclk);
configure_clock_src(clk_audio_mclk, p_mclk_in);
/* For a divide of one (i.e. bitclock == master-clock) BClk is set to clock_output mode.
* In this mode it outputs an edge clock on every tick of itsassociated clock_block.
@@ -127,7 +143,7 @@ unsigned int divide)
/* Clock master clock-block from master-clock port -
* though not directly used in I2S slave mode it is required for FB */
configure_clock_src(clk_audio_mclk, p_mclk);
configure_clock_src(clk_audio_mclk, p_mclk_in);
/* Clock bclk clock-block from bclk pin */
configure_clock_src(clk_audio_bclk, p_bclk);
@@ -161,7 +177,7 @@ void ConfigAudioPorts_dsd(unsigned int divide)
* Required as stop_clock will only complete when the clock is low
*/
//configure_out_port_no_ready(p_dsd_clk, clk_audio_bclk, 0);
//configure_clock_src(clk_audio_mclk, p_mclk);
//configure_clock_src(clk_audio_mclk, p_mclk_in);
configure_out_port_no_ready(p_dsd_clk, clk_audio_mclk, 0);
p_dsd_clk <: 0;
@@ -174,7 +190,7 @@ void ConfigAudioPorts_dsd(unsigned int divide)
clearbuf(p_dsd_right);
/* Clock master clock-block from master-clock port */
configure_clock_src(clk_audio_mclk, p_mclk);
configure_clock_src(clk_audio_mclk, p_mclk_in);
/* For a divide of one (i.e. bitclock == master-clock) BClk is set to clock_output mode.
* In this mode it outputs an edge clock on every tick of itsassociated clock_block.