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Fixed issue with I2S xcore-slave mode on L1/SU1 where the master clock-block does not have a source causing bad feedback

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This commit is contained in:
Ross Owen
2012-09-14 16:10:50 +01:00
parent e769059a81
commit c5f3867c62
2 changed files with 14 additions and 2 deletions
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6
module_usb_audio/main.xc
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@@ -87,8 +87,14 @@ on stdcore[0] : buffered in port:32 p_i2s_adc[I2S_WIRES_ADC] =
#define AUDIO_IO_CORE 0
#endif
#if CODEC_SLAVE == 1
on stdcore[AUDIO_IO_CORE] : buffered out port:32 p_lrclk = PORT_I2S_LRCLK;
on stdcore[AUDIO_IO_CORE] : buffered out port:32 p_bclk = PORT_I2S_BCLK;
#else
on stdcore[AUDIO_IO_CORE] : in port p_lrclk = PORT_I2S_LRCLK;
on stdcore[AUDIO_IO_CORE] : in port p_bclk = PORT_I2S_BCLK;
#endif
on stdcore[AUDIO_IO_CORE] : port p_mclk = PORT_MCLK_IN;
on stdcore[0] : in port p_for_mclk_count = PORT_MCLK_COUNT;

10
module_usb_audio/ports/audioports.xc
View File

@@ -110,11 +110,16 @@ void ConfigAudioPorts(unsigned int divide)
/* Pause until output completes */
sync(p_bclk);
#else
/* Stop bit and master clock blocks and clear port buffers */
#else /* CODEC_SLAVE = 1 */
/* Stop bit and master clock blocks */
stop_clock(clk_audio_bclk);
stop_clock(clk_audio_mclk);
/* 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);
/* Clock bclk clock-block from bclk pin */
configure_clock_src(clk_audio_bclk, p_bclk);
@@ -133,6 +138,7 @@ void ConfigAudioPorts(unsigned int divide)
configure_in_port_no_ready(p_lrclk, clk_audio_bclk);
start_clock(clk_audio_bclk);
start_clock(clk_audio_mclk);
#endif
}