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Fix up channel alignment issue in slave mode TDM

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This commit is contained in:
Ross Owen
2015-01-09 15:55:13 +00:00
parent 7f53fc08ee
commit b2e848e9b4
1 changed files with 12 additions and 3 deletions
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15
module_usb_audio/audio.xc
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@@ -340,13 +340,22 @@ static inline void InitPorts(unsigned divide)
#endif
#else /* ifndef CODEC_MASTER */
/* Wait for LRCLK edge */
/* Wait for LRCLK edge (in I2S LRCLK = 0 is left, TDM rising edge is start of frame) */
p_lrclk when pinseq(0) :> void;
p_lrclk when pinseq(1) :> void;
p_lrclk when pinseq(0) :> void;
p_lrclk when pinseq(1) :> void;
#ifdef I2S_MODE_TDM
p_lrclk when pinseq(0) :> void;
p_lrclk when pinseq(1) :> void @ tmp;
#else
p_lrclk when pinseq(0) :> void @ tmp;
tmp+=97;
#endif
tmp += (I2S_CHANS_PER_FRAME * 32) - 32 + 1 ;
/* E.g. 2 * 32 - 32 + 1 = 33 for stereo */
/* E..g 8 * 32 - 32 + 1 = 225 for 8 chan TDM */
#if (I2S_CHANS_DAC != 0)
#pragma loop unroll
for(int i = 0; i < I2S_WIRES_DAC; i++)
@@ -359,7 +368,7 @@ static inline void InitPorts(unsigned divide)
#pragma loop unroll
for(int i = 0; i < I2S_WIRES_ADC; i++)
{
asm("setpt res[%0], %1"::"r"(p_i2s_adc[i]),"r"(tmp+31));
asm("setpt res[%0], %1"::"r"(p_i2s_adc[i]),"r"(tmp+31));
}
#endif
#endif