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Variable i2s bit width (#331)

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- Add support for variable width I2S (via XUA_I2S_N_BITS)
- Add support for variable width TDM (again via XUD_I2S_N_BITS when XUA_PCM_FORMAT=XUA_PCM_FORMAT_TDM)
- Includes support for xcore as I2S/TDM master and slave
- Add testing of the the above to test_i2s_loopback
- Rationalised test config building in test_i2s_loopback
- Documentation updated
This commit is contained in:
Ross Owen
2023-06-08 15:31:12 +01:00
committed by GitHub
parent d3ad29e8a6
commit 1ef5129fde
16 changed files with 221 additions and 196 deletions
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5
tests/test_i2s_loopback/simulation.xc
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@@ -1,4 +1,4 @@
// Copyright 2016-2022 XMOS LIMITED.
// Copyright 2016-2023 XMOS LIMITED.
// This Software is subject to the terms of the XMOS Public Licence: Version 1.
#ifdef SIMULATION
@@ -41,7 +41,7 @@ extern out port p_lrclk_gen;
extern clock clk_audio_lrclk_gen;
void slave_mode_clk_setup(const unsigned samFreq, const unsigned chans_per_frame){
const unsigned data_bits = 32;
const unsigned data_bits = XUA_I2S_N_BITS;
const unsigned mclk_freq = 24576000;
const unsigned mclk_bclk_ratio = mclk_freq / (chans_per_frame * samFreq * data_bits);
@@ -61,5 +61,4 @@ void slave_mode_clk_setup(const unsigned samFreq, const unsigned chans_per_frame
master_mode_clk_setup();
}
#endif
#endif