#[repr(C)]
pub struct i2s_pdm_tx_upsample_cfg_t { pub sample_rate: c_int, pub fp: c_int, pub fs: c_int, }
Expand description

@brief I2S PDM up-sample rate configuration @note TX PDM can only be set to the following two upsampling rate configurations: 1: fp = 960, fs = sample_rate / 100, in this case, Fpdm = 12848000 2: fp = 960, fs = 480, in this case, Fpdm = 128Fpcm = 128sample_rate If the pdm receiver do not care the pdm serial clock, it’s recommended set Fpdm = 12848000. Otherwise, the second configuration should be applied.

Fields

sample_rate: c_int

< I2S PDM sample rate

fp: c_int

< I2S PDM TX upsampling paramater. Normally it should be set to 960

fs: c_int

< I2S PDM TX upsampling paramater. When it is set to 480, the pdm clock frequency Fpdm = 128 * sample_rate, when it is set to sample_rate / 100, Fpdm will be fixed to 128*48000

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