SourceVu will show references to I2S_PDM_TX_CLK_DEFAULT_CONFIG from the following samples and libraries:
Symbols ![]()
loading...
Files ![]()
loading...
I2S_PDM_TX_CLK_DEFAULT_CONFIG macro
I2S default PDM TX clock configuration for codec line mode
Syntax
#define I2S_PDM_TX_CLK_DEFAULT_CONFIG(rate) { \
.sample_rate_hz = rate, \
.clk_src = I2S_CLK_SRC_DEFAULT, \
.mclk_multiple = I2S_MCLK_MULTIPLE_256, \
.up_sample_fp = 960, \
.up_sample_fs = 480, \
.bclk_div = 8, \
}
Notes
TX PDM can only be set to the following two up-sampling rate configurations: 1: fp = 960, fs = sample_rate_hz / 100, in this case, Fpdm = 128*48000 2: fp = 960, fs = 480, in this case, Fpdm = 128*Fpcm = 128*sample_rate_hz If the PDM receiver do not care the PDM serial clock, it's recommended set Fpdm = 128*48000. Otherwise, the second configuration should be adopted.