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i2s_ll_tx_set_pdm_over_sample_ratio() function
Set the PDM TX over sampling ratio
Syntax
Related Functions
Found 80 other functions taking a ![]()
i2s_dev_s
argument:
Function
Description
Enable I2S DMA
Clear I2S interrupt status
Reset I2S TX module
Get I2S interrupt status
Start TX module
Stop TX module
Enable I2S loopback mode
Enable interrupt by mask
Start out link
Reset I2S RX module
Enable I2S built-in ADC/DAC mode
Set TX source clock
Stop RX module
Stop in link
I2S tx right channel first
Enable I2S TX slave mode
Get I2S in eof descriptor address
Set I2S tx bits mod
Configure TX chan bit and audio data bit, on ESP32, sample_bit should equals to data_bit
Configure RX chan bit and audio data bit, on ESP32, sample_bit should equals to data_bit
Enable TX MSB shift, the data will be launch at the first BCK clock
Enable TX mono mode
Enable RX mono mode
Reset I2S RX FIFO
Set RX source clock
Enable DMA descriptor write back
Reset dma out
Reset dma in
Configure RX DMA descriptor address and start RX DMA
I2S tx msb right enable
I2S rx right channel first
I2S tx fifo module force enable
I2S rx fifo module force enable
Reset I2S TX FIFO
Get I2S out eof descriptor address
Configure the received length to trigger in_suc_eof interrupt
Configure TX WS signal width
Configure RX WS signal width
Enable RX MSB shift, the data will be launch at the first BCK clock
Set I2S tx chan mode
Set I2S rx chan mode
Set I2S tx bck div num
Configure I2S TX module clock divider
I2S DMA generate EOF event on data in FIFO popped out
Enable TX interrupt
Disable TX interrupt
Start RX module
Configure TX DMA descriptor address and start TX DMA
Stop out link
I2S rx msb right enable
Enable I2S RX slave mode
Enable I2S TX PDM mode
Enable I2S RX PDM mode
Configure I2S TX PDM sample rate Fpdm = 64*Fpcm*fp/fs
I2S PDM Configurations************************************ Configure RX PDM downsample
Configure I2S module clock divider
Set I2S rx bck div num
Configure I2S RX module clock divider
Enable RX interrupt
Disable RX interrupt
Get channel interrupt status register address
Set I2S out link address
I2S module general init, enable I2S clock.
Enable I2S TX STD mode
Enable I2S RX STD mode
Set I2S TX PDM prescale
Set I2S TX PDM high pass filter scaling
Set I2S TX PDM low pass filter scaling
Set I2S TX PDM sinc filter scaling
Set I2S TX PDM sigma-delta filter scaling
I2S ADC/DAC Configurations********************************** Enable I2S LCD mode
Set whether to continue I2S signal on bus when TX FIFO is empty
Set I2S PDM TX chan mode
Set I2S PDM RX chan mode
Enable DMA descriptor owner check
Get interrupt status register address
Get I2S TX PDM fp configuration parameter
Get I2S TX PDM fs configuration parameter
Enable I2S camera mode
Get RX PDM downsample configuration
References
Code
Location
Referrer
Call Tree
i2s_ll_tx_set_pdm_over_sample_ratio() is called by 2 functions:
Data Use
i2s_ll_tx_set_pdm_over_sample_ratio() reads 1 variable and writes 1 variable: