Symbols ![]()
loading (1/5)...
Files ![]()
loading (3/5)...
i2s_alloc_dma_desc() function
Allocate memory for I2S DMA descriptor and DMA buffer
Syntax
Implemented in ![]()
i2s_common.c:484
Return value
- ESP_OK Allocate memory success - ESP_ERR_INVALID_ARG NULL pointer or bufsize is too big - ESP_ERR_NO_MEM No memory for DMA descriptor and DMA buffer
Related Functions
Found 47 other functions taking a ![]()
i2s_channel_obj_t
argument:
Function
Description
Check gpio validity and attach to corresponding signal
Enable the I2S channel
Allocate new I2S channel(s)
Disable the I2S channel
Delete the I2S channel
I2S write data
Initialize I2S channel to standard mode
Free I2S DMA descriptor and DMA buffer
Revoke the GPIO that configured as I2S output signal
I2S read data
Initialize I2S DMA interrupt
Reserve the GPIO that configured as I2S output signal
Get DMA buffer size
Preload the data into TX DMA buffer
Reconfigure the I2S clock for standard mode
Reconfigure the I2S slot for standard mode
Attach data out signal and data in signal to a same gpio
Check gpio validity and output mclk signal
Initialize I2S channel to PDM RX mode
Initialize I2S channel to PDM TX mode
Set event callbacks for I2S channel
Get I2S channel information
Reconfigure the I2S GPIO for standard mode
Reconfigure the I2S clock for PDM RX mode
Reconfigure the I2S GPIO for PDM TX mode
Reconfigure the I2S clock for PDM TX mode
Reconfigure the I2S slot for PDM TX mode
Reconfigure the I2S GPIO for PDM RX mode
Reconfigure the I2S slot for PDM RX mode
References
Code
Location
Referrer
Call Tree
i2s_alloc_dma_desc() is called by 3 functions and calls 6 functions:
Data Use
i2s_alloc_dma_desc() reads 16 variables and writes 11 variables: