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XCORE SDK
XCORE Software Development Kit
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Collection of resources IDs required for PDM capture. More...
#include <pdm_resources.h>
Public Attributes | |
| port_t | p_mclk |
| ID of the 1-bit port on which the master audio clock signal is received. More... | |
| port_t | p_pdm_clk |
| ID of the 1-bit port through which the PDM sample clock is signaled. More... | |
| port_t | p_pdm_mics |
| ID of the port on which PDM samples are received. More... | |
| clock_t | clock_a |
| ID of the clock block used to derive the PDM clock from the master audio clock. More... | |
| clock_t | clock_b |
| ID of the clock block used only in DDR configurations to trigger reads of the PDM data. More... | |
Collection of resources IDs required for PDM capture.
This struct is a container for the IDs of the xCore hardware resources used by the mic array unit's PdmRx component for capturing PDM data from a port.
An object of this type will be used for initializing and starting the mic array unit.
| clock_t pdm_rx_resources_t::clock_a |
ID of the clock block used to derive the PDM clock from the master audio clock.
In SDR configurations this is also the PDM data capture clock.
| clock_t pdm_rx_resources_t::clock_b |
ID of the clock block used only in DDR configurations to trigger reads of the PDM data.
If operating in an SDR configuration, clock_b must be 0. A value of 0 is what indicates an SDR configuration is being used.
| port_t pdm_rx_resources_t::p_mclk |
ID of the 1-bit port on which the master audio clock signal is received.
The master audio clock will be divided to produce the PDM sample clock.
This port will be configured as an input.
| port_t pdm_rx_resources_t::p_pdm_clk |
ID of the 1-bit port through which the PDM sample clock is signaled.
The PDM sample clock is used by the PDM microphones to trigger sample conversion.
This port will be configured as an output.
| port_t pdm_rx_resources_t::p_pdm_mics |
ID of the port on which PDM samples are received.
In an SDR configuration, the number of microphone channels is the width of this port. In a DDR configuration, the number of microphone channels is twice the width of this port.
This port will be configured as an input.
1.9.1