Cypress CE225786, Manual

Page: 4 / 10

PSoC 6 MCU: USB Audio Recorder
www.cypress.com
Document Number: 002-25786 Rev. ** 4
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usb_comm.c/h files contain all macros and functions related to the USBFS and USB Audio Device Class.
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uart_debug.c/h and stdio_user.c/h files are used for retargeting I/O functions such as printf via UART to a terminal emulation
program.
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FreeRTOSConfig.h contains the FreeRTOS settings and configuration. Non-default settings are marked with inline
comments. For details of FreeRTOS configuration options, see the FreeRTOS customization webpage.
Resources and Settings
Table 1 lists the ModusToolbox resources used in this example, and how they are used in the design. For pin usage and
configuration, open the Pins tab of the design.modus file.
Table 1: ModusToolbox Resources
Resource Alias Purpose
PDM/PCM KIT_PDM Connects to the digital microphones.
UART (SCB) KIT_UART Debug interface.
USBFS USBFS Implements the Audio Device Class.
DMA DataWire DMA_PCM
Transfers data from PDM/PCM FIFO
to SRAM.
Figure 5 shows the configuration settings for KIT_PDM.
Figure 4. KIT_PDM Configuration
Figure 5 shows the configuration settings for the USBFS block. To visualize the USBFS descriptor, click in the Launch USB
Configuration button from Figure 5. You can also refer to the cycfg_usbdev.h file in the Generated Source folder.