AN213924 datasheet(21/74 Pages) INFINEON

21 / 74 page

Document Number: 002-30703 Rev. *F

Page 20 of 73

PSoC 6 MCU: CY8C61x5 Datasheet

Figure 18 shows the high-level software overview. Cypress

provides middleware libraries for CapSense, ADC, and IDAC on

GitHub to enable quick integration. The Board Support Package

for any kit with CapSense capabilities automatically includes the

CapSense library in any application that uses the BSP.

User applications interact only with middleware to implement

functions of the CSD block. The middleware interacts with

underlying drivers to access hardware as necessary. The CSD

driver facilitates time-multiplexing of the CSD hardware if more

than one piece of CSD-related middleware is present in a project.

It prevents access conflicts in this case.

ModusToolbox Software provides a CapSense configurator to

enable fast library configuration. It also provides a tuner for

performance evaluation and real-time tuning of the system. The

tuner requires an EZI2C communication interface in the

application to enable real-time tuning capability. The tuner can

update configuration parameters directly in the device as well as

in the configurator.

CapSense and ADC middleware use the CSD interrupt to

implement non-blocking sensing and A-to-D conversion.

Therefore, interrupt service routines are a defined part of the

middleware, which must be initialized by the application.

Middleware and drivers can operate on either CPU. Cypress

recommends using the middleware only in one CPU. If both

CPUs must access the CSD driver, memory access should be

managed in the application.

Refer to AN85951: PSoC 4 and PSoC 6 MCU CapSense Design

Guide for more details on CSX sensing, CSD sensing, shield

electrode usage and its benefits, and capacitive system design

guidelines.

Refer to the API reference guides for CapSense, ADC, and IDAC

available on GitHub.

Figure 8. CapSense Software/Firmware Subsystem

Tuner

CSD Driver

GPIO / Clock

Drivers

CSD Block

GPIOs / Clock

SCB

SCB Driver

(EZI2C)

Configuration

Hardware and Drivers

Middleware

Software

Application Program

AN213924 Datasheet(PDF) 21 Page - Infineon Technologies AG

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