The PIT project is a simple demonstration program of the SDK PIT driver. It sets up the PIThardware block to trigger a periodic interrupt after every 1 second. When the PIT interrupt is triggereda message a printed on the UART terminal and an LED is toggled on the board.

The Power manager demo application demonstrates the use of power modes in the KSDK. The demo use the notification mechanismand prints the power mode menu through the debug console, where the user can set the MCU to a specific power mode. The usercan also set the wakeup source by following the debug console prompts. The purpose of this demo is to demonstrate theimplementation of a power mode manager. The callback can be registered to the framework. If a power mode transition happens,the callback will be called and user can do something. Tips: This demo is to show how the various power mode can switch to each other. However, in actual low power use case, to save energy and reduce the consumption even more, many things can be done including: - Disable the clock for unnecessary module during low power mode. That means, programmer can disable the clocks before entering the low power mode and re-enable them after exiting the low power mode when necessary. - Disable the function for unnecessary part of a module when other part would keep working in low power mode. At the most time, more powerful function means more power consumption. For example, disable the digital function for the unnecessary pin mux, and so on. - Set the proper pin state (direction and logic level) according to the actual application hardware. Otherwise, the pin cirrent would be activied unexpectedly waste some energy. - Other low power consideration based on the actual application hardware.

The Power mode switch demo application demonstrates the use of power modes in the KSDK. The demo prints the power mode menuthrough the debug console, where the user can set the MCU to a specific power mode. The user can also set the wakeupsource by following the debug console prompts. The purpose of this demo is to show how to switch between different power modes, and how to configure a wakeup source and wakeup the MCU from low power modes. Tips: This demo is to show how the various power mode can switch to each other. However, in actual low power use case, to save energy and reduce the consumption even more, many things can be done including: - Disable the clock for unnecessary module during low power mode. That means, programmer can disable the clocks before entering the low power mode and re-enable them after exiting the low power mode when necessary. - Disable the function for unnecessary part of a module when other part would keep working in low power mode. At the most time, more powerful function means more power consumption. For example, disable the digital function for the unnecessary pin mux, and so on. - Set the proper pin state (direction and logic level) according to the actual application hardware. Otherwise, the pin cirrent would be activied unexpectedly waste some energy. - Other low power consideration based on the actual application hardware. - Debug pins(e.g SWD_DIO) would consume addtional power, had better to disable related pins or disconnect them.

The RTC project is a simple demonstration program of the SDK RTC driver. It sets up the RTChardware block to trigger an alarm after a user specified time period. The test will set the currentdate and time to a predefined value. The alarm will be set with reference to this predefined dateand time.

The RTC demo application demonstrates the important features of the RTC Module by using the RTC Peripheral Driver.The RTC demo supports the following features:- Calendar + Get the current date time with Year, Month, Day, Hour, Minute, and Second. + Set the current date time with Year, Month, Day, Hour, Minute, and Second.- Alarm + Set the alarm based on the current time. + Application prints a notification when the alarm expires.- Seconds interrupt + Use second interrupt function to display a digital time blink every second.

sai_dma_record_playback

The sai_dma_transfer example shows how to use sai driver with DMA:In this example, one sai instance playbacks the audio data stored in flash/SRAM.

The sai_interrupt example shows how to use sai fucntional API to implement interrupt playback:In this example, one sai instance playbacks the audio data stored in flash/SRAM using interrupt.

sai_interrupt_record_playback

The sai_interrupt_transfer example shows how to use sai driver with interrupt:In this example, one sai instance playbacks the audio data stored in flash/SRAM using interrupt.