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# 1 Harmony 3 Driver and System Service Application Examples for SAM L22 Family

The following applications are provided to demonstrate the typical or interesting usage models of one or more drivers, system services and RTOS.

Name | Description
--- | ---
Console Debug System Service using UART | This example application demonstrates the UART based console and debug system service
Console Debug System Service using USB | This example application demonstrates the USB based console and debug system service
FAT Filesystem using NVM Media | This application shows an example of implementing a FAT disk in the device internal Flash memory
FAT Filesystem using SD Card Media | This application shows an example of using the MPLAB Harmony File System to access and modify the contents of a SD card using the SDSPI driver and the SPI PLIB
FreeRTOS Basic | This example application demonstrates context switching between four tasks of different priorities. Two tasks run periodically while the other two tasks are event driven
I2C Driver Asynchronous - Multi Client | This example application demonstrates the multi-client feature of the asynchronous mode of the I2C driver by communicating with an external EEPROM and a temperature sensor
SPI Driver Asynchronous - Multi Instance | This example application demonstrates the multi instance feature of the asynchronous mode of the SPI driver by reading and writing to two EEPROMs connected to two different SPI bus
Time System Service Multi-client | This example application demonstrates the multi-client system timer functionality
USART Driver Asynchronous - USART Echo | This example application demonstrates the asynchronous mode of the USART driver by echoing the received characters