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# 1 Harmony 3 Driver and System Service Application Examples for SAM C20/C21 Family

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

Name | Description
--- | ---
Console Debug System Service using UART | This example application demonstrates the UART based console and debug system service
EEPROM Emulator Library Read Write | This application example demonstrates how to read and write to the Emulated EEPROM memory space using the EEPROM Emulator library
FAT File System using NVM and SD Card Media | This application shows an example of using the FAT File System to access files across multiple media (NVM, SD Card)
FAT File System using NVM Media | This application shows an example of implementing a FAT disk in the device internal Flash memory
FAT File System 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
FreeRTOS Task Notification | This example application is to illustrate the FreeRTOS Task Notification feature which is used as a light weight binary semaphore
I2C Driver Asynchronous - I2C EEPROM | This example application shows how to use the I2C driver in asynchronous mode to perform operations on the EEPROM
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
I2C Driver Synchronous - I2C EEPROM | This example application shows how to use the I2C driver in synchronous mode to perform operations on the EEPROM
I2C Driver Synchronous - Multi Client | This example application demonstrates the multi-client feature of the synchronous mode of the I2C driver by communicating with an external EEPROM and a temperature sensor
I2C EEPROM AT24 Driver - EEPROM Read Write | This example application shows how to use the AT24 driver to perform read and write operations on AT24 series of EEPROM
MPFS Filesystem using NVM Media | This application shows an example of implementing a MPFS disk in device Internal Flash memory
SDSPI Driver Synchronous - SDSPI Read Write | This example application shows how to use the SDSPI driver in synchronous mode to perform block operations on the SD Card Media
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
SPI Driver Asynchronous - Self Loopback Multi Client | This example demonstrates how to use the SPI driver in asynchronous mode to achieve self-loop back between multiple clients
SPI Driver Synchronous - Multi Instance | This example application demonstrates the multi instance feature of the synchronous mode of the SPI driver by reading and writing to two EEPROMs connected to two different SPI bus
SPI Driver Synchronous - Self Loopback Multi Client | This example demonstrates how to use the SPI driver in synchronous mode to achieve self-loop back between multiple clients in RTOS environment
SPI EEPROM AT25 Driver - EEPROM Read Write | This example application shows how to use the AT25 driver to perform read and write operations on AT25 series of EEPROM
Time System Service Multi-client | This example application demonstrates the multi-client system timer functionality
USART Driver Asynchronous - USART Echo | This example echoes the received characters over the console using the USART driver in asynchronous mode
USART Driver Asynchronous - USART Multi Instance | This example echoes the received characters over the two consoles using the USART driver in asynchronous mode
USART Driver Synchronous - USART Echo | This example echoes the received characters over the console using the USART driver in synchronous mode
USART Driver Synchronous - USART Multi Instance | This example echoes the received characters over the two consoles using the USART driver in synchronous mode