UART Echo Low Latency Polling

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example demonstrate the UART low latency API in polling mode. This example receives 8 characters and echos back the same. The application ends when the user types 8 characters. Initially the application sets a buffer to receive data.

In the main context, the application checks any data from the UART FIFO and if so, write to the RX buffer and sets the RX buffer count. Application then copies the data to TX buffer and initiate the UART TX (echo).

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
Toolchain	ti-arm-clang
Boards	am263x-cc, am263x-lp
Example folder	examples/drivers/uart/uart_echo_low_latency_polling

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
• Please select the UART port used for console as mentioned in Setup UART Terminal

See Also

UART

Sample Output

Shown below is a sample output when the application is run, Please note that application prints in both CCS and UART console. In UART console you need to type 8 characters.

CCS Console:

[UART] Echo Low Latency polling mode example started ...
All tests have passed!!

UART Console:

This is uart low latency test in polling mode, Receives 8 characters then echo's back and exits..
12345678
All tests have passed!!