Driver Porting Layer (DPL) Hello World

Table of Contents

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

Introduction

This example shows a simple application, which setups the CPU and the underlying RTOS or no-RTOS environment on the supported SOC.

The example does the below

• Setup a timer with system tick of 1ms, setup MPU and cache (if available)
• Create a RTOS task (in RTOS example)
• Trigger a ISR and signal a semaphore from ISR to main task
• Show usage of clock delay
• Show usage of cache APIs
• Show usage of heap APIs

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
	r5fss0-0 freertos
	m4fss0-0 nortos
	m4fss0-0 freertos
Toolchain	ti-arm-clang
Board	am64x-evm
Example folder	examples/kernel/dpl/hello_world/

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

See Also

Driver Porting Layer (DPL)

Sample Output

Shown below is a sample output when the application is run,

[HWI] Hwi post ...
[HWI] Hwi post ... DONE !!!
[CLOCK] Sleep at time 2611 us ...
[CLOCK] Wakeup at time 103441 us ... DONE !!!
[CACHE] Running cache operations ...
[CACHE] Running cache operations ... DONE !!!
[HEAP] Free size = 1984 bytes
[HEAP] Allocated 1023 bytes @ 0x7000ec80, free size = 896 bytes
[HEAP] Allocated 511 bytes @ 0x7000f0c0, free size = 320 bytes
[HEAP] Free'ed 1023 bytes @ 0x7000ec80, free size = 1408 bytes
[HEAP] Allocated 121 bytes @ 0x7000ec80, free size = 1216 bytes
[HEAP] Free'ed 511 bytes @ 0x7000f0c0, free size = 1792 bytes
[HEAP] Free'ed 121 bytes @ 0x7000ec80, free size = 1984 bytes
All tests have passed!!