LPC2148 – FreeRTOS Porting with Keil IDE

Last Updated on: June 29th, 2022

This article is a Series on FreeRTOS tutorials and carries the discussion on FreeRTOS and its usage. The aim of this series is to provide easy and practical examples that anyone can understand. Today we are going to see FreeRTOS Porting for LPC2148 Using Keil.

You can also read the RTOS Basic concepts and Advanced concepts.

Requirement

1. Keil IDE for ARM             –    Download Here
2. FreeRTOS Exe File           –   Download Here
3. FreeRTOSConfig.h          –    Download Here
4. Startup.s                         –    Download Here

FreeRTOS Porting for LPC2148 Using Keil

I assumed that you already installed Keil IDE for ARM and you know how to create a project in that. If you don’t know please See here. Now we will start. 

Initial Steps(Installing Time)

NOTE: These two steps are required for the First time (Installation time). Not required for each time project creating.

1. Extract the FreeRTOS exe to C:\Keil

2. Then paste the FreeRTOSConfig.h file in include folder of source in FreeRTOS

Again I’m reiterating these two steps only for Installation time. No need to copy every time.

Create the project(Each time):

1. Open keil4uvision and create a new project. If you don’t know how to create a project Please go through it Here.

2. click Project and Options for Target ‘Target 1’.

3.  Click C/C++

4. Click on Define and type the context below.

ARM7_LPC21xx_KEIL_RVDS KEIL_THUMB_INTERWORK

5. Then in Include paths, add paths as like below.

1. C:\Keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Demo\Common\include
2. C:\Keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Source\portable\RVDS\ARM7_LPC21xx
3. C:\Keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Source\include
4. . ( add this path as the dot in include path which indicates the current directory)

6. Then click Asm then paste below the line in include paths.

C:\Keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Source\portable\RVDS\ARM7_LPC21xx

7. Then add the following files to the project from C:\Keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Source

1. Task.c
2. List.c
3. Queue.c

8. Then add the following files to the project from  C:\keil\FreeRTOS_V9.0.0rc2\FreeRTOS\Source\portable\RVDS\ARM7_LPC21xx

1. Port.c
2. portASM.S (this file appears only when we select all files in file type).

9.  Then add following file from C:\keil\FreeRTOS\FreeRTOS_V9.0.0rc2\FreeRtos\portable\memmang

1. heap_2.c

10. Final step. Copy the whole content in the downloaded startup.s file and paste it into the startup file which is attached to the project.

The thing is you should do this every time you are creating a new project. when you are doing a lot of projects you will be fed up with this. But what to do? We have to do this.

You can also read the below tutorials.

Linux Device Driver Tutorials	C Programming Tutorials
FreeRTOS Tutorials	NuttX RTOS Tutorials
RTX RTOS Tutorials	Interrupts Basics
I2C Protocol – Part 1 (Basics)	I2C Protocol – Part 2 (Advanced Topics)
STM32 Tutorials	LPC2148 (ARM7) Tutorials
PIC16F877A Tutorials	8051 Tutorials
Unit Testing in C Tutorials	ESP32-IDF Tutorials
Raspberry Pi Tutorials	Embedded Interview Topics
Reset Sequence in ARM Cortex-M4	BLE Basics
VIC and NVIC in ARM	SPI – Serial Peripheral Interface Protocol
STM32F7 Bootloader Tutorials	Raspberry PI Pico Tutorials
STM32F103 Bootloader Tutorials	RT-Thread RTOS Tutorials
Zephyr RTOS Tutorials - STM32	Zephyr RTOS Tutorials - ESP32
VHDL Tutorials	UDS Protocol Tutorials
Product Reviews	STM32 MikroC Bootloader Tutorial