How to create new project on LPCXpresso for OM13077[Creating new project on GPIO button polling method and turning on/off LED]

bheemarao

10 Jun 2016

This blog is in continuation to my earlier blog on out of box on OM13077OM13077 LPCXpresso board

Introduction to OM13077 Dual processor cores NXP LPCXpresso development board and demonstrating the existing project using LPCXpresso tool [Importing the example project and executing on NXP LPC54102 board]

Here I am creating new project for demonstrating GPIO button based on polling the input switch and glowing the user led. If button is pressed then blue led is turned on continuously and if released the led will turn off

The LPCXpresso54102 board includes the following features:

Dual processor cores: ARM Cortex-M4 and ARM Cortex-M0+. The M0+ core runs at the same frequency as the M4 core. Both cores operate up to a maximum frequency of 100 MHz.
On-board high-speed USB based debug probe with CMSIS-DAP and LPCXpresso IDE Redlink protocol options, can debug on-board LPC54102 or external target
Support for external debug probes
Tri-color LED
Target Reset, ISP and WAKE buttons
Expansion options based on Arduino UNO and Pmod, plus additional expansion port pins
On-board 1.8/3.3V or external power supply options
Built-in MCU power consumption and supply voltage measurement
UART, I2C and SPI port bridging from LPC54102 target to usb via the on-board debug probe
FTDI UART connector

The board contains the new LPC54102 ultra-low-power dual core ARM Cortex-M4F/M0+microcontroller targetted at always on-sensor processing applications that can run up to 100MHz each core.

The main idea is to use the cortex-M0+ core for sensor listening data collection and aggregation, and then wake up periodically the cortex-M4F to perform complex data processing tasks.

To proceed further the below are the prerequisites:

1. Installed LPCXpresso IDE tool chain or you can download it from below link:

https://www.lpcware.com/lpcxpresso/download

2. LPCOpen examples and libraries:

http://cache.nxp.com/files/microcontrollers/software/LPCWare/lpc5410x_lpcxpresso_54102_lpcxpresso_3.01a.000_11.zip

C:\nxp\LPCXpresso_8.1.4_606\lpcxpresso\Examples\LPCOpen

3. LPCXpresso 54102 development board hardware OM13077OM13077

Open LPCXpress and select the workspace as shown below:

Select on New project option under quick start panel as shown below:

Next select the LPC54100 family and select LPC5410x (M0+) > LPCOpen- C Project as shown below:

Next select the project name

“GPIO-polling”

Next select the device:

Now we need to select an LPCOpen Chip library project within the current workspace

As this is the new workspace we need to import the library into working directory

Now select the examples archive file to import.

Browse the LPCXpresso installed location

“C:\nxp\LPCXpresso_8.1.4_606\lpcxpresso\Examples\LPCOpen” and select the zip file “lpc5410x_lpcxpresso_54102_lpcxpresso_3.01a.zip” which is our target board

Then select “lpc_chip_5410x_m0” as chip library for cortex-M0+ core and

LPC board library as “lpc_board_lpcxpresso_54102_m0” as shown below:

Now you will be able to pop down the LPCOpen Libraries as shown below

Now repeat the same for LPCOpen Board Library as shown

CMSIS DSP Library Project Selection is optional so we proceed further by clicking Next

Next in Memory Configuration Editor select default flash driver

Next in printf option page let it be as default and click “finish”

Now our project folder looks as shown below:

It has Board library and Chip library included in the project as shown

Now we will start to perform our task i.e implement polling based button sensing, if button is pressed then LED-Blue is turned on and if we release the button then Blue led is turned off

The hardware switch connection of the board is as shown below:

And the LED part is connected as shown below:

i.e SW-1 connected to Port-0-24 pin

And Blue LED is connected to Port-0-31 port pin

LED’s are defined in the file ”board.c”

ledBits[] = {29, 30, 31};

i.e RED LED connected to Port-0-29 Green to Port-0-30 and Blue to Port-0-31

Below is our code written in GPIO-polling.c file

int main(void) {

          SystemCoreClockUpdate();
                   Board_Init();
                       Board_LED_Set(0, false); //red led turned off
                             Board_LED_Set(1, false); //Green led turned off
                             Board_LED_Set(2, false); //Blue led turned off
                   Chip_GPIO_SetPinDIRInput(LPC_GPIO, 0, 24);

    // TODO: insert code here

                   while (1) {
                                      //__WFI();
                             if(Chip_GPIO_ReadPortBit(LPC_GPIO, 0, 24)== 0){
                                                Board_LED_Set(2, true);// turn on led
                                      }
                                      else
                                                Board_LED_Set(2, false); // turn off
                             }

    return 0 ;
}

Save the file and click on build button as shown above

You can see our project builds successfully as shown below

At this point of time we have two options in executing the project either by going to Flashing the builded binary file or selecting the debug option and execute it.