Hey Folks,
In this tutorial, we will learn, how to change the colour of RGB LED using accelerometer of the ARM (FRDM-KL25Z).
INTRODUCTION
- The FRDM-KL25Z is an ultra-low-cost development platform for Kinetis L Series KL1x (KL14/15) and KL2x (KL24/25) MCUs built on ARM® Cortex™-M0+ processor.
- The FRDM-KL25Z has been designed by NXP in collaboration with mbed for prototyping all sorts of devices, especially those requiring the size and price point offered by Cortex-M0+ and the power of USB Host and Device.
- The FRDM-KL25Z is supported by a range of NXP and third-party development software.
- It is packaged as a development board with connectors to break out to stripboard and breadboard and includes a built-in USB FLASH programmer.
FEATURES
- NXP KL25Z Kinetis KL2x MCU (MKL25Z128VLK4)
- High-performance ARM® Cortex™-M0+ Core
- 48MHz, 16KB RAM, 128KB FLASH
- USB (Host/Device)
- SPI (2)
- I2C (2)
- UART (3)
- PWM (TPM)
- ADC (16 bit)
- DAC (1x 12bit)
- Touch Sensor
- GPIO (66)
So now we are familiar with the FRDM-KL25Z let’s use it.
Components Required:
- FRDM-KL25Z board
- Data Cable (USB Mini-B)
- MMA8451Q - 3-axis accelerometer (On Board)
Code:
#include "mbed.h"
#include "MMA8451Q.h"
#if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
PinName const SDA = PTE25;
PinName const SCL = PTE24;
#elif defined (TARGET_KL05Z)
PinName const SDA = PTB4;
PinName const SCL = PTB3;
#elif defined (TARGET_K20D50M)
PinName const SDA = PTB1;
PinName const SCL = PTB0;
#else
#error TARGET NOT DEFINED
#endif
#define MMA8451_I2C_ADDRESS (0x1d<<1)
int main(void)
{
MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
PwmOut rled(LED1);
PwmOut gled(LED2);
PwmOut bled(LED3);
printf("MMA8451 ID: %d\n", acc.getWhoAmI());
while (true) {
float x, y, z;
x = abs(acc.getAccX());
y = abs(acc.getAccY());
z = abs(acc.getAccZ());
rled = 1.0f - x;
gled = 1.0f - y;
bled = 1.0f - z;
wait (0.1f);
printf("X: %1.2f, Y: %1.2f, Z: %1.2f\n", x, y, z);
}
}
After dumping the code the output is shown in the video below:-
Thinking?
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