In this tutorial, we will learn, how to change the intensity of light using touch sensor 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)
- Capacitive touch “slider”(On Board)
Code:
#include "mbed.h"
#include "tsi_sensor.h"
/* This defines will be replaced by Pin Names soon */
#if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
#define ELEC0 9
#define ELEC1 10
#elif defined (TARGET_KL05Z)
#define ELEC0 9
#define ELEC1 8
#else
#error TARGET NOT DEFINED
#endif
int main(void) {
PwmOut led(LED_GREEN);
TSIAnalogSlider tsi(ELEC0, ELEC1, 40);
while (true) {
led = 1.0 - tsi.readPercentage();
wait(0.1);
}
}
After dumping the code the output is shown in the video below:-
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