Test program for capacitive sensing using the Freescale MPR121 on the Sparkfun SEN-10250 BoB
Fork of MPR121_HelloWorld by
Hello World program that prints the bit mapped value of the electrode that is detected to the console. Also lights a LED when a press or no press state is detected.
Hardware tested:
https://www.sparkfun.com/products/10250
Platforms tested:
Information
Must add pull-ups to the I2C bus!!
LED indication for LPC1768 & LPC11U24 are opposite of KL25Z. See schematics for details :)
main.cpp
- Committer:
- sam_grove
- Date:
- 2013-08-27
- Revision:
- 1:684222fa16bb
- Parent:
- 0:6f4bcfe86ac2
- Child:
- 2:a37fbc835511
File content as of revision 1:684222fa16bb:
#include "mbed.h" #include "MPR121.h" Serial pc(USBTX, USBRX); DigitalOut myled(LED1); #if defined TARGET_LPC1768 || TARGET_LPC11U24 I2C i2c(p28, p27); InterruptIn irq(p26); MPR121 touch_pad(i2c, irq, MPR121::ADDR_VSS); #elif defined TARGET_KL25Z I2C i2c(PTC9, PTC8); InterruptIn irq(PTA5); MPR121 touch_pad(i2c, irq, MPR121::ADDR_VSS); #else #error TARGET NOT TESTED #endif int main() { touch_pad.init(); touch_pad.enable(); touch_pad.registerDump(pc); while(1) { if(touch_pad.isPressed()) { uint16_t button_val = touch_pad.buttonPressed(); printf("button = 0x%04x\n", button_val); myled = (button_val>0) ? 1 : 0; } } }