Nathan Yonkee / MPR121

use mbed os

Dependents:   Seeed_Grove_I2C_Touch_Example

Fork of MPR121 by Sam Grove

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MPR121 Class Reference
Public Member Functions

MPR121 Class Reference

Using the Sparkfun SEN-10250 BoB. More...

#include <MPR121.h>

Public Member Functions

 MPR121 (I2C &i2c)
 Create the MPR121 object.
bool isPressed (void)
 Determine if a new button press event occured Upon calling the state is cleared until another press is detected.
uint16_t buttonPressed (void)
 Get the electrode status (ELE12 ...

Detailed Description

Using the Sparkfun SEN-10250 BoB.

Example: 

  #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();
      
      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;
          }            
      }
  }

API for the MPR121 capacitive touch IC

Definition at line 76 of file MPR121.h.

Constructor & Destructor Documentation

MPR121 ( I2C &  i2c )

Create the MPR121 object.

Parameters:
i2c- A defined I2C object
i2c_addr- Connection of the address line

Definition at line 28 of file MPR121.cpp.

Member Function Documentation

uint16_t buttonPressed ( void   )

Get the electrode status (ELE12 ...

ELE0 -> b15 xxx b11 ... b0 The buttons are bit mapped. ELE0 = b0 ... ELE11 = b11 b12 ... b15 undefined

Returns:
The state of all buttons

Definition at line 39 of file MPR121.cpp.

bool isPressed ( void   )

Determine if a new button press event occured Upon calling the state is cleared until another press is detected.

Returns:
1 if a press has been detected since the last call, 0 otherwise

Definition at line 34 of file MPR121.cpp.

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