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[SOLVED] MSP430G2 Launchpad Keypad Problem

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I tried to use my MSP430G2553 launchpad with a keypad (https://www.sparkfun.com/products/8653) using

#include <Keypad.h>

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
//byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
//byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad

byte rowPins[ROWS] = { P1_5, P1_4, P1_3, P1_2 };
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { P1_0, P1_7, P1_6 };   

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
void loop(){
  Serial.print("Serial test\n");
  char key = keypad.getKey();
  if (key != NO_KEY){

None of them works, they only print "Serial test" and thats when i press RESET. I tried using latest keypad library from ARDUINO site or the libraries that in those tutorials.


Do i need a different way to wire up the keypad to launchpad or need a different library?

Thank you. 

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Be careful which pins you use. P1_2 is the RX pin for Serial. Since you call Serial after you instantiate the Keypad things will get messed up and could be the reason why things don't work.


I also read through the Keypad code from http://www.pjrc.com/teensy/td_libs_Keypad.html and see nothing in this code that would not work on MSP430. Of course the devil is in the details but at first glance this should just work.


Try a different pin than P1_2. You can find the pin map for the MSP430G launchpad here: http://energia.nu/Guide_MSP430LaunchPad.html



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