Multiple MSP430 Launchpad.

A simple example of four MSP430 Launchpads passing control to each other. (please don't mock my source code...)


// By Voltar. www.ironjungle.com June 2011
// Simple demonstration of multiple MSP430 Launchpads communicating
// with each other in a Master/Slave type relationship.

// All MSP430 are loaded with this exact same code.
// No limit to the number of MSP430 Launchpads.

// The Master Launchpad P1.0 (Red LED Output) is hardwired to
// P1.3 (S2 switch input) on the Slave Launchpad.

// The Master Lauchpad passes control to the adjacent Slave Launchpad.
// That Slave Launchpad then becomes a Master.


// Master MSP430
// -----------------
// | |
// | |
// | |
// | P1.6|---LED2
// | P1.0|---LED1 ------hardwired to P1.3 on the Slave MP430
// | |

#include msp430g2231.h

void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Calm the dog...
P1DIR |= BIT0; // Set P1.0 to output direction (Red LED)
// P1.0 low also triggers Slave MSP430 to run
P1DIR |= BIT6; // Set P1.6 to output direction (Green LED) volatile long i;

P1OUT = BIT0; // Start with RED on, Green off on all LPs

for (;;)
{

while ((P1IN & BIT3));
// Wait for button press on P1.3
// We also wired P1.3 (INPUT) to P1.0 (Red LED Output)
// for the Slave MSP430. A low P1.0 triggers the Slave.
for (i=0; i=500; i++);

// A little delay after the trigger
P1OUT ^= BIT0 + BIT6;
// TOGGLE the two LEDs for (i=0; i=100000; i++);
/// This brings P1.0 Low on the Master MSP430
//and triggers the Slave MSP430 via P1.3. P1OUT ^= BIT0 + BIT6;
// TOGGLE the two LEDs and wait for trigger. } //endless loop. The little MSP430 never gets bored.
} //main

Category:

Science & Technology

Tags:

• Texas
• Instruments
• MSP439
• Launchpad
• Master/Slave