ez430-F2013 PWM LED Test

Two LEDs fade in and out. The C code uses loops within loops to create a pulse with a set frequency and cycling duty cycle.

The ez430 dongle had been cut to expose the headers that I soldered to the target board.

Simple stuff, but you have to start somewhere.

Here is the code that I wrote and debugged with CCS4, feel free to pick holes in it:

#include "msp430f2101.h"

int main(void)
{
WDTCTL = WDTPW + WDTHOLD;
P1DIR |= 0x02;
P1DIR |= 0x04;

for (;;)
{ volatile unsigned int i; volatile unsigned int n; n = 256; do{ n = n - 4; P1OUT = 0x00; i = 256; do{ i--; if (i - n){ P1OUT = 0x02; } else { P1OUT = 0x04; } } while (i != 0); } while (n != 0); do{ n = n + 4; P1OUT = 0x00; i = 256; do{ i--; if (i - n){ P1OUT = 0x02; } else { P1OUT = 0x04; } } while (i != 0); } while (n != 256);

}
}

Category:

Education

Tags:

• ez430
• F2013
• MCP430
• TI
• PWM
• LED
• CCS
• Hacking
• Microcontroller
• Microchip

[roringar]

good effort! keep it up!!