Introduction to lighting the MSP430

/***************************************************
Program function: Control 8 LED flashing, control the flow of light and flow rate
---------------------------------------------------
***************************************************/
#include <msp430x14x.h>

/* Close all IO ports below */
#define CLOSE_IO p1dir = 0XFF; P1out = 0XFF; P2dir = 0XFF; P2out = 0XFF; P3dir = 0XFF; P3out = 0XFF; P4dir = 0XFF; P4out = 0XFF; P5dir = 0XFF;    P5out = 0XFF; P6dir = 0XFF; P6out = 0XFF;

typedef unsigned int uint;

UINT i = 0,j = 0,dir = 0;
UINT flag = 0,speed = 0; flag--light flow mode, speed--light flow speed

/**************** Main function ****************/
void Main (void)
{
void P_setting ();
Close_io;
P_setting ();
_eint (); Enable global interrupt
LPM0; CPU enters LPM0 mode
}
/* Package the settings */
void p_setting (void) {

Wdtctl = Wdtpw + wdthold; Turn off the watchdog
P6dir |= BIT2;    P6out |= BIT2; Turn off level translation
P5out &= ~bit7;
CCTL0 = CCIE; Enable CCR0 Interrupt
CCR0 = 50000;

Tactl = tassel_2 + id_3 + mc_1; Timer A's clock source select SMCLK, Count mode
P2dir = 0xFF; Set P2 port direction to output
P2out = 0xFF;

}

/*******************************************
Function Name: timer_a
Function: Timer A's interrupt service function, which passes the flag here
Control flow direction and flow speed of running water lamp
********************************************/

#pragma vector = Timera0_vector
__interrupt void timer_a (void)
{
if (flag = = 0)
{
P2out = ~ (0x80>> (i++)); Light-lit sequence D8-D1
}
else if (flag = = 1)
{
P2out = ~ (0x01<< (i++)); Light-lit sequence D1-D8
}
Else
{
if (dir)//light order D8, D1,D1, D8, round-robin
{
P2out = ~ (0x80>> (i++));
}
Else
{
P2out = ~ (0x01<< (i++));
}
}

if (i = = 8)
{
i = 0;
dir = ~dir;
}

j + +;
if (j = = 40)
{
i = 0;
j = 0;
flag++;
if (flag = = 4) flag = 0;
Switch (speed)
{
Case 0:
Tactl &=~ (ID0 + ID1); Increment count mode
Tactl |= id_3; 8 frequency
Break
Case 1:
Tactl &=~ (ID0 + ID1);
Tactl |= id_2; 4 frequency
Break
Case 2:
Tactl &=~ (ID0 + ID1);
Tactl |= id_1; 2 frequency
Break
Case 3:
Tactl &=~ (ID0 + ID1);
Tactl |= Id_0; 1 frequency
Break
Default
Break
}
if (flag! = 3) speed++;
if (speed = = 4) Speed = 0;
}
}

"Tested for f149 series"

Introduction to lighting the MSP430