MSP430 Launch pad Green LED (P1.6 ) blinking

[chandrumcs]

Hi Team,

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Code C - [expand]
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#include  <msp430g2231.h>
 
 unsigned int i = 0;                         // Initialize variables. This will keep count of how many cycles between LED toggles
 
 
void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer. This line of code is needed at the beginning of most MSP430 projects.
                                            // This line of code turns off the watchdog timer, which can reset the device after a certain period of time.
 
  P1DIR |= 0x01;                            // P1DIR is a register that configures the direction (DIR) of a port pin as an output or an input.
 
 
                                            // To set a specific pin as output or input, we write a '1' or '0' on the appropriate bit of the register.
 
 
                                            // P1DIR = <PIN7><PIN6><PIN5><PIN4><PIN3><PIN2><PIN1><PIN0>
 
 
                                            // Since we want to blink the on-board red LED, we want to set the direction of Port 1, Pin 0 (P1.0) as an output
 
                                            // We do that by writing a 1 on the PIN0 bit of the P1DIR register
                                            // P1DIR = <PIN7><PIN6><PIN5><PIN4><PIN3><PIN2><PIN1><PIN0>
                                            // P1DIR = 0000 0001
                                            // P1DIR = 0x01     <-- this is the hexadecimal conversion of 0000 0001
 
 
 
  for (;;)                                  // This empty for-loop will cause the lines of code within to loop infinitely
  {
 
 
 
    P1OUT ^= 0x01;                          // Toggle P1 using exclusive-OR operation (^=)
 
                                            // P1OUT is another register which holds the status of the LED.
                                            // '1' specifies that it's ON or HIGH, while '0' specifies that it's OFF or LOW
                                            // Since our LED is tied to P1.0, we will toggle the 0 bit of the P1OUT register
 
 
 
    for(i=0; i< 20000; i++);                // Delay between LED toggles. This for-loop will run until the condition is met.
                                            //In this case, it will loop until the variable i increments to 20000.
  }
}

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I used this for blinking RED LED P1.0. But I want to know how to glow the Green alone P1.6.

Please help


Regards,
Chandru

 

[pavans2510]

change
P1DIR |= 0x01;
to
P1DIR |= BIT6;

and

change
P1OUT ^= 0x01;
to
P1OUT ^= BIT6;

 

[chandrumcs]

Hi,

Thank you. Its working fine
Could you please tell why we should put bit6.

 

[doraemon]

Hello!
You should use P1OUT |= BIT6 (or P1OUT |= 0x40) because LED is on bit 6 of P1.
Dora.

 

[chandrumcs]

Hi Dora,

Thank you......

Chandru