Led blink CC2540

Yes, you can use osal_start_timerEx to create a periodic event which is triggered every 5 seconds to toggle LED. Another alternative is to use API HalLedBlink to do this.

can you gimme some example >.< like how to set because I still cannot do that ... so sad....

You wan to use HalLedBlink or osal_start_timerEx.

the osal_timer =)

You can refer to SBP_START_DEVICE_EVT implementation in simpleBLEPeripheral example of BLE Stack v1.4.2.

Hi Yikai, now I have a problem. How can I control LED blinking only in one event? any tips? Below is my coding:

osal_start_timerEx( keyfobapp_TaskID, LED_ON, LED_DELAY );

if ( events & LED_ON )
{
led_on();
osal_start_timerEx( keyfobapp_TaskID, LED_OFF, LED_DELAY );

return ( events ^ LED_ON );
}

if ( events & LED_OFF )
{
led_off();
osal_start_timerEx( keyfobapp_TaskID, LED_ON, LED_DELAY );
return ( events ^ LED_OFF );

My teacher told me to put all the events inside only one event using bitwise operator BUT I have no idea how it done, any tips or advise? Thanks. This is the brief idea:

if ( events & LED_BLINK )
{
led on;
set a timer to off the led after N seconds but the led shall remain on till N seconds to off;
led off;
set a timer to on the led after N seconds but the led shall remain off till N seconds to on;
}

You can use a global variable to keep the LED on/off status and toggle it according to this global variable in LED_BLINK event.

what about the timer? I only need to set the timer for the led blink events itself?

Yes, you should set the timer for the led blink events itself.

Okay, I will try it first, thanks for your reply.

You are welcome.

>.< I have a problem to toggle the LED, gg.... How to toggle it?

It works like

If (LED is ON)
{
turn off LED;
} else {
turn on LED;
}

>.< Oh gosh, I still cannot make it....

Can you show me how you do it?

Well, my teacher just told me something or maybe I will do it first. Sorry for disturbing >.<

No problem.

My code is like this for the toggle LED.....
void led_toggle( uint8 mode, uint8 pin )
{
P1SEL = 0x00;
P1DIR = 0x03;
switch ( mode )
{
case ON:
P1 |= ( 1 << pin );
break;

case OFF:
P1 &= ~( 1 << pin );
break;

default:
break;
}

}

i set ON OFF 1 and 0 . Below is my blinking code: (but it didn't work ~.~)

osal_start_timerEx( keyfobapp_TaskID, LED_BLINK, LED_DELAY );

if ( events & LED_BLINK )
{
led_toggle( ON, ( LED_RED_PIN | LED_BLUE_PIN ) );
osal_start_timerEx( keyfobapp_TaskID, LED_BLINK, LED_DELAY );
led_toggle( OFF, ( LED_RED_PIN | LED_BLUE_PIN ) );
return ( events & LED_BLINK );
}

You call led_toggle( ON, ( LED_RED_PIN | LED_BLUE_PIN ) ) and led_toggle( OFF, ( LED_RED_PIN | LED_BLUE_PIN ) ) in your event so it will always be turned off.

So, I shouldn't put the led off function?

I have show you pseudo code in previous post. You should check LED status in blinking event and do on/off accordingly.

okay, now my coding is like this
void led_toggle( uint8 pin )
{
P1SEL = 0x00;
P1DIR = 0x03;
if turn on, then off;
if on, then on;
}
but what should I put, like the code below?? Give me advise and show me where is my mistake.
void led_toggle( uint8 pin )
{
P1SEL = 0x00;
P1DIR = 0x03;
if ( P1 == 1 )
{
P1 &= ~pin;
}
else
{
P1 |= ~pin;
}

Which pin do you use to turn on/off LED?

pin 0 and 1 = 0x01 and 0x02 .. Please help me T.T

Thanks!!!! I try to digest first =)

You are welcome.

well, it is not working >.<

What do you mean it doesn't work?

Well, it didn't blink as I expected but maybe I need to check back. It is possible to do ON and OFF using one function and bitwise operator?? actually my teacher told me to declare a function for led toggle using bitwise operator, any tips or advises would be appreciate and sorry for any inconvenience that I caused >.< .

I think you can wrap my example code into a function.

Okay, I will try it . But izzit possible to do LED on and off using only one statement ? For example,
void toggle()
{
//initiate port 1 pin 0 and pin 1 to output w/o affecting other pin
//statement that make LED ON or OFF
}

osal_start_timerEx( keyfobapp_TaskID, LED_BLINK, 500 );

if ( events & LED_BLINK )
{
//led will on first and set the timer to 5 seconds then LED will off
}

Well, my problem is I stuck in the event.... I dunno how to OFF the LED using just one event >.<
I used two events to go ON and OFF before but now I want to make it one events to do the blinking~
Any advises or tips?

sorry for late reply, I will try it. Thanks

You are welcome.

one more thing, the led status first is 0 . When it go to the function , the status will be overwrite again and again? When 0 then overwrite to 1 , when 1 then will overwrite to 0 and repeat , right?

Yes, that's.

Sorry Yk, but it didn't work. The status didn't overwrite and it is not blinking =(

toggle(&led_status);
What is the function for & in the toggle(&led_status) ??

It's pointer in C/C++ language. You can refer to www.tutorialspoint.com/.../c_pointers.htm

YK thanks for your help, finally it work!! Thanks for your effort =) and sorry for my noobness

You are welcome.