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Sanjeev Kulkarni

pls help...

i'm working on LPC1114-FBD/301 series

On my board 4 LED's are connected to P0_8, P0_9, P0_10, P0_11.

I'v written a sample code toggle them. Only on 8 and 9 port pin LED's are blinking
but on 10 and 11 there state is always on. here is the sample code

/* by default P0_8 and P0_9 pins are GPIO's */ LED_DIR |= BIT(8); LED_DIR |= BIT(9);

/* 9th and 10th pins are not GPIO's on reset */ // i think here some changes required to make them as GPIO's IOCON_SWCLK_PIO0_10 |= 0x1; IOCON_R_PIO0_11 |= 0x1;

LED_DIR |= BIT(10); LED_DIR |= BIT(11);

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  • 0 in reply to Sanjeev Kulkarni

    if you don't have hardware debugging capabilities, you may want to simulate your code.

    i have no idea if your is right or not but the following may be more readable:

    #define LED_PORT GPIO0DATA //output data register where the leds are on
#define LED_DIR GPIO0DIR
#define BIT(n) (1<<n)
#define LEDs (BIT(8) | BIT(9) | BIT(10) | BIT(11)) //leds on pin8/9/10/11
#define LED_ON(leds) {LED_PORT |= (leds);}  //leds active on
#define LED_OFF(leds) {LED_PORT &=~(leds);}  //leds active off
#define LED_TOGGLE(leds) {LED_PORT ^= (leds);} //toggle leds

void delay(unsigned long dly )
{ while ( dly-- );
}

void main (void ) {

/* by default P0_8 and P0_9 pins are GPIO's */ LED_DIR |= BIT(8); LED_DIR |= BIT(9);

/* 10th and 11th pins are not GPIO's on reset */

IOCON_SWCLK_PIO0_10 |= 0x01; /* Set P0_10 pin as GPIO */

IOCON_R_PIO0_11 |= 0x01; /* Set P0_11 pin as GPIO */

LED_DIR |= BIT(10); LED_DIR |= BIT(11);

while ( 1 ) {
  LED_TOGGLE(LEDs);  //toggle leds
  delay(0x40000 );  //waste some time
}
}

    this will be easier to read.

Reply
  • 0 in reply to Sanjeev Kulkarni

    if you don't have hardware debugging capabilities, you may want to simulate your code.

    i have no idea if your is right or not but the following may be more readable:

    #define LED_PORT GPIO0DATA //output data register where the leds are on
#define LED_DIR GPIO0DIR
#define BIT(n) (1<<n)
#define LEDs (BIT(8) | BIT(9) | BIT(10) | BIT(11)) //leds on pin8/9/10/11
#define LED_ON(leds) {LED_PORT |= (leds);}  //leds active on
#define LED_OFF(leds) {LED_PORT &=~(leds);}  //leds active off
#define LED_TOGGLE(leds) {LED_PORT ^= (leds);} //toggle leds

void delay(unsigned long dly )
{ while ( dly-- );
}

void main (void ) {

/* by default P0_8 and P0_9 pins are GPIO's */ LED_DIR |= BIT(8); LED_DIR |= BIT(9);

/* 10th and 11th pins are not GPIO's on reset */

IOCON_SWCLK_PIO0_10 |= 0x01; /* Set P0_10 pin as GPIO */

IOCON_R_PIO0_11 |= 0x01; /* Set P0_11 pin as GPIO */

LED_DIR |= BIT(10); LED_DIR |= BIT(11);

while ( 1 ) {
  LED_TOGGLE(LEDs);  //toggle leds
  delay(0x40000 );  //waste some time
}
}

    this will be easier to read.

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