CCS/CC2640R2F: GPIO_write isn't working

PATRICK OHARA

Part Number: CC2640R2F

Tool/software: Code Composer Studio

Hello all,

I've configured the BLED (Blue LED) on my board file BoardGpioInitTable[] like this:

const PIN_Config  BoardGpioInitTable[] = {

    Board_GLED       | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH   | PIN_PUSHPULL | PIN_DRVSTR_MAX,    /* LED initially off             */
    Board_BLED       | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW    | PIN_PUSHPULL | PIN_DRVSTR_MIN,    /* LED initially off             */
    Board_RLED       | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH   | PIN_PUSHPULL | PIN_DRVSTR_MAX,    /* LED initially off             */
    Board_KEY1       | PIN_INPUT_EN  | PIN_PULLUP | PIN_HYSTERESIS | PINCC26XX_WAKEUP_NEGEDGE,  /* Button is active low          */
    Board_KEY2       | PIN_INPUT_EN  | PIN_PULLUP | PIN_HYSTERESIS,                             /* Button is active low          */
    Board_SPI0_CSN   | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH   | PIN_PUSHPULL,                     /* CS pin at inactive level      */
    Board_ADC0       | PIN_INPUT_EN  | PIN_PULLDOWN,                                            /* ADC Enable                    */

    Board_UART_TX    | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN   | PIN_PULLUP,                       /* UART TX pin at inactive level */
    Board_UART_RX    | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN   | PIN_PULLUP,                       /* UART RX pin at inactive level */
    PIN_TERMINATE

The BLED pin is defined like this:

//LEDs
#define Board_LED_ON                        0 /* LEDs on SaBLE-x EM board LEDs are active low */
#define Board_LED_OFF                       1
#define Board_GLED                          IOID_14
#define Board_BLED                          IOID_7
#define Board_RLED                          IOID_4

In SimplePeripheral.c I want to simply turn on the BLED when advertising starts. So I tried to call GPIO_write(Board_BLED, Board_LED_ON) like this:

static void SimplePeripheral_processAppMsg(spEvt_t *pMsg)
{
  bool dealloc = TRUE;

  switch (pMsg->event)
  {
    case SP_CHAR_CHANGE_EVT:
      SimplePeripheral_processCharValueChangeEvt(*(uint8_t*)(pMsg->pData));
      break;

    case SP_KEY_CHANGE_EVT:
      SimplePeripheral_handleKeys(*(uint8_t*)(pMsg->pData));
      break;

    case SP_ADV_EVT:
      GPIO_write(Board_BLED, Board_LED_ON);
      SimplePeripheral_processAdvEvent((spGapAdvEventData_t*)(pMsg->pData));
      break;

Unfortunately the blue LED doesn't turn on. Am I doing something wrong? BTW if I change the state in the BoardGpioInitTable[] in the board file from low to high and vice versa I can change the state of the LED off->on / on->off.

Help please.

Patrick

over 6 years ago

0 J Lindh over 6 years ago

TI__Guru 57865 points

Hi Patrick,
How is the LED physically connected? You say changing PIN_GPIO_LOW to _HIGH makes it work?

0 PATRICK OHARA over 6 years ago in reply to J Lindh

Genius 3205 points

Hi Joakim,

This is a simple surface mount LED mounted on our custom PCB. It's connected directly to DIO7 with a series current limiting resistor to ground. I know that this LED works because when I change state of the gpioTable in the board file from high to low the LED changes state at start up. Do you see anything wrong in my code? Is there a safe place in SimplePeripheral to simply turn on and off the LED. Maybe I should not have placed in the function that I did.

Thanks,

Patrick

0 Markel Robregado over 6 years ago in reply to PATRICK OHARA

Guru 86745 points

Hi Patrick,

At your Board Init Table you set initially the BLED as high so it will be off on device power up.

Board_BLED | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MIN,

Then you re-initialize the the led in your c file same with what is done at pininterrupt example proram

/*
* Initial LED pin configuration table
* - LEDs Board_PIN_LED0 is on.
* - LEDs Board_PIN_LED1 is off.
*/
PIN_Config ledPinTable[] = {
Board_BLED | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL | PIN_DRVSTR_MIN,
PIN_TERMINATE
};

The you use Pin_open to get the handle like this below.

/* Open LED pins */
ledPinHandle = PIN_open(&ledPinState, ledPinTable);

to turn on the led

PIN_setOutputValue(ledPinHandle,Board_BLED, 0);

-kel

0 PATRICK OHARA over 6 years ago in reply to Markel Robregado

Genius 3205 points

Thanks very much!

Bluetooth®︎

Bluetooth forum

CCS/CC2640R2F: GPIO_write isn't working