Struct members initialization fails - do not compile

Hi everyone,

I want to create a GPIO initialization procedure based on the version of the evaluation board that is used. So, I have a structure with the GPIOs and then two macros for setting the GPIOs

Code:

---

struct GPIO_def  {
  uint8_t def_MUX_ADD0;        /**< MUX Address channel 1 */
  uint8_t def_MUX_ADD1;        /**< MUX Address channel 2 */
  uint8_t def_MUX_ADD2;        /**< MUX Address channel 3 */
  uint8_t def_IMU_wakeUp_INT1; /**< sense IMU's interrupt from channel 1 */
  uint8_t def_IMU_INT2;        /**< IMU Interrupt pin */
  uint8_t def_vibrator;        /**< Control the vibrator - 0: vibrator OFF , 1: vibrator ON */
  uint8_t def_WC_CHG;          /**< Monitor WPT (Wireless Power Transfer) - 0: wireless charging ON , 1: wireless charging OFF */
  uint8_t def_BM;              /**< Battery monitor */
  uint8_t def_PG;              /**< Power good indication of back converter */
  uint8_t def_CTRL;            /**< Enable/disable the auxiliary load output of back converter */
  uint8_t def_ADC_IN;          /**< Read Op Amps output */
};


#define GPIO_EVB_V2_DEF        \
  {                            \
    .def_MUX_ADD0 = 33,        \
    .def_MUX_ADD1 = 34,        \
    .def_MUX_ADD2 = 35,        \
    .def_IMU_wakeUp_INT1 = 39, \
    .def_IMU_INT2 = 40,        \
    .def_WC_CHG = 46,          \
    .def_BM = 47,              \
    .def_PG = 42,              \
    .def_CTRL = 43,            \
    .def_ADC_IN = 3            \
  }


#define GPIO_EVB_V3_DEF        \
  {                            \
    .def_MUX_ADD0 = 6,        \
    .def_MUX_ADD1 = 8,        \
    .def_MUX_ADD2 = 41,        \
    .def_IMU_wakeUp_INT1 = 44, \
    .def_IMU_INT2 = 42,        \
    .def_vibrator = 4,        \
    .def_WC_CHG = 5,          \
    .def_BM = 10,              \
    .def_PG = 15,              \
    .def_CTRL = 13,            \
    .def_ADC_IN = 30          \
  }

---

Then I have the GPIO_init function to assing the GPIO values based on the version of the evaluation board

Code:

---

void GPIO_init(uint8_t evb) {
struct GPIO_def GPIO_set;


  switch (evb) {


  case EVB_V2: ;
    GPIO_set = GPIO_EVB_V2_DEF;
    break;


  case EVB_V3: ;
    GPIO_set = GPIO_EVB_V3_DEF;
    break;


  default:
    break;
  }
}

---

The problem is that when I create the structure instance and use the switch..case statement to assing the GPIO values the program do not compile...
It returns this error
https://cboard.cprogramming.com/imag...AASUVORK5CYII=
but I am sure that I do not have forget any bracket or comma or stuff like that.. I 've noticed that when I initialize like this

Code:

---

struct GPIO_def GPIO_set = GPIO_EVB_V2_DEF;

---

before switch statement it compiles..

How could I work around this?

You need to use a typecast:

Code:

---

#define GPIO_EVB_V2_DEF        \
  (struct GPIO_def)            \
  {                            \
    .def_MUX_ADD0 = 33,        \
    .def_MUX_ADD1 = 34,        \
    .def_MUX_ADD2 = 35,        \
    .def_IMU_wakeUp_INT1 = 39, \
    .def_IMU_INT2 = 40,        \
    .def_WC_CHG = 46,          \
    .def_BM = 47,              \
    .def_PG = 42,              \
    .def_CTRL = 43,            \
    .def_ADC_IN = 3            \
  }

---

And presumably you want GPIO_set to be global.

Thanks for your reply,

After using a typecast it compiles but when I try to initialize the GPIO_def structure the members remains to 0 and don't get the values from neither GPIO_EVB_V2_DEF or GPIO_EVB_V3_DEF structs

What am I missing?

You need to post the smallest code that is not working!

You do realize the code you posted will not work because you set a variable that is local to the function, right?

Tim S.

Ok I figure it out!! thanks!!