Hi,
I am using a custom PCB with SM32WB5MM module. I am reading a temperature sensor and I want to update its value to the advertising package in "a_AdvData".
For this I made a "shared_variable" in my main.c (for now its just defined to 10, later it wil lstore the temperature reading from sensor).
Then I made a "extern int shared_variable;" definition in main.h.
Then in app_ble.c I assign this data to the struct of "a_AdvData" package.
Main.h
/* Includes ------------------------------------------------------------------*/
#include "stm32wbxx_hal.h"
#include "app_conf.h"
#include "app_entry.h"
#include "app_common.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Exported types ------------------------------------------------------------*/
/* USER CODE BEGIN ET */
extern int shared_variable;
/* USER CODE END ET */
/* Exported constants -----
main.c
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_RF_Init();
MX_GPIO_Init();
MX_RTC_Init();
MX_I2C3_Init();
/* USER CODE BEGIN 2 */
int shared_variable = 10;
/*
uint8_t status;
VL53LMZ_Configuration Dev;
VL53LMZ_ResultsData Results;
app_ble.c (line 28)
static void Adv_Request(APP_BLE_ConnStatus_t NewStatus)
{
tBleStatus ret = BLE_STATUS_INVALID_PARAMS;
BleApplicationContext.Device_Connection_Status = NewStatus;
/* Start Fast or Low Power Advertising */
ret = aci_gap_set_discoverable(ADV_TYPE,
CFG_FAST_CONN_ADV_INTERVAL_MIN,
CFG_FAST_CONN_ADV_INTERVAL_MAX,
CFG_BLE_ADDRESS_TYPE,
ADV_FILTER,
0,
0,
0,
0,
0,
0);
if (ret != BLE_STATUS_SUCCESS)
{
APP_DBG_MSG("==>> aci_gap_set_discoverable - fail, result: 0x%x \n", ret);
}
else
{
APP_DBG_MSG("==>> aci_gap_set_discoverable - Success\n");
}
/* USER CODE BEGIN Adv_Request_1*/ //Here the values for advertising package are entered
a_AdvData[23] = shared_variable;
/* USER CODE END Adv_Request_1*/
/* Update Advertising data */
ret = aci_gap_update_adv_data(sizeof(a_AdvData), (uint8_t*) a_AdvData);
if (ret != BLE_STATUS_SUCCESS)
{
APP_DBG_MSG("==>> Start Fast Advertising Failed , result: %d \n\r", ret);
}
else
{
APP_DBG_MSG("==>> Success: Start Fast Advertising \n\r");
}
return;
}
When I assign a value(instead of using "sahred_variable") to the struct inside the app_ble.c, the correct value appears in advertising package. But when I use the attached code, I get error:
./STM32_WPAN/App/app_ble.c:1030: undefined reference to `shared_variable'
So now I am confused, is there a problem that I don't see with my extern definitions or is there some linker problems?
My project explorer:
