【BLE】STM32WB55低功耗实测(十)

LongRunning2026-04-22 11:55

1. 官方的理论数据

2. 使用官方工程验证

官方工程的路径是

\stm32cubewb-v1-20-0\STM32Cube_FW_WB_V1.20.0\Projects\P-NUCLEO-WB55.Nucleo\Applications\BLE\BLE_p2pServer

编译后无错误
注意BLE参数配置

广播间隔

c 复制代码

#define CFG_FAST_CONN_ADV_INTERVAL_MIN    (0x80)      /**< 80ms */
#define CFG_FAST_CONN_ADV_INTERVAL_MAX    (0xa0)      /**< 100ms */
#define CFG_LP_CONN_ADV_INTERVAL_MIN      (0x640)     /**< 1s */
#define CFG_LP_CONN_ADV_INTERVAL_MAX      (0xfa0)     /**< 2.5s */

static void Adv_Request(APP_BLE_ConnStatus_t NewStatus)
{
  tBleStatus ret = BLE_STATUS_INVALID_PARAMS;
  uint16_t Min_Inter, Max_Inter;

  //此处强制修改为 低速广播
  NewStatus = APP_BLE_LP_ADV;
    
  if (NewStatus == APP_BLE_FAST_ADV)
  {
    Min_Inter = AdvIntervalMin;
    Max_Inter = AdvIntervalMax;
  }
  else
  {
    Min_Inter = CFG_LP_CONN_ADV_INTERVAL_MIN;
    Max_Inter = CFG_LP_CONN_ADV_INTERVAL_MAX;
  }

使用SMPS

c 复制代码

/**
 * SMPS supply
 * SMPS not used when Set to 0
 * SMPS used when Set to 1
 */
#define CFG_USE_SMPS    1

配置低功耗模式打开

c 复制代码

/******************************************************************************
 * Low Power
 ******************************************************************************/
/**
 *  When set to 1, the low power mode is enable
 *  When set to 0, the device stays in RUN mode
 */
#define CFG_LPM_SUPPORTED    1

调试配置全部关闭

c 复制代码

/******************************************************************************
 * Debug
 ******************************************************************************/
/**
 * When set, this resets some hw resources to put the device in the same state as at power up.
 * It resets only register that may prevent the FW to run properly.
 *
 * This shall be set to 0 in a final product
 *
 */
#define CFG_HW_RESET_BY_FW         0

/**
 * keep debugger enabled while in any low power mode when set to 1
 * should be set to 0 in production
 */
#define CFG_DEBUGGER_SUPPORTED    0

/**
 * When set to 1, the traces are enabled in the BLE services
 */
#define CFG_DEBUG_BLE_TRACE     0

/**
 * Enable or Disable traces in application
 */
#define CFG_DEBUG_APP_TRACE     0

3. 测试数据

可以看到3.3V供电，平均功耗为 13uA左右
广播的间隔实测 1.7秒左右
在低功耗期间-停止模式-测试功耗为 2.6uA,与理论数据相近
使用调度器自带的软件定时器，创建一个2秒周期的软件定时器，可以看到芯片在STOP2 模式下会被周期唤醒
此时唤醒源为：广播+定时器