In functionuint32_t HAL_RCCEx_GetPeriphCLKFreq(uint32_t PeriphClk)string     /* Get the current I2S source */     srcclk = __HAL_RCC_GET_I2S_SOURCE();must be     /* Get the current I2S source */     srcclk = __HAL_RCC_GET_I2S_SOURCE() ? RCC_I2SCLKSOU...