Function USART_InitAsync

bsp/efm32/Libraries/emlib/src/em_usart.c:527–559

/ * @brief * Init USART/UART for normal asynchronous mode. * * @details * This function will configure basic settings in order to operate in normal * asynchronous mode. * * Special control setup not covered by this function must be done after * using this function by direct modification of the CTRL register. * * Notice that pins used by the USART/UART module must be properly

 *   Pointer to initialization structure used to configure basic async setup.
 ******************************************************************************/
void USART_InitAsync(USART_TypeDef *usart, const USART_InitAsync_TypeDef *init)
{
  /* Make sure the module exists on the selected chip */
  EFM_ASSERT(USART_REF_VALID(usart)||UART_REF_VALID(usart));

  /* Init USART registers to HW reset state. */
  USART_Reset(usart);

#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_TINY_FAMILY)
  /* Disable majority vote if specified. */
  if (init->mvdis)
  {
    usart->CTRL |= USART_CTRL_MVDIS;
  }

  /* Configure PRS input mode. */
  if (init->prsRxEnable)
  {
    usart->INPUT = (uint32_t)init->prsRxCh | USART_INPUT_RXPRS;
  }
#endif

  /* Configure databits, stopbits and parity */
  usart->FRAME = (uint32_t)(init->databits) |
                 (uint32_t)(init->stopbits) |
                 (uint32_t)(init->parity);

  /* Configure baudrate */
  USART_BaudrateAsyncSet(usart, init->refFreq, init->baudrate, init->oversampling);

  /* Finally enable (as specified) */
  usart->CMD = (uint32_t)(init->enable);
}


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