Function USART_InitSync

bsp/efm32/Libraries/emlib/src/em_usart.c:586–619

/ * @brief * Init USART for synchronous mode. * * @details * This function will configure basic settings in order to operate in * synchronous 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 module must be properly configured * by the use

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

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

  /* Set bits for synchronous mode */
  usart->CTRL |= (USART_CTRL_SYNC) |
                 ((uint32_t)init->clockMode) |
                 (init->msbf ? USART_CTRL_MSBF : 0);

#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_TINY_FAMILY)
  usart->CTRL |= (init->prsRxEnable ? USART_INPUT_RXPRS : 0) |
                 (init->autoTx      ? USART_CTRL_AUTOTX : 0);
#endif

  /* Configure databits, leave stopbits and parity at reset default (not used) */
  usart->FRAME = ((uint32_t)(init->databits)) |
                 (USART_FRAME_STOPBITS_DEFAULT) |
                 (USART_FRAME_PARITY_DEFAULT);

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

  /* Finally enable (as specified) */
  if (init->master)
  {
    usart->CMD = USART_CMD_MASTEREN;
  }

  usart->CMD = (uint32_t)(init->enable);
}


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