f103rb_usart.cpp

/**
 * @file    f103rb_usart.cpp
 * @author  ZiTe <honmonoh@gmail.com>
 */

#include "f103rb_usart.hpp"

namespace F103RB
{
  /**
   * @brief Only for USART2
   */
  USART::USART(uint32_t baud_Rate)
  {
    this->_BaudRate = baud_Rate;
  }

  void USART::Init()
  {
    GPIO tx(PA2, GPIO_Mode_AF_PP, GPIO_Speed_50MHz);
    GPIO rx(PA3, GPIO_Mode_IN_FLOATING);

    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_InitTypeDef USART_InitStructure;
    USART_StructInit(&USART_InitStructure);
    USART_InitStructure.USART_BaudRate = this->_BaudRate;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);

    // Enable "Receive data register not empty" interrupt
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

    // Enable USART
    USART_Cmd(USART2, ENABLE);

    // Clear "Transmission Complete" flag, else the first bit of data will lose.
    USART_ClearFlag(USART2, USART_FLAG_TC);
  }

  void USART::Send(uint8_t *data)
  {
    for (int i = 0; data[i] != '\0'; i++)
    {
      // Transmits single data through the USARTx peripheral
      USART_SendData(USART2, (uint16_t)data[i]);

      // Wait until transmission complete, use TC or TXE flag
      while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET)
      {
        /* Null */
      }
    }
  }

  void USART::Send(std::string data)
  {
    for (int i = 0; data[i] != '\0'; i++)
    {
      // Transmits single data through the USARTx peripheral
      USART_SendData(USART2, (uint16_t)data[i]);

      // Wait until transmission complete, use TC or TXE flag
      while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET)
      {
        /* Null */
      }
    }
  }
}