void uart2_init(uint32_t band)

{

  GPIO_Config_T gpioConfig;

  USART_Config_T usartConfigStruct;

  /* Enable GPIO clock */

  RCM_EnableAHBPeriphClock(RCM_AHB_PERIPH_GPIOA);

  RCM_EnableAPB1PeriphClock(USART2);

  /* Connect PXx to USARTx_Tx */

  GPIO_ConfigPinAF(GPIOA, GPIO_PIN_SOURCE_2, GPIO_AF_PIN1);



  /* Connect PXx to USARTx_Rx */

  GPIO_ConfigPinAF(GPIOA, GPIO_PIN_SOURCE_3, GPIO_AF_PIN1);

  /* Configure USART Tx as alternate function push-pull */

  gpioConfig.mode = GPIO_MODE_AF;

  gpioConfig.pin = GPIO_PIN_2;

  gpioConfig.speed = GPIO_SPEED_50MHz;

  gpioConfig.outtype = GPIO_OUT_TYPE_PP;

  gpioConfig.pupd = GPIO_PUPD_PU;

  GPIO_Config(GPIOA, &gpioConfig);



    /* Configure USART Rx as input floating */

  gpioConfig.pin = GPIO_PIN_3;

  GPIO_Config(GPIOA, &gpioConfig);

  

  usartConfigStruct.baudRate = band;

  usartConfigStruct.mode     = USART_MODE_TX_RX;

  usartConfigStruct.hardwareFlowCtrl = USART_FLOW_CTRL_NONE;

  usartConfigStruct.parity   = USART_PARITY_NONE;

  usartConfigStruct.stopBits =  USART_STOP_BIT_1;

  usartConfigStruct.wordLength = USART_WORD_LEN_8B;

  USART_Config(USART2, &usartConfigStruct);

  

  /* Enable USART */

  USART_Enable(USART2);

}



void debug_uart_sendbyte(uint8_t dat)

{

  while (USART_ReadStatusFlag(USART2, USART_FLAG_TXBE) == RESET);

  USART_TxData(USART2, dat);

}