STM8S_StdPeriph_Examples/UART1/UART1_Printf/main.c

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/**
  ******************************************************************************
  * @file UART1_Printf\main.c
  * @brief This file contains the main function for: retarget the C library printf
  *        /scanf functions to the UART1 example.
  * @author  MCD Application Team
  * @version  V2.2.0
  * @date     30-September-2014
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm8s.h"
#include "stdio.h"
/**
  * @addtogroup UART1_Printf
  * @{
  */
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#ifdef _RAISONANCE_
#define PUTCHAR_PROTOTYPE int putchar (char c)
#define GETCHAR_PROTOTYPE int getchar (void)
#elif defined (_COSMIC_)
#define PUTCHAR_PROTOTYPE char putchar (char c)
#define GETCHAR_PROTOTYPE char getchar (void)
#else /* _IAR_ */
#define PUTCHAR_PROTOTYPE int putchar (int c)
#define GETCHAR_PROTOTYPE int getchar (void)
#endif /* _RAISONANCE_ */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
void main(void)
{
  char ans;
  /*High speed internal clock prescaler: 1*/
  CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
    
  UART1_DeInit();
  /* UART1 configuration ------------------------------------------------------*/
  /* UART1 configured as follow:
        - BaudRate = 115200 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Receive and transmit enabled
        - UART1 Clock disabled
  */
  UART1_Init((uint32_t)115200, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO,
              UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TXRX_ENABLE);

  /* Output a message on Hyperterminal using printf function */
  printf("\n\rUART1 Example :retarget the C library printf()/getchar() functions to the UART\n\r");
  printf("\n\rEnter Text\n\r");

  while (1)
  {
    ans = getchar();
    printf("%c", ans);  
  }
}

/**
  * @brief Retargets the C library printf function to the UART.
  * @param c Character to send
  * @retval char Character sent
  */
PUTCHAR_PROTOTYPE
{
  /* Write a character to the UART1 */
  UART1_SendData8(c);
  /* Loop until the end of transmission */
  while (UART1_GetFlagStatus(UART1_FLAG_TXE) == RESET);

  return (c);
}

/**
  * @brief Retargets the C library scanf function to the USART.
  * @param None
  * @retval char Character to Read
  */
GETCHAR_PROTOTYPE
{
#ifdef _COSMIC_
  char c = 0;
#else
  int c = 0;
#endif
  /* Loop until the Read data register flag is SET */
  while (UART1_GetFlagStatus(UART1_FLAG_RXNE) == RESET);
    c = UART1_ReceiveData8();
  return (c);
}

#ifdef USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param file: pointer to the source file name
  * @param line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */


/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/