STM32F0xx Standard Peripherals Firmware Library: main.c Source File

00001 /**
00002   ******************************************************************************
00003   * @file    USART/USART_Printf/main.c 
00004   * @author  MCD Application Team
00005   * @version V1.4.0
00006   * @date    24-July-2014
00007   * @brief   Main program body
00008   ******************************************************************************
00009   * @attention
00010   *
00011   * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
00012   *
00013   * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
00014   * You may not use this file except in compliance with the License.
00015   * You may obtain a copy of the License at:
00016   *
00017   *        http://www.st.com/software_license_agreement_liberty_v2
00018   *
00019   * Unless required by applicable law or agreed to in writing, software 
00020   * distributed under the License is distributed on an "AS IS" BASIS, 
00021   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00022   * See the License for the specific language governing permissions and
00023   * limitations under the License.
00024   *
00025   ******************************************************************************
00026   */
00027 
00028 /* Includes ------------------------------------------------------------------*/
00029 #include "main.h"
00030 
00031 /** @addtogroup STM32F0xx_StdPeriph_Examples
00032   * @{
00033   */
00034 
00035 /** @addtogroup USART_Printf
00036   * @{
00037   */ 
00038 
00039 /* Private typedef -----------------------------------------------------------*/
00040 /* Private define ------------------------------------------------------------*/
00041 /* Private macro -------------------------------------------------------------*/
00042 /* Private variables ---------------------------------------------------------*/
00043 /* Private function prototypes -----------------------------------------------*/
00044 static void USART_Config(void);
00045 
00046 #ifdef __GNUC__
00047   /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
00048      set to 'Yes') calls __io_putchar() */
00049   #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
00050 #else
00051   #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
00052 #endif /* __GNUC__ */
00053   
00054 /* Private functions ---------------------------------------------------------*/
00055 
00056 
00057 /**
00058   * @brief  Main program
00059   * @param  None
00060   * @retval None
00061   */
00062 int main(void)
00063 {
00064   /*!< At this stage the microcontroller clock setting is already configured, 
00065        this is done through SystemInit() function which is called from startup
00066        file (startup_stm32f0xx.s) before to branch to application main.
00067        To reconfigure the default setting of SystemInit() function, refer to
00068        system_stm32f0xx.c file
00069      */     
00070 
00071   /* USART configuration */
00072   USART_Config();
00073   
00074   /* Output a message on Hyperterminal using printf function */
00075   printf("\n\rUSART Printf Example: retarget the C library printf function to the USART\n\r");
00076 
00077   /* Loop until the end of transmission */
00078   /* The software must wait until TC=1. The TC flag remains cleared during all data
00079      transfers and it is set by hardware at the last frame�s end of transmission*/
00080   while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
00081   {}
00082   
00083   while (1)
00084   {
00085   }
00086 }
00087 
00088 /**
00089   * @brief Configure the USART Device
00090   * @param  None
00091   * @retval None
00092   */
00093 static void USART_Config(void)
00094 { 
00095   USART_InitTypeDef USART_InitStructure;
00096   
00097   /* USARTx configured as follow:
00098   - BaudRate = 115200 baud  
00099   - Word Length = 8 Bits
00100   - Stop Bit = 1 Stop Bit
00101   - Parity = No Parity
00102   - Hardware flow control disabled (RTS and CTS signals)
00103   - Receive and transmit enabled
00104   */
00105   USART_InitStructure.USART_BaudRate = 115200;
00106   USART_InitStructure.USART_WordLength = USART_WordLength_8b;
00107   USART_InitStructure.USART_StopBits = USART_StopBits_1;
00108   USART_InitStructure.USART_Parity = USART_Parity_No;
00109   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
00110   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
00111   
00112   STM_EVAL_COMInit(COM1, &USART_InitStructure);
00113 }
00114 
00115 /**
00116   * @brief  Retargets the C library printf function to the USART.
00117   * @param  None
00118   * @retval None
00119   */
00120 PUTCHAR_PROTOTYPE
00121 {
00122   /* Place your implementation of fputc here */
00123   /* e.g. write a character to the USART */
00124   USART_SendData(EVAL_COM1, (uint8_t) ch);
00125 
00126   /* Loop until transmit data register is empty */
00127   while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TXE) == RESET)
00128   {}
00129 
00130   return ch;
00131 }
00132 
00133 #ifdef  USE_FULL_ASSERT
00134 
00135 /**
00136   * @brief  Reports the name of the source file and the source line number
00137   *         where the assert_param error has occurred.
00138   * @param  file: pointer to the source file name
00139   * @param  line: assert_param error line source number
00140   * @retval None
00141   */
00142 void assert_failed(uint8_t* file, uint32_t line)
00143 { 
00144   /* User can add his own implementation to report the file name and line number,
00145      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
00146 
00147   /* Infinite loop */
00148   while (1)
00149   {
00150   }
00151 }
00152 #endif
00153 
00154 /**
00155   * @}
00156   */ 
00157 
00158 /**
00159   * @}
00160   */ 
00161 
00162 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/