STM32F0xx Standard Peripherals Firmware Library: main.c Source File

00001 /**
00002   ******************************************************************************
00003   * @file    USART/USART_HyperTerminalInterrupt/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 HyperTerminal_Interrupt
00036   * @{
00037   */
00038 
00039 /* Private typedef -----------------------------------------------------------*/
00040 /* Private define ------------------------------------------------------------*/
00041 /* Private macro -------------------------------------------------------------*/
00042 /* Private variables ---------------------------------------------------------*/
00043 extern uint8_t NbrOfDataToTransfer;
00044 extern uint8_t NbrOfDataToRead;
00045 extern __IO uint8_t TxCount; 
00046 extern __IO uint16_t RxCount; 
00047 
00048 /* Private function prototypes -----------------------------------------------*/
00049 static void USART_Config(void);
00050 static void NVIC_Config(void);
00051 
00052 
00053 /* Private functions ---------------------------------------------------------*/
00054 
00055 /**
00056   * @brief  Main program.
00057   * @param  None
00058   * @retval None
00059   */
00060 int main(void)
00061 {
00062   /*!< At this stage the microcontroller clock setting is already configured, 
00063   this is done through SystemInit() function which is called from startup
00064   file (startup_stm32f0xx.s) before to branch to application main.
00065   To reconfigure the default setting of SystemInit() function, refer to
00066   system_stm32f0xx.c file
00067   */ 
00068   
00069   /* NVIC configuration */
00070   NVIC_Config();
00071   
00072   /* USART configuration */
00073   USART_Config();
00074   
00075   /* Enable the EVAL_COM1 Transmoit interrupt: this interrupt is generated when the 
00076   EVAL_COM1 transmit data register is empty */  
00077   USART_ITConfig(EVAL_COM1, USART_IT_TXE, ENABLE);
00078   
00079   /* Wait until EVAL_COM1 send the TxBuffer */
00080   while(TxCount < NbrOfDataToTransfer)
00081   {}
00082   
00083   /* The software must wait until TC=1. The TC flag remains cleared during all data
00084   transfers and it is set by hardware at the last frame�s end of transmission*/
00085   while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
00086   {}
00087   
00088   /* Enable the EVAL_COM1 Receive interrupt: this interrupt is generated when the 
00089   EVAL_COM1 receive data register is not empty */
00090   USART_ITConfig(EVAL_COM1, USART_IT_RXNE, ENABLE);
00091   
00092   /* Wait until EVAL_COM1 receive the RxBuffer */
00093   while(RxCount < NbrOfDataToRead)
00094   {}
00095   
00096   /* Infinite loop */
00097   while (1)
00098   {
00099   }
00100 }
00101 
00102 /**
00103   * @brief  Configures the nested vectored interrupt controller.
00104   * @param  None
00105   * @retval None
00106   */
00107 static void NVIC_Config(void)
00108 {
00109   NVIC_InitTypeDef NVIC_InitStructure;
00110 
00111   /* Enable the USART Interrupt */
00112   NVIC_InitStructure.NVIC_IRQChannel = EVAL_COM1_IRQn;
00113   NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
00114   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
00115   NVIC_Init(&NVIC_InitStructure);
00116 }
00117 
00118 /**
00119   * @brief Configure the USART Device
00120   * @param  None
00121   * @retval None
00122   */
00123 static void USART_Config(void)
00124 {
00125   USART_InitTypeDef USART_InitStructure;
00126     
00127 /* USARTx configured as follow:
00128   - BaudRate = 9600 baud  
00129   - Word Length = 8 Bits
00130   - Two Stop Bit
00131   - Odd parity
00132   - Hardware flow control disabled (RTS and CTS signals)
00133   - Receive and transmit enabled
00134   */
00135   USART_InitStructure.USART_BaudRate = 9600;
00136   USART_InitStructure.USART_WordLength = USART_WordLength_8b;
00137   USART_InitStructure.USART_StopBits = USART_StopBits_2;
00138   USART_InitStructure.USART_Parity = USART_Parity_Odd;
00139   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
00140   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
00141   
00142   STM_EVAL_COMInit(COM1, &USART_InitStructure);
00143 }
00144 
00145 #ifdef  USE_FULL_ASSERT
00146 
00147 /**
00148   * @brief  Reports the name of the source file and the source line number
00149   *         where the assert_param error has occurred.
00150   * @param  file: pointer to the source file name
00151   * @param  line: assert_param error line source number
00152   * @retval None
00153   */
00154 void assert_failed(uint8_t* file, uint32_t line)
00155 { 
00156   /* User can add his own implementation to report the file name and line number,
00157      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
00158 
00159   /* Infinite loop */
00160   while (1)
00161   {
00162   }
00163 }
00164 #endif
00165 
00166 /**
00167   * @}
00168   */
00169 
00170 /**
00171   * @}
00172   */
00173 
00174 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/