STM8S/A Standard Peripherals Firmware Library: main.c Source File

00001 /**
00002   ******************************************************************************
00003   * @file    CLK_ClockSecuritySystem\main.c
00004   * @author  MCD Application Team
00005   * @version  V2.2.0
00006   * @date     30-September-2014
00007   * @brief   This file contains the main function for the CLK CSS example.
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 "stm8s.h"
00030 #include "stm8s_eval.h"
00031 
00032 /**
00033   * @addtogroup CLK_ClockSecuritySystem
00034   * @{
00035   */
00036 
00037 /* Private typedef -----------------------------------------------------------*/
00038 /* Private define ------------------------------------------------------------*/
00039 /* Private macro -------------------------------------------------------------*/
00040 /* Private variables ---------------------------------------------------------*/
00041 /* Private function prototypes -----------------------------------------------*/
00042 static void CLK_Config(void);
00043 static void GPIO_Config(void);
00044 void Delay(uint16_t nCount);
00045 /* Private functions ---------------------------------------------------------*/
00046 
00047 /**
00048   * @brief  Main program.
00049   * @param  None
00050   * @retval None
00051   */
00052 void main(void)
00053 {
00054    uint16_t i = 0;
00055 
00056    /* Init GPIO for LED  */
00057    GPIO_Config();
00058 
00059    /* CLK configuration --------------------------------------------*/
00060    CLK_Config();
00061 
00062    while (1)
00063    {
00064      /*  Toggle the LEDs  */
00065      STM_EVAL_LEDToggle(LED1);
00066      STM_EVAL_LEDToggle(LED2);
00067      STM_EVAL_LEDToggle(LED3);
00068      STM_EVAL_LEDToggle(LED4);
00069      for (i = 0; i < 2; i++)
00070      {
00071          Delay((uint16_t)60000);
00072      }
00073    }
00074 }
00075 
00076 /**
00077   * @brief  Configure system clock to use HSE as source clock and to enable the 
00078   *         Clock Security System (CSS)  
00079   * @param  None
00080   * @retval None
00081   */
00082 static void CLK_Config(void)
00083 {
00084     ErrorStatus status = ERROR;
00085     
00086     CLK_DeInit();
00087     
00088     status = CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSE, DISABLE,
00089                                    CLK_CURRENTCLOCKSTATE_DISABLE);
00090 
00091     /*Enable CSS interrupt */
00092     CLK_ITConfig(CLK_IT_CSSD, ENABLE);
00093     
00094     /* Enable CCS */
00095     CLK_ClockSecuritySystemEnable();
00096 
00097     /* Output Fcpu on CLK_CCO pin */
00098     CLK_CCOConfig(CLK_OUTPUT_MASTER);
00099     
00100     enableInterrupts();
00101 }
00102 
00103 /**
00104   * @brief  Configure GPIO for LEDs available on the evaluation board
00105   * @param  None
00106   * @retval None
00107   */
00108 static void GPIO_Config(void)
00109 {
00110     /* Initialize LEDs mounted on STM8-128 EVAL board */
00111     STM_EVAL_LEDInit(LED1);
00112     STM_EVAL_LEDInit(LED2);
00113     STM_EVAL_LEDInit(LED3);
00114     STM_EVAL_LEDInit(LED4);
00115 }
00116 
00117 /**
00118   * @brief  Delay.
00119   * @param  nCount
00120   * @retval None
00121   */
00122 void Delay(uint16_t nCount)
00123 {
00124     /* Decrement nCount value */
00125     while (nCount != 0)
00126     {
00127         nCount--;
00128     }
00129 }
00130 
00131 
00132 #ifdef USE_FULL_ASSERT
00133 
00134 /**
00135   * @brief  Reports the name of the source file and the source line number
00136   *         where the assert_param error has occurred.
00137   * @param  file: pointer to the source file name
00138   * @param  line: assert_param error line source number
00139   * @retval None
00140   */
00141 void assert_failed(uint8_t* file, uint32_t line)
00142 { 
00143   /* User can add his own implementation to report the file name and line number,
00144      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
00145 
00146   /* Infinite loop */
00147   while (1)
00148   {
00149   }
00150 }
00151 #endif
00152 
00153 /**
00154   * @}
00155   */
00156 
00157 
00158 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/