STM8S_StdPeriph_Examples/RST/RST_IllegalOpcode/main.c

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/**
  ******************************************************************************
  * @file    RST_IllegalOpcode\main.c
  * @author  MCD Application Team
  * @version  V2.2.0
  * @date     30-September-2014
  * @brief   This file contains the main function for RST Illegal Opcode example.
  ******************************************************************************
  * @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 "stm8s_eval.h"


/**
  * @addtogroup RST_IllegalOpcode
  * @{
  */

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void GPIO_Config(void);
void Delay (uint16_t nCount);
/* Private functions ---------------------------------------------------------*/
/* Public functions ----------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
void main(void)
{
    uint8_t i =0;
    FlagStatus IllOpFlag = RESET;

    enableInterrupts();

    /* GPIO Configuration ------------------------------------------*/
    GPIO_Config();
                
    /* Unlock Flash */
    FLASH_Unlock(FLASH_MEMTYPE_PROG);
                
    /* Get Illegal Opcode flag status */
    IllOpFlag = RST_GetFlagStatus(RST_FLAG_ILLOPF);

    /* Test if a ILLOP Reset has occurred */
    if (IllOpFlag)
    {
        for (i=0;i<50;i++)
        {
            /* An ILLOP Reset has occurred, Toggles LD1, LD2, LD3 and LD4 */
            STM_EVAL_LEDToggle(LED1);
            STM_EVAL_LEDToggle(LED2);
            STM_EVAL_LEDToggle(LED3);
            STM_EVAL_LEDToggle(LED4);
            /* delay */
            Delay(0x7FFF);
        }
        /* Clear ILLOP Flag */
        RST_ClearFlag(RST_FLAG_ILLOPF);
    }

    /* Write an illegal opcode */
    FLASH_ProgramByte(0x9FFF, 0x75);

    while (1)
    {
        /* Toggle Leds */
                                STM_EVAL_LEDToggle(LED1);
        STM_EVAL_LEDToggle(LED2);
        STM_EVAL_LEDToggle(LED3);
        STM_EVAL_LEDToggle(LED4);
        Delay(0xFFFF);
    }

}

/**
  * @brief  Configure GPIO for LEDs and buttons available on the evaluation board
  * @param  None
  * @retval None
  */
static void GPIO_Config(void)
{
    /* Initialize LEDs mounted on STM8-128 EVAL board */
    STM_EVAL_LEDInit(LED1);
    STM_EVAL_LEDInit(LED2);
    STM_EVAL_LEDInit(LED3);
    STM_EVAL_LEDInit(LED4);

    /* Initialize KEY pushbutton mounted on STM8-128 EVAL board */
    STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
    
    /* Switch LEDs Off */
    STM_EVAL_LEDOff(LED1);
    STM_EVAL_LEDOff(LED2);
    STM_EVAL_LEDOff(LED3);
    STM_EVAL_LEDOff(LED4);
}

/**
  * @brief  Delay.
  * @param  nCount
  * @retval None
  */
void Delay(uint16_t nCount)
{
    /* Decrement nCount value */
    while (nCount != 0)
    {
        nCount--;
    }
}

#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****/