#include "stm32fxx_STUlib.h"


/**
  * @brief  Initializes the pointer to the RAM for the run-time
  *   transparent functional test.
  * @param  : None
  * @retval : None
  */
void STU_RamRunInit(void)
{
  /* start address of the test has to be aligned to 16 address range */	  
   pRunTimeRamChk = (uint32_t *)((uint32_t)CLASS_B_START & 0xFFFFFFFCuL);
   pRunTimeRamChkInv = (uint32_t *)(uint32_t)(~(uint32_t)pRunTimeRamChk);
}

/* ---------------------------------------------------------------------------*/
/**
  * @brief  This function verifies that 4 words of RAM are functional,
  *   overlapping) using the walkpat algorithm.
  * @param  : None
  * @retval : STU_TestStatus (TEST_RUNNING, CLASS_C_DATA_FAIL,
  *   TEST_FAILURE, TEST_OK)
  */
STU_TestStatus STU_RamRun(void)
{
  STU_TestStatus result = TEST_RUNNING;
  
  /* Check Class C var integrity */
  if ((((uint32_t)pRunTimeRamChk) ^ ((uint32_t)pRunTimeRamChkInv)) == 0xFFFFFFFFuL)
  {
    if (pRunTimeRamChk >= CLASS_B_END)
    {
      /*------------- March test applied on the RAM Buffer itself --------------- */
      if (STU_RamWalkpatStep(&aRunTimeRamBuf[0], &aRunTimeRamBuf[0]) == 1)         
      {
        /* All the RAM test is completed successfully */
        result = TEST_OK;
      }
      else  /* Buffer is not functional */
      {
        result = TEST_FAILURE;
      }
      /* Init next cycle of the transparent RAM test starting from the begin of the Class B area */
      pRunTimeRamChk = CLASS_B_START;
      pRunTimeRamChkInv = ((uint32_t *)~((uint32_t)CLASS_B_START));
    }
    else
    { /* ------------- RAM test applied on Class B data area ------------------ */
      /* !!! Application has to ensure that no write or read operation
               is performed within Class B RAM area during this test !!!      */
      if (STU_RamWalkpatStep(pRunTimeRamChk, &aRunTimeRamBuf[0]) == 1)         
      {
        /* Prepare next Row Transparent RAM test */
        pRunTimeRamChk += RT_RAM_BLOCKSIZE - (2u * RT_RAM_BLOCK_OVERLAP);
        pRunTimeRamChkInv = (uint32_t *)(uint32_t)(~(uint32_t)pRunTimeRamChk);
      }
      else
      {
        result = TEST_FAILURE;  /* Word line under test was not functional */
      }
    }
  }
  else  /* Class C error on pRunTimeRamChk */
  {
    result = CLASS_C_DATA_FAIL;
  }
  return (result);  
}

/**********************END OF FILE***********************************/