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api_out.c
Package: STM32-uCOS-II_UAV.rar　[view]
Upload User: yj_qqy
Upload Date: 2017-01-28
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Code Size: 2k
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uCOS

Development Platform:

C/C++

api_out.c：Code Content
  1. /*
  2. **********************************************************************
  3. *                          Micrium, Inc.
  4. *                      949 Crestview Circle
  5. *                     Weston,  FL 33327-1848
  6. *
  7. *                            uC/FS
  8. *
  9. *             (c) Copyright 2001 - 2003, Micrium, Inc.
  10. *                      All rights reserved.
  11. *
  12. ***********************************************************************
  14. ----------------------------------------------------------------------
  15. File        : api_out.c
  16. Purpose     : FS write functions
  17. ----------------------------------------------------------------------
  18. Known problems or limitations with current version
  19. ----------------------------------------------------------------------
  20. None.
  21. ---------------------------END-OF-HEADER------------------------------
  22. */
  24. /*********************************************************************
  25. *
  26. *             #include Section
  27. *
  28. **********************************************************************
  29. */
  31. #include "fs_port.h"
  32. #include "fs_dev.h"
  33. #include "fs_api.h"
  34. #include "fs_os.h"
  35. #include "fs_fsl.h"
  36. #include "fs_int.h"
  39. /*********************************************************************
  40. *
  41. *             Global functions
  42. *
  43. **********************************************************************
  44. */
  46. /*********************************************************************
  47. *
  48. *             FS_FWrite
  49. *
  50.   Description:
  51.   API function. Write data to a file.
  53.   Parameters:
  54.   pData       - Pointer to a data to be written to a file. 
  55.   Size        - Size of an element to be transferred.
  56.   N           - Number of elements to be transferred to the file.
  57.   pFile       - Pointer to a FS_FILE data structure.
  58.   
  59.   Return value:
  60.   Number of elements written.
  61. */
  63. FS_size_t FS_FWrite(const void *pData, FS_size_t Size, FS_size_t N, FS_FILE *pFile) {
  64.   FS_size_t i;
  66.   if (!pFile) {
  67.     return 0; /* No pointer to a FS_FILE structure */
  68.   }
  69.   FS_X_OS_LockFileOp(pFile);
  70.   if (!pFile->mode_w) {
  71.     /* Open mode does now allow write access */
  72.     pFile->error = FS_ERR_READONLY;
  73.     FS_X_OS_UnlockFileOp(pFile);
  74.     return 0;
  75.   }
  76.   i = 0;
  77.   if (pFile->dev_index >= 0) {
  78.     if (FS__pDevInfo[pFile->dev_index].fs_ptr->fsl_fwrite) {
  79.       /* Execute the FSL function */
  80.       i = (FS__pDevInfo[pFile->dev_index].fs_ptr->fsl_fwrite)(pData, Size, N, pFile);
  81.     }
  82.   }
  83.   FS_X_OS_UnlockFileOp(pFile);
  84.   return i;  
  85. }