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[CAN/FDCAN] CMSIS-Driver CAN FD驱动对STM32H7带的2560字RAM分配，值得借鉴

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eric2013

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发表于 2021-3-24 10:45:25 | 显示全部楼层 |阅读模式

2560字RAM区：
1.png

分配如下：

  1. *   CAN_CLOCK_TOLERANCE:       defines maximum allowed clock tolerance in 1/1024 steps
  2. *     - default value:         15  (approx. 1.5 %)
  3. *   CAN_NON_ISO_EN:            used to enable non-ISO CAN FD mode
  4. *     - default value          0 (disabled)
  5. *
  6. *   CAN1 controller configuration:
  7. *   CAN1_RX_FIFO0_ELEM_NUM:    number of receive  FIFO0 elements   (default=8,   max=64)
  8. *   CAN1_RX_FIFO1_ELEM_NUM:    number of receive  FIFO1 elements   (default=8,   max=64)
  9. *   CAN1_TX_FIFO_ELEM_NUM:     number of transmit FIFO  elements   (default=8,   max=32)
  10. *   CAN1_RX_BUF_NUM:           maximum number of receive  buffers  (default=16,  max=64)
  11. *   CAN1_TX_BUF_NUM:           maximum number of transmit buffers  (default=16,  max=32)
  12. *   CAN1_FILTER_STD_NUM:       maximum number of standard elements (default=128, max=128)
  13. *   CAN1_FILTER_EXT_NUM:       maximum number of extended elements (default=64,  max=64)
  14. *
  15. *   CAN2 controller configuration:
  16. *   CAN2_RX_FIFO0_ELEM_NUM:    number of receive  FIFO0 elements   (default=8,   max=64)
  17. *   CAN2_RX_FIFO1_ELEM_NUM:    number of receive  FIFO1 elements   (default=8,   max=64)
  18. *   CAN2_TX_FIFO_ELEM_NUM:     number of transmit FIFO  elements   (default=8,   max=32)
  19. *   CAN2_RX_BUF_NUM:           maximum number of receive  buffers  (default=16,  max=64)
  20. *   CAN2_TX_BUF_NUM:           maximum number of transmit buffers  (default=16,  max=32)
  21. *   CAN2_FILTER_STD_NUM:       maximum number of standard elements (default=128, max=128)
  22. *   CAN2_FILTER_EXT_NUM:       maximum number of extended elements (default=64,  max=64)
复制代码


通过各种条件编译设置，防止用户使用时配置错误：

  1. // CAN1 controller configuration ------

  3. #ifndef CAN1_RX_FIFO0_ELEM_NUM
  4. #define CAN1_RX_FIFO0_ELEM_NUM          (8U)
  5. #endif
  6. #if    (CAN1_RX_FIFO0_ELEM_NUM > 64U)
  7. #error  Too many Receive FIFO0 Elements defined for CAN1, maximum number of Receive FIFO0 Elements is 64 !!!
  8. #endif

  10. #ifndef CAN1_RX_FIFO1_ELEM_NUM
  11. #define CAN1_RX_FIFO1_ELEM_NUM          (8U)
  12. #endif
  13. #if    (CAN1_RX_FIFO1_ELEM_NUM > 64U)
  14. #error  Too many Receive FIFO1 Elements defined for CAN1, maximum number of Receive FIFO1 Elements is 64 !!!
  15. #endif

  17. #ifndef CAN1_RX_BUF_NUM
  18. #define CAN1_RX_BUF_NUM                 (16U)
  19. #endif
  20. #if    (CAN1_RX_BUF_NUM > 64U)
  21. #error  Too many Receive Buffers defined for CAN1, maximum number of Receive Buffers is 64 !!!
  22. #endif

  24. #ifndef CAN1_TX_FIFO_ELEM_NUM
  25. #define CAN1_TX_FIFO_ELEM_NUM           (8U)
  26. #endif
  27. #if    (CAN1_TX_FIFO_ELEM_NUM > 32U)
  28. #error  Too many Transmit FIFO Elements defined for CAN1, maximum number of Transmit FIFO Elements is 32 !!!
  29. #endif

  31. #ifndef CAN1_TX_BUF_NUM
  32. #define CAN1_TX_BUF_NUM                 (16U)
  33. #endif
  34. #if    (CAN1_TX_BUF_NUM > 32U)
  35. #error  Too many Transmit Buffers defined for CAN1, maximum number of Transmit Buffers is 32 !!!
  36. #endif

  38. #if    ((CAN1_TX_FIFO_ELEM_NUM + CAN1_TX_BUF_NUM) > 32U)
  39. #error  Too many Transmit Elements and Buffers defined for CAN1, maximum number of Transmit Elements and Buffers together is 32 !!!
  40. #endif

  42. #ifndef CAN1_FILTER_STD_NUM
  43. #define CAN1_FILTER_STD_NUM             (128U)
  44. #endif
  45. #if    (CAN1_FILTER_STD_NUM > 128U)
  46. #error  Standard Filter Elements defined for CAN1, maximum number of Standard Filter Elements is 128 !!!
  47. #endif

  49. #ifndef CAN1_FILTER_EXT_NUM
  50. #define CAN1_FILTER_EXT_NUM             (64U)
  51. #endif
  52. #if    (CAN1_FILTER_EXT_NUM > 64U)
  53. #error  Extended Filter Elements defined for CAN1, maximum number of Extended Filter Elements is 64 !!!
  54. #endif

  56. #define CAN1_RX_FIFO_EN                ((CAN1_RX_FIFO0_ELEM_NUM != 0U) || (CAN1_RX_FIFO1_ELEM_NUM != 0U))
  57. #define CAN1_RX_BUF_EN                  (CAN1_RX_BUF_NUM        != 0U)
  58. #define CAN1_TX_FIFO_EN                 (CAN1_TX_FIFO_ELEM_NUM  != 0U)
  59. #define CAN1_TX_BUF_EN                  (CAN1_TX_BUF_NUM        != 0U)
  60. #define CAN1_RX_FIFO_OBJ_NUM           ((CAN1_RX_FIFO0_ELEM_NUM != 0U) + (CAN1_RX_FIFO1_ELEM_NUM != 0U))
  61. #define CAN1_RX_BUF_OBJ_NUM             (CAN1_RX_BUF_NUM)
  62. #define CAN1_RX_TOT_OBJ_NUM             (CAN1_RX_FIFO_OBJ_NUM + CAN1_RX_BUF_OBJ_NUM)
  63. #define CAN1_TX_FIFO_OBJ_NUM           ((CAN1_TX_FIFO_ELEM_NUM  != 0U))
  64. #define CAN1_TX_BUF_OBJ_NUM             (CAN1_TX_BUF_NUM)
  65. #define CAN1_TX_TOT_OBJ_NUM             (CAN1_TX_FIFO_OBJ_NUM + CAN1_TX_BUF_OBJ_NUM)
  66. #define CAN1_TOT_OBJ_NUM                (CAN1_RX_TOT_OBJ_NUM  + CAN1_TX_TOT_OBJ_NUM)
  67. #define CAN1_TOT_ELEM_NUM               (CAN1_RX_FIFO0_ELEM_NUM + CAN1_RX_FIFO1_ELEM_NUM + CAN1_RX_BUF_NUM + CAN1_TX_BUF_NUM)

  69. #define CAN1_RAM_OFS_STD_ID             (0U)
  70. #define CAN1_RAM_OFS_EXT_ID             (CAN1_RAM_OFS_STD_ID        +   CAN1_FILTER_STD_NUM)
  71. #define CAN1_RAM_OFS_RX_FIFO0           (CAN1_RAM_OFS_EXT_ID        +  (CAN1_FILTER_EXT_NUM    * 2U))
  72. #define CAN1_RAM_OFS_RX_FIFO1           (CAN1_RAM_OFS_RX_FIFO0      +  (CAN1_RX_FIFO0_ELEM_NUM * 18U))
  73. #define CAN1_RAM_OFS_RX_BUFFER          (CAN1_RAM_OFS_RX_FIFO1      +  (CAN1_RX_FIFO1_ELEM_NUM * 18U))
  74. #define CAN1_RAM_OFS_TX_EVENT_FIFO      (CAN1_RAM_OFS_RX_BUFFER     +  (CAN1_RX_BUF_NUM        * 18U))
  75. #define CAN1_RAM_OFS_TX_BUFFER          (CAN1_RAM_OFS_TX_EVENT_FIFO +  (CAN1_TX_FIFO_ELEM_NUM  * 2U))
  76. #define CAN1_TOT_RAM                    (CAN1_RAM_OFS_TX_BUFFER     + ((CAN1_TX_FIFO_ELEM_NUM  + CAN1_RX_BUF_OBJ_NUM) * 18U))


  79. // CAN2 controller configuration ------

  81. #ifndef CAN2_RX_FIFO0_ELEM_NUM
  82. #define CAN2_RX_FIFO0_ELEM_NUM          (8U)
  83. #endif
  84. #if    (CAN2_RX_FIFO0_ELEM_NUM > 64U)
  85. #error  Too many Receive FIFO0 Elements defined for CAN2, maximum number of Receive FIFO0 Elements is 64 !!!
  86. #endif

  88. #ifndef CAN2_RX_FIFO1_ELEM_NUM
  89. #define CAN2_RX_FIFO1_ELEM_NUM          (8U)
  90. #endif
  91. #if    (CAN2_RX_FIFO1_ELEM_NUM > 64U)
  92. #error  Too many Receive FIFO1 Elements defined for CAN2, maximum number of Receive FIFO1 Elements is 64 !!!
  93. #endif

  95. #ifndef CAN2_RX_BUF_NUM
  96. #define CAN2_RX_BUF_NUM                 (16U)
  97. #endif
  98. #if    (CAN2_RX_BUF_NUM > 64U)
  99. #error  Too many Receive Buffers defined for CAN2, maximum number of Receive Buffers is 64 !!!
  100. #endif

  102. #ifndef CAN2_TX_FIFO_ELEM_NUM
  103. #define CAN2_TX_FIFO_ELEM_NUM           (8U)
  104. #endif
  105. #if    (CAN2_TX_FIFO_ELEM_NUM > 32U)
  106. #error  Too many Transmit FIFO Elements defined for CAN2, maximum number of Transmit FIFO Elements is 32 !!!
  107. #endif

  109. #ifndef CAN2_TX_BUF_NUM
  110. #define CAN2_TX_BUF_NUM                 (16U)
  111. #endif
  112. #if    (CAN2_TX_BUF_NUM > 32U)
  113. #error  Too many Transmit Buffers defined for CAN2, maximum number of Transmit Buffers is 32 !!!
  114. #endif

  116. #if    ((CAN2_TX_FIFO_ELEM_NUM + CAN2_TX_BUF_NUM) > 32U)
  117. #error  Too many Transmit Elements and Buffers defined for CAN2, maximum number of Transmit Elements and Buffers together is 32 !!!
  118. #endif

  120. #ifndef CAN2_FILTER_STD_NUM
  121. #define CAN2_FILTER_STD_NUM             (128U)
  122. #endif
  123. #if    (CAN2_FILTER_STD_NUM > 128U)
  124. #error  Standard Filter Elements defined for CAN2, maximum number of Standard Filter Elements is 128 !!!
  125. #endif

  127. #ifndef CAN2_FILTER_EXT_NUM
  128. #define CAN2_FILTER_EXT_NUM             (64U)
  129. #endif
  130. #if    (CAN2_FILTER_EXT_NUM > 64U)
  131. #error  Extended Filter Elements defined for CAN2, maximum number of Extended Filter Elements is 64 !!!
  132. #endif

  134. #define CAN2_RX_FIFO_EN                ((CAN2_RX_FIFO0_ELEM_NUM != 0U) || (CAN2_RX_FIFO1_ELEM_NUM != 0U))
  135. #define CAN2_RX_BUF_EN                  (CAN2_RX_BUF_NUM        != 0U)
  136. #define CAN2_TX_FIFO_EN                 (CAN2_TX_FIFO_ELEM_NUM  != 0U)
  137. #define CAN2_TX_BUF_EN                  (CAN2_TX_BUF_NUM        != 0U)
  138. #define CAN2_RX_FIFO_OBJ_NUM           ((CAN2_RX_FIFO0_ELEM_NUM != 0U) + (CAN2_RX_FIFO1_ELEM_NUM != 0U))
  139. #define CAN2_RX_BUF_OBJ_NUM             (CAN2_RX_BUF_NUM)
  140. #define CAN2_RX_TOT_OBJ_NUM             (CAN2_RX_FIFO_OBJ_NUM + CAN2_RX_BUF_OBJ_NUM)
  141. #define CAN2_TX_FIFO_OBJ_NUM           ((CAN2_TX_FIFO_ELEM_NUM  != 0U))
  142. #define CAN2_TX_BUF_OBJ_NUM             (CAN2_TX_BUF_NUM)
  143. #define CAN2_TX_TOT_OBJ_NUM             (CAN2_TX_FIFO_OBJ_NUM + CAN2_TX_BUF_OBJ_NUM)
  144. #define CAN2_TOT_OBJ_NUM                (CAN2_RX_TOT_OBJ_NUM  + CAN2_TX_TOT_OBJ_NUM)
  145. #define CAN2_TOT_ELEM_NUM               (CAN2_RX_FIFO0_ELEM_NUM + CAN2_RX_FIFO1_ELEM_NUM + CAN2_RX_BUF_NUM + CAN2_TX_BUF_NUM)

  147. #define CAN2_RAM_OFS_STD_ID             (0U)
  148. #define CAN2_RAM_OFS_EXT_ID             (CAN2_RAM_OFS_STD_ID        +   CAN2_FILTER_STD_NUM)
  149. #define CAN2_RAM_OFS_RX_FIFO0           (CAN2_RAM_OFS_EXT_ID        +  (CAN2_FILTER_EXT_NUM * 2U))
  150. #define CAN2_RAM_OFS_RX_FIFO1           (CAN2_RAM_OFS_RX_FIFO0      +  (CAN2_RX_FIFO0_ELEM_NUM * 18U))
  151. #define CAN2_RAM_OFS_RX_BUFFER          (CAN2_RAM_OFS_RX_FIFO1      +  (CAN2_RX_FIFO1_ELEM_NUM * 18U))
  152. #define CAN2_RAM_OFS_TX_EVENT_FIFO      (CAN2_RAM_OFS_RX_BUFFER     +  (CAN2_RX_BUF_NUM * 18U))
  153. #define CAN2_RAM_OFS_TX_BUFFER          (CAN2_RAM_OFS_TX_EVENT_FIFO +  (CAN2_TX_FIFO_ELEM_NUM * 2U))
  154. #define CAN2_TOT_RAM                    (CAN2_RAM_OFS_TX_BUFFER     + ((CAN2_TX_FIFO_ELEM_NUM + CAN2_RX_BUF_OBJ_NUM) * 18U))

  156. // Check Message RAM configuration
  157. #if ((CAN1_USED == 1) && (CAN2_USED == 0) && (CAN1_TOT_RAM > 2560U))
  158.   #error Message RAM contains only 10 kB, current configuration of CAN1 requires more memory, please reduce number of FIFO or buffer elements for Receive or Transmit!
  159. #endif
  160. #if ((CAN1_USED == 0) && (CAN2_USED == 1) && (CAN2_TOT_RAM > 2560U))
  161.   #error Message RAM contains only 10 kB, current configuration of CAN2 requires more memory, please reduce number of FIFO or buffer elements for Receive or Transmit!
  162. #endif
  163. #if ((CAN1_USED == 1) && (CAN2_USED == 1) && ((CAN1_TOT_RAM + CAN2_TOT_RAM) > 2560U))
  164.   #error Message RAM contains only 10 kB, current configuration of CAN1 and CAN2 requires more memory, please reduce number of FIFO or buffer elements for Receive or Transmit!
  165. #endif

  167. // CAN message RAM base
  168. #define CAN_RAM_BASE                    (0x4000AC00)
复制代码

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