SPC564B74 FlexCANs are limited to 32 Mailboxes instead of 64

[aurelien23]

Posted on September 02, 2015 at 15:30

Hello,

I'm using SPC5Studio V3.6 and SPC564B74. The HAL drivers are limiting FlexCAN mailbox number to 32 but this CPU has 64 MB per FlexCAN. I can change SPC5_CAN_NUM_RX_MAILBOXES and SPC5_CAN_NUM_TX_MAILBOXES définitions in mcuconf.h but this file seems not to be ''patchable''. It has to be changed manually every time the code is generated. Fixes is welcome. Aurélien

[Erwan YVIN]

Posted on September 02, 2015 at 17:41 Hello Aurelien, there is well an issue SPC564B74 HAL Drivers component. it should be limited to 64 not we are correcting the issue. in waiting for SPC5Studio 3.7, i advice you to put in patch mode in can_lld.c (Cf below)

/**

* @brief Number of RX mailboxes. */ #undef SPC5_CAN_NUM_RX_MAILBOXES #if !defined(SPC5_CAN_NUM_RX_MAILBOXES) || defined(__DOXYGEN__) #define SPC5_CAN_NUM_RX_MAILBOXES YOUR_VALUE #endif

/**

* @brief Number of TX mailboxes. */ #undef SPC5_CAN_NUM_TX_MAILBOXES #if !defined(SPC5_CAN_NUM_TX_MAILBOXES) || defined(__DOXYGEN__) #define SPC5_CAN_NUM_TX_MAILBOXES YOUR_VALUE_2 #endif

#if (SPC5_CAN_NUM_RX_MAILBOXES < 1) || (SPC5_CAN_NUM_RX_MAILBOXES > 64)

#error ''invalid number of RX mailboxes'' #endif #if (SPC5_CAN_NUM_TX_MAILBOXES < 1) || (SPC5_CAN_NUM_TX_MAILBOXES > 64) #error ''invalid number of TX mailboxes'' #endif #if (SPC5_CAN_NUM_RX_MAILBOXES + SPC5_CAN_NUM_TX_MAILBOXES) > 64 #error ''invalid amount of RX and TX mailboxes'' #endif Best regards Erwan