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