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STM32: Set valid filter number for CAN3 

Filter numbers 14 to 27 are reserved for dual CAN configuration.
However, CAN3 operates in single CAN configuration according to the
reference manual).
pull/5667/head
Adam Heinrich 2017-12-07 18:06:05 +01:00
parent bfc4d68ae0
commit 9ee222a8e6
1 changed files with 6 additions and 0 deletions
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6
targets/TARGET_STM/can_api.c
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@ -103,7 +103,13 @@ void can_init_freq (can_t *obj, PinName rd, PinName td, int hz)
can_registers_init(obj);
/* Bits 27:14 are available for dual CAN configuration and are reserved for
single CAN configuration: */
#if defined(CAN3_BASE) && (CAN_NUM > 2)
uint32_t filter_number = (can == CAN_1 || can == CAN_3) ? 0 : 14;
#else
uint32_t filter_number = (can == CAN_1) ? 0 : 14;
#endif
can_filter(obj, 0, 0, CANStandard, filter_number);
}