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[STM32F4 family] Assign CAN filter number properly 

There are 28 filter banks which are shared between CAN1 and CAN2. By default
they are divided in half:

    * CAN1 -> 0  ... 13
    * CAN2 -> 14 ... 27

that's why we need to decied which filter number has to be chosen.

Change-Id: If5f0da035c1435c61d4748b12d6617e9005cfd83
pull/1713/head
Bartosz Szczepanski 2016-04-29 10:37:51 +02:00
parent 816233cf5d
commit 1244d1504f
1 changed files with 5 additions and 1 deletions
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6
libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/can_api.c
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@ -31,6 +31,7 @@ static can_irq_handler irq_handler;
void can_init(can_t *obj, PinName rd, PinName td)
{
uint32_t filter_number;
CANName can_rd = (CANName)pinmap_peripheral(rd, PinMap_CAN_RD);
CANName can_td = (CANName)pinmap_peripheral(td, PinMap_CAN_TD);
obj->can = (CANName)pinmap_merge(can_rd, can_td);
@ -71,7 +72,10 @@ void can_init(can_t *obj, PinName rd, PinName td)
if (HAL_CAN_Init(&CanHandle) != HAL_OK) {
error("Cannot initialize CAN");
}
can_filter(obj, 0, 0, CANStandard, 0);
filter_number = (obj->can == CAN_1) ? 0 : 14;
can_filter(obj, 0, 0, CANStandard, filter_number);
}
void can_irq_init(can_t *obj, can_irq_handler handler, uint32_t id)