STM32F091 CAN filters init, инициализация CAN фильтров на определенный сообщения Опции

[max_mart]

Народ всем привет.

Использую STM32F091. Необходимо фильтровать CAN сообщения на аппаратном уровне, чтобы успешно приходили CAN сообщения определенного ID, например, 0x434, 0x3b3, 0x171, 0x42f, 0x041.

Как это сделать?

Пробовал различные варианты по инициализации CAN_FilterIdHigh, CAN_FilterIdLow, CAN_FilterMaskIdHigh, CAN_FilterMaskIdLow, но все равно пропускается большой поток ненужных сообщений.

[max_mart]

Всем привет. Вот я так делаю:

CODE

void setup_can_filter(void)
{
CAN_FilterInitTypeDef CAN_FilterInitStructure;
/* CAN filter init 0*/
CAN_FilterInitStructure.CAN_FilterNumber = 0;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_16bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = (0x332<<5);//|(1<<4);
CAN_FilterInitStructure.CAN_FilterIdLow = (0x331<<5);//|(0<<4);
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = (0x3B3<<5);//|(1<<4);
CAN_FilterInitStructure.CAN_FilterMaskIdLow = (0x430<<5);//|(0<<4);
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
/* CAN filter init 1*/
CAN_FilterInitStructure.CAN_FilterNumber = 1;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_16bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = (0x171<<5);//|(1<<4);
CAN_FilterInitStructure.CAN_FilterIdLow = (0x0415<<5);//|(0<<4);
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = (0x0434<<5);//|(1<<4);
CAN_FilterInitStructure.CAN_FilterMaskIdLow = (0x042F<<5);//|(0<<4);
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
}

void setup_can(CAN_InitTypeDef *can, int baud)
{
CAN_StructInit(can);

CAN_DeInit(CAN);

CAN_StructInit(can);
/* CAN cell init */
can->CAN_TTCM = DISABLE;
can->CAN_ABOM = ENABLE;
can->CAN_AWUM = DISABLE;
can->CAN_NART = DISABLE; /* orig: DISABLE Transmit only once */
can->CAN_RFLM = DISABLE;
can->CAN_TXFP = DISABLE;
can->CAN_Mode = CAN_Mode_Normal;
can->CAN_SJW = CAN_SJW_1tq;
can->CAN_BS1 = CAN_BS1_13tq;
can->CAN_BS2 = CAN_BS2_2tq;

switch(baud)
{
case 1000000:
can->CAN_Prescaler = 3;
break;

case 500000:
/* CAN Baudrate = 100KBps (tested OK on real car) */
// на самом деле не 100К, а 500К (копипастеры ...)
can->CAN_Prescaler = 6;
break;

case 250000:
/* CAN Baudrate = 250KBps */
can->CAN_Prescaler = 12;
break;

case 125000:
/* CAN Baudrate = 125KBps */
can->CAN_Prescaler = 24;
break;

case 100000:
/* CAN Baudrate = 100KBps (tested OK on real car) */
can->CAN_Prescaler = 30;
break;

case 50000:
/* CAN Baudrate = 50KBps */
can->CAN_Prescaler = 60;
break;
}
setup_can_filter();
CAN_Init(CAN, can);
CAN_ITConfig(CAN, CAN_IT_FMP0, ENABLE);
}

Все равно не работает. НЕ нужные сообщения проходят. Что может быть не так?