CAN на STM32, скрость передачи по CAN Опции

[DmitryDI]

Все сконфигурировал как в исходниках, но не работает. Чип STM32F107, кварц 25 Мгц, Нужен 1 МГбит/c

Настройки
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_16tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 1;

Скорость = 25 МГц/(1+16+8) = 1 МГбит/c

Обмена данных с проверенным мастером нет. ???
Заранее спасибо за помощь.

конфигурация полностью

CODE

void CAN_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

/* Configure CAN1 and CAN2 IOs **********************************************/
/* GPIOB, GPIOD and AFIO clocks enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOB, ENABLE);

/* Configure CAN1 RX pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/* Configure CAN2 RX pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* Configure CAN1 TX pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/* Configure CAN2 TX pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* Remap CAN1 and CAN2 GPIOs */
GPIO_PinRemapConfig(GPIO_Remap2_CAN1 , ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_CAN2, ENABLE);

/* Configure CAN1 and CAN2 **************************************************/
/* CAN1 and CAN2 Periph clocks enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1 | RCC_APB1Periph_CAN2, ENABLE);

/* CAN1 and CAN2 register init */
CAN_DeInit(CAN1);
CAN_DeInit(CAN2);

/* Struct init*/
CAN_StructInit(&CAN_InitStructure);

/* CAN1 and CAN2 cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_16tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 1;//2

/*Initializes the CAN1 and CAN2 */
CAN_Init(CAN1, &CAN_InitStructure);
CAN_Init(CAN2, &CAN_InitStructure);


/* CAN1 filter init */
CAN_FilterInitStructure.CAN_FilterNumber = 1;
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=0;//CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);

/* CAN2 filter init */
CAN_FilterInitStructure.CAN_FilterIdHigh =0x2460;
CAN_FilterInitStructure.CAN_FilterNumber = 15;
CAN_FilterInit(&CAN_FilterInitStructure);

/* Transmit */
TxMessage.StdId = 0x01;
TxMessage.ExtId = 0x01;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 8;
}



/**
* @brief Configures the NVIC for CAN.
* @param None
* @retval None
*/
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x1;
NVIC_Init(&NVIC_InitStructure);
}

int main()
{

NVIC_Config();
/* CANs configuration */
CAN_Config();

/* IT Configuration for CAN1 */
CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);

/* IT Configuration for CAN2 */
CAN_ITConfig(CAN2, CAN_IT_FMP0, ENABLE);

while(1)
{
TxMessage.Data[0] = 0x55;
CAN_Transmit(CAN1, &TxMessage);
Delay(1000);

}
}

Сообщение отредактировал IgorKossak - Mar 23 2011, 19:26

Причина редактирования: Оформление кода в [codebox]