@Davaol19 wrote:
But is really difficult to me think that is hardware because i'm sure that it's right, is the same as the CAN1, which works perfectly when alone.
The goal is to confirm if it's a hardware issue or a silicon issue (as you claimed). So this test is important to have come to a clear-cut conclusion: is it an issue in your HW: connections, PCB, the transceiver or something in the MCU..
@Davaol19 wrote:
I've tried to configure only CAN2 and the behavior is the same when connected to CAN1 or CANoe. Are you sure that my code is good? i'm not missing anything?
Here is all the code related to setup CAN2 peripheral:
static void MX_CAN2_Init(void) {
/* USER CODE BEGIN CAN2_Init 0 */
CAN_FilterTypeDef canfilterconfig;
/* USER CODE END CAN2_Init 0 */
/* USER CODE BEGIN CAN2_Init 1 */
/* USER CODE END CAN2_Init 1 */
hcan2.Instance = CAN2;
hcan2.Init.Prescaler = 2;
hcan2.Init.Mode = CAN_MODE_NORMAL;
hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan2.Init.TimeSeg1 = CAN_BS1_13TQ;
hcan2.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan2.Init.TimeTriggeredMode = DISABLE;
hcan2.Init.AutoBusOff = DISABLE;
hcan2.Init.AutoWakeUp = DISABLE;
hcan2.Init.AutoRetransmission = ENABLE;
hcan2.Init.ReceiveFifoLocked = DISABLE;
hcan2.Init.TransmitFifoPriority = ENABLE;
if (HAL_CAN_Init(&hcan2) != HAL_OK) {
Error_Handler();
}
/* USER CODE BEGIN CAN2_Init 2 */
// Configurar la prioridad para CAN2_RX0
canfilterconfig.FilterActivation = CAN_FILTER_ENABLE;
canfilterconfig.FilterBank = 21; // which filter bank to use from the assigned ones
canfilterconfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
canfilterconfig.FilterIdHigh = 0x000 << 5;
canfilterconfig.FilterIdLow = 0;
canfilterconfig.FilterMaskIdHigh = 0x000 << 5;
canfilterconfig.FilterMaskIdLow = 0x0000;
canfilterconfig.FilterMode = CAN_FILTERMODE_IDMASK;
canfilterconfig.FilterScale = CAN_FILTERSCALE_32BIT;
canfilterconfig.SlaveStartFilterBank = 20;
HAL_CAN_ConfigFilter(&hcan2, &canfilterconfig);
/* USER CODE END CAN2_Init 2 */
}
MX_CAN1_Init();
MX_CAN2_Init();
/* USER CODE BEGIN 2 */
HAL_CAN_Start(&hcan1);
HAL_CAN_Start(&hcan2);
HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING);
HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO1_MSG_PENDING);
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hcan->Instance==CAN1)
{
/* USER CODE BEGIN CAN1_MspInit 0 */
/* USER CODE END CAN1_MspInit 0 */
/* Peripheral clock enable */
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOA_CLK_ENABLE();
/**CAN1 GPIO Configuration
PA11 ------> CAN1_RX
PA12 ------> CAN1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* CAN1 interrupt Init */
HAL_NVIC_SetPriority(CAN1_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN1_RX0_IRQn);
/* USER CODE BEGIN CAN1_MspInit 1 */
/* USER CODE END CAN1_MspInit 1 */
}
else if(hcan->Instance==CAN2)
{
/* USER CODE BEGIN CAN2_MspInit 0 */
/* USER CODE END CAN2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_CAN2_CLK_ENABLE();
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOB_CLK_ENABLE();
/**CAN2 GPIO Configuration
PB12 ------> CAN2_RX
PB13 ------> CAN2_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* CAN2 interrupt Init */
HAL_NVIC_SetPriority(CAN2_RX1_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(CAN2_RX1_IRQn);
/* USER CODE BEGIN CAN2_MspInit 1 */
/* USER CODE END CAN2_MspInit 1 */
}
}
Do you think that all the initialitzation is right? I'm not missing anything?
I don't see any issue on your CAN config (unless I missed something), except the fact you are using HSI as clock source for CAN.
Try to decrease BS1 in favor of BS2. BS1=12 and BS2=3.
For the transceiver, you need to review its datasheet.
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