Posted on July 04, 2013 at 15:18Hi,
I work with an STM32F405 and i cannot use the CAN2.
Now, I do some tests on the discovery board on an STM32F407. And with the same code developed for CAN2 used with CAN1 all seems good.
I think, that I have forgotten something, but what?
This is my can configuration :
static void CAN_Configuration( void )
{
RCC_APB1PeriphClockCmd( RCC_APB1Periph_CAN2, ENABLE );
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
// CAN register init
CAN_DeInit( CAN2 );
CAN_StructInit( &CAN_InitStructure );
// CAN cell init
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = ENABLE;
CAN_InitStructure.CAN_AWUM = ENABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_LoopBack; /* todo CAN_Mode_Normal */
// CAN Baudrate = 175kbps (CAN clocked at 42 MHz)
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 16u;
CAN_Init( CAN2, &CAN_InitStructure );
// Activate CAN in debug mode
CAN_DBGFreeze( CAN2, DISABLE );
// CAN filter init
CAN_FilterInitStructure.CAN_FilterNumber = 0u;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000u;
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000u;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000u;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000u;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0u;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit( &CAN_FilterInitStructure );
}
#can #problem #stm32f4
