I am wondering if anyone is familiar with any STM32f407VG micro-controllers?
If so, I am having some problems configuring a CAN driver.
I can run the demo code, which is set to a loop-back mode, but I cannot get
normal mode to work.
I think message is not going out of the transmit mailbox. Status is going to pending all the time.
I read through all the data sheets, and everything is configured correctly except the INAK in the CAN_MSR register never resets to 0. I can provide more detail if needed, but first I need to know if there is someone who has worked with a STM32F4 microcontroller and CAN messages.
Here is my sample code:
RCC_APB1PeriphClockCmd(CAN_CLK, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_PinAFConfig(CAN_GPIO_PORT, CAN_RX_SOURCE, CAN_AF_PORT);
GPIO_PinAFConfig(CAN_GPIO_PORT, CAN_TX_SOURCE, CAN_AF_PORT);
/* Configure CAN RX and TX pins */
GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN | CAN_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(CAN_GPIO_PORT, &GPIO_InitStructure);
CAN_DeInit(CANx);
CAN_StructInit(&CAN_InitStructure);
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 = DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
/* CAN Baudrate = 1 MBps (CAN clocked at 30 MHz) */
CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 2;
CAN_Init(CANx, &CAN_InitStructure);
/************transmit message config***********/
TxMessage.StdId = 0x11;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 2;
TxMessage.Data[0] = 0xCA;
TxMessage.Data[1] = 0xFE;
CAN_Transmit(CANx, &TxMessage);
uwCounter = 0;
while(( CAN_TransmitStatus(CANx, TransmitMailbox) != CANTXOK) && (uwCounter != 0xFFFF))
{
uwCounter++;
}
uwCounter = 0;
while((CAN_MessagePending(CANx, CAN_FIFO0) < 1) && (uwCounter != 0xFFFF))
{
uwCounter++;
}
k = CAN_TransmitStatus(CANx, i);