Posted on September 26, 2017 at 08:23
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 STM32F103 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);
#can-stm32f407 #can-communitation #can
