Posted on September 08, 2016 at 16:57Hello,
I am trying to send 1000 values from data stored in DMA on to CAN Bus. i am using the Data frame(8 bits each) of CAN to transmit data but i am not able to receive all the data frames. i am not able to understand what is the problem . i am using HAL Library and STM32F4_Discovery board. Have attached the CAN related code.
uint16_t IT_buffer[1000]; // buffer storing 1000 values
/*CAN Transmit*/
void CAN_Tx(void)
{
volatile int j=0;
volatile int b=0;
for(j=0;j<250;j++) // each time 4values out of 1000values are send therefore 1000/4=250
{
//♯♯-3- Start the Transmission process ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯
CanHandle.pTxMsg->StdId = 0x123;
CanHandle.pTxMsg->RTR = CAN_RTR_DATA;
CanHandle.pTxMsg->IDE = CAN_ID_STD;
CanHandle.pTxMsg->DLC = 8;
CanHandle.pTxMsg->Data[0] = (IT_buffer[b] >> 8);
CanHandle.pTxMsg->Data[1] = (IT_buffer[b]);
CanHandle.pTxMsg->Data[2] = (IT_buffer[b+1] >> 8);
CanHandle.pTxMsg->Data[3] = (IT_buffer[b+1]);
CanHandle.pTxMsg->Data[4] = (IT_buffer[b+2] >> 8);
CanHandle.pTxMsg->Data[5] = (IT_buffer[b+2]);
CanHandle.pTxMsg->Data[6] = (IT_buffer[b+3] >> 8);
CanHandle.pTxMsg->Data[7] = (IT_buffer[b+3]);
TransmitMailbox = HAL_CAN_Transmit(&CanHandle, 30);
b=b+4;
}
}
/* CAN1 init function */
void MX_CAN1_Init(void)
{
HAL_CAN_DeInit(&CanHandle);
static CanTxMsgTypeDef TxMessage;
static CanRxMsgTypeDef RxMessage;
/*♯♯-1- Configure the CAN peripheral ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
/*Baurd rate defined at 1Mhz */
CanHandle.Instance = CAN1;
CanHandle.pTxMsg = &TxMessage;
CanHandle.pRxMsg = &RxMessage;
CanHandle.Init.TTCM = DISABLE;
CanHandle.Init.ABOM = DISABLE;
CanHandle.Init.AWUM = DISABLE;
CanHandle.Init.NART = DISABLE;
CanHandle.Init.RFLM = DISABLE;
CanHandle.Init.TXFP = DISABLE;
CanHandle.Init.Mode = CAN_MODE_NORMAL;
/* CAN Baudrate = 175kbps (CAN clocked at 42 MHz) */
CanHandle.Init.SJW = CAN_SJW_1TQ;
CanHandle.Init.BS1 = CAN_BS1_6TQ;
CanHandle.Init.BS2 = CAN_BS2_8TQ;
CanHandle.Init.Prescaler = 16;
HAL_CAN_Init(&CanHandle);
}
/*CAN1 filter function*/
void CAN_filter_init(void)
{
CAN_FilterConfTypeDef sFilterConfig;
/*♯♯-2- Configure the CAN Filter ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
sFilterConfig.FilterNumber = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = 0x0000;//0x100 << 5;;
sFilterConfig.FilterIdLow = 0x0000;
sFilterConfig.FilterMaskIdHigh = 0x0000;//0x700 << 5;
sFilterConfig.FilterMaskIdLow = 0x0000;
sFilterConfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
sFilterConfig.FilterActivation = ENABLE;
sFilterConfig.BankNumber =14;
HAL_CAN_ConfigFilter(&CanHandle, &sFilterConfig);
}
can any one help me please!!!
#stm32 #hal #can #cubemx #canbus
