Posted on October 03, 2017 at 16:33I 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.
♯ include 'stm32f4xx.h'
♯ include <stdlib.h>
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
CanTxMsg TxMessage;
int mailboxstatus,k,uwCounter,intistatusview;
int TransmitMailbox;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
void CAN1_Config(void);
void CAN2_Config(void);
void NVIC_Config(void);
RCC_ClocksTypeDef RCC_Clocks;
void Can1WriteData(uint16_t ID);
void Can2WriteData(uint16_t ID);
void INTTIM_Config(void);
int main(void)
{
//INTTIM_Config();
SystemInit();
RCC_GetClocksFreq(&RCC_Clocks);
CAN1_Config();
NVIC_Config();
// CAN_FIFORelease( CAN1,CAN_FIFO0 );
while(1)
{
if( CAN_MessagePending( CAN1,CAN_FIFO0))
{
}
for(int y=0;y<0xffffff;y++);
for(int y=0;y<0xffffff;y++);
Can1WriteData(0x123);
}
}
void CAN1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_CAN1);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_CAN1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
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(GPIOD, &GPIO_InitStructure);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
CAN_DeInit(CAN1);
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_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
CAN_InitStructure.CAN_Prescaler = 2;
CAN_Init(CAN1, &CAN_InitStructure);
/* CAN filter init */
CAN_FilterInitStructure.CAN_FilterNumber = 0;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInitStructure.CAN_FilterNumber = 0;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
TxMessage.StdId = 0x123;
TxMessage.ExtId = 0x01;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 8;
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Can1WriteData(uint16_t ID)
{
CanTxMsg TxMessage;
unsigned int i;
TxMessage.StdId = ID;
TxMessage.ExtId = 0x00;
TxMessage.DLC = 8;
TxMessage.Data[0] = 0x02;
TxMessage.Data[1] = 0x11;
TxMessage.Data[2] = 0x11;
TxMessage.Data[3] = 0x11;
TxMessage.Data[4] = 0x11;
TxMessage.Data[5] = 0x11;
TxMessage.Data[6] = 0x11;
TxMessage.Data[7] = 0x11;
mailboxstatus = CAN_Transmit(CAN1,&TxMessage);
for(i=0;i<0x00ffff;i++);
while(( CAN_TransmitStatus( CAN1, mailboxstatus ))!=CAN_TxStatus_Ok);
k= CAN_TransmitStatus(CAN1, mailboxstatus);
}
void INTTIM_Config(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 41999;
TIM_TimeBaseStructure.TIM_Prescaler =1;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_Cmd(TIM2, ENABLE);
}
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
