#include "can.h"
#include "stm32f10x_can.h"
unsigned int CAN_ID;
unsigned char CAN_DATA0=0,CAN_DATA1=0,CAN_DATA2=0,CAN_DATA3=0,CAN_DATA4=0,CAN_DATA5=0,CAN_DATA6=0,CAN_DATA7=0;
unsigned char CanFlag,Display;
//extern void GPIO_Configuration(void);
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* CAN Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap1_CAN1,ENABLE);
/* Configure CAN pin : RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure CAN pin: TX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable CAN1 RX0 interrupt IRQ channel */
NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void CAN_Configuration(void)
{
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
NVIC_Configuration();
GPIO_Configuration();
/* CAN register init */
CAN_DeInit(CAN1);
CAN_StructInit(&CAN_InitStructure);
/* CAN cell init */
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 = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_4tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
CAN_InitStructure.CAN_Prescaler = 45;
if (CAN_Init(CAN1,&CAN_InitStructure) == CANINITFAILED)
{
}
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_ITConfig(CAN1,CAN_IT_FMP0, ENABLE);
CAN_FilterInit(&CAN_FilterInitStructure);
}
void CANWriteData(unsigned int ID)
{
CanTxMsg TxMessage;
TxMessage.StdId = ID;
//TxMessage.ExtId = 0x00; //ÉèÖÃÀ©Õ¹id À©Õ¹id¹²18λ
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 8;
TxMessage.Data[0] = CAN_DATA0;
TxMessage.Data[1] = CAN_DATA1;
TxMessage.Data[2] = CAN_DATA2;
TxMessage.Data[3] = CAN_DATA3;
TxMessage.Data[4] = CAN_DATA4;
TxMessage.Data[5] = CAN_DATA5;
TxMessage.Data[6] = CAN_DATA6;
TxMessage.Data[7] = CAN_DATA7;
CAN_Transmit(CAN1,&TxMessage);
}
void USB_LP_CAN1_RX0_IRQHandler(void)
{
CanRxMsg RxMessage;
CAN_Receive(CAN1,CAN_FIFO0, &RxMessage);
CAN_ID=RxMessage.StdId;
CAN_DATA0=RxMessage.Data[0];
CAN_DATA1=RxMessage.Data[1];
CAN_DATA2=RxMessage.Data[2];
CAN_DATA3=RxMessage.Data[3];
CAN_DATA4=RxMessage.Data[4];
CAN_DATA5=RxMessage.Data[5];
CAN_DATA6=RxMessage.Data[6];
CAN_DATA7=RxMessage.Data[7];
CAN_ClearITPendingBit(CAN1,CAN_IT_FMP0);
CanFlag = ENABLE;
}
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