stm32 CAN 总线例子 利用stm32实现了1个简单的 CAN 功能，使用了队列缓存 can.c 文件 #include "includes.h" #define GPIO_CAN GPIOB #define RCC_APB2Periph_GPIO_CAN RCC_APB2Periph_GPIOB #define GPIO_Pin_RX GPIO_Pin_8 #define GPIO_Pin_TX GPIO_Pin_9 #define GPIO_Remap_CAN GPIO_Remap1_CAN1 #define MAX_MAIL_NUM 3 static u8 CAN_msg_num[MAX_MAIL_NUM]; // 发送邮箱标记 // /** * @brief Configures the CAN, transmit and receive by polling * @param None * @retval : PASSED if the reception is well done, FAILED in other case */ void CAN_config_init(void) { CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure; /* CAN register init */ CAN_DeInit(CAN1); CAN_StructInit(&CAN_InitStructure); /* CAN cell init */ // 36M 250k 速率 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_BS1=CAN_BS1_12tq; CAN_InitStructure.CAN_BS2=CAN_BS2_3tq; CAN_InitStructure.CAN_Prescaler=9; 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_FilterInit(&CAN_FilterInitStructure); } void CAN_init(void) { NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; // 首先打开电源及时钟 /* GPIO for CAN and G...
