使用冲哥的子午鸳鸯钺，两组CAN进行连接，DEMO使用的函数的例程，对CAN的引脚进行了修改，其他代码没有修改。
目前无法printf。下图为连接方式。
代码如下
- /*---------------------------------------------------------------------*/
- /* --- STC MCU Limited ------------------------------------------------*/
- /* --- STC 1T Series MCU Demo Programme -------------------------------*/
- /* --- Mobile: (86)13922805190 ----------------------------------------*/
- /* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
- /* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/
- /* --- Web: www.STCAI.com ---------------------------------------------*/
- /* --- Web: www.STCMCUDATA.com ---------------------------------------*/
- /* --- BBS: www.STCAIMCU.com -----------------------------------------*/
- /* --- QQ: 800003751 -------------------------------------------------*/
- /* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */
- /*---------------------------------------------------------------------*/
-
- #include "STC32G_CAN.h"
- #include "STC32G_GPIO.h"
- #include "STC32G_NVIC.h"
- #include "STC32G_UART.h"
- #include "STC32G_Timer.h"
- #include "STC32G_Switch.h"
-
- /************* 功能说明 ***************
-
- CAN1、CAN2总线同时使用收发测试用例.
-
- DCAN是一个支持CAN2.0B协议的功能单元。
-
- 收到一帧数据后, 通过串口1（P3.0,P3.1）发送出去，串口参数：115200,N,8,1.
-
- 需要在"STC32G_UART.h"里设置： #define PRINTF_SELECT UART1
-
- MCU每秒钟从CAN1、CAN2发送一帧固定数据，每发一帧ID号加1.
-
- CAN2设置单滤波模式，只接收ID为 0x280~0x2ff 的标准帧报文
-
- 默认CAN总线波特率500KHz, 用户可自行修改.
-
- 下载时, 选择时钟 24MHz (用户可在"config.h"修改频率).
-
- ******************************************/
-
- /************* 本地常量声明 **************/
-
-
- /************* 本地变量声明 **************/
-
- u16 msecond;
-
- /************* 本地函数声明 **************/
-
-
- /************* 外部函数和变量声明 *****************/
-
-
- /******************** IO口配置 ********************/
- void GPIO_config(void)
- {
- P3_MODE_IO_PU(GPIO_Pin_0 | GPIO_Pin_1); //P3.0,P3.1 设置为准双向口
- P0_MODE_IO_PU(GPIO_Pin_LOW); //P0.0~P0.3 设置为准双向口
-
- CAN1_SW(CAN1_P00_P01); //CAN1_P00_P01,CAN1_P50_P51,CAN1_P42_P45,CAN1_P70_P71
- CAN2_SW(CAN2_P02_P03); //CAN2_P02_P03,CAN2_P52_P53,CAN2_P46_P47,CAN2_P72_P73
- }
-
- /************************ 定时器配置 ****************************/
- void Timer_config(void)
- {
- TIM_InitTypeDef TIM_InitStructure; //结构定义
- TIM_InitStructure.TIM_Mode = TIM_16BitAutoReload; //指定工作模式, TIM_16BitAutoReload,TIM_16Bit,TIM_8BitAutoReload,TIM_16BitAutoReloadNoMask
- TIM_InitStructure.TIM_ClkSource = TIM_CLOCK_1T; //指定时钟源, TIM_CLOCK_1T,TIM_CLOCK_12T,TIM_CLOCK_Ext
- TIM_InitStructure.TIM_ClkOut = DISABLE; //是否输出高速脉冲, ENABLE或DISABLE
- TIM_InitStructure.TIM_Value = (u16)(65536UL - (MAIN_Fosc / 1000UL)); //初值, 1秒钟中断1000次
- TIM_InitStructure.TIM_PS = 0; //8位预分频器(n+1), 0~255
- TIM_InitStructure.TIM_Run = ENABLE; //是否初始化后启动定时器, ENABLE或DISABLE
- Timer_Inilize(Timer0,&TIM_InitStructure); //初始化Timer0 Timer0,Timer1,Timer2,Timer3,Timer4
- NVIC_Timer0_Init(ENABLE,Priority_0); //中断使能, ENABLE/DISABLE; 优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
- }
-
- /*************** 串口初始化函数 *****************/
- void UART_config(void)
- {
- COMx_InitDefine COMx_InitStructure; //结构定义
-
- COMx_InitStructure.UART_Mode = UART_8bit_BRTx; //模式, UART_ShiftRight,UART_8bit_BRTx,UART_9bit,UART_9bit_BRTx
- COMx_InitStructure.UART_BRT_Use = BRT_Timer2; //选择波特率发生器, BRT_Timer2 (注意: 串口2固定使用BRT_Timer2, 所以不用选择)
- COMx_InitStructure.UART_BaudRate = 115200ul; //波特率, 110 ~ 115200
- COMx_InitStructure.UART_RxEnable = ENABLE; //接收允许, ENABLE或DISABLE
- UART_Configuration(UART1, &COMx_InitStructure); //初始化串口 USART1,USART2,USART3,USART4
- NVIC_UART1_Init(ENABLE,Priority_1); //中断使能, ENABLE/DISABLE; 优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
-
- UART1_SW(UART1_SW_P30_P31); //UART1_SW_P30_P31,UART1_SW_P36_P37,UART1_SW_P16_P17,UART1_SW_P43_P44
- }
-
- /******************** CAN 配置 ********************/
- void CAN_config(void)
- {
- CAN_InitTypeDef CAN_InitStructure; //结构定义
-
- CAN_InitStructure.CAN_Enable = ENABLE; //CAN功能使能 ENABLE或DISABLE
- CAN_InitStructure.CAN_IMR = CAN_ALLIM; //CAN中断寄存器 CAN_DOIM,CAN_BEIM,CAN_TIM,CAN_RIM,CAN_EPIM,CAN_EWIM,CAN_ALIM,CAN_ALLIM,DISABLE
- CAN_InitStructure.CAN_SJW = 0; //重新同步跳跃宽度 0~3
- CAN_InitStructure.CAN_SAM = 0; //总线电平采样次数 0:采样1次; 1:采样3次
-
- //CAN总线波特率=Fclk/((1+(TSG1+1)+(TSG2+1))*(BRP+1)*2)
- CAN_InitStructure.CAN_TSG1 = 2; //同步采样段1 0~15
- CAN_InitStructure.CAN_TSG2 = 1; //同步采样段2 1~7 (TSG2 不能设置为0)
- CAN_InitStructure.CAN_BRP = 3; //波特率分频系数 0~63
- //24000000/((1+3+2)*4*2)=500KHz
-
- CAN_InitStructure.CAN_ListenOnly = DISABLE; //Listen Only模式 ENABLE,DISABLE
- CAN_InitStructure.CAN_Filter = SINGLE_FILTER;//滤波选择 DUAL_FILTER(双滤波),SINGLE_FILTER(单滤波)
- CAN_InitStructure.CAN_ACR0 = 0x00; //总线验收代码寄存器 0~0xFF
- CAN_InitStructure.CAN_ACR1 = 0x00;
- CAN_InitStructure.CAN_ACR2 = 0x00;
- CAN_InitStructure.CAN_ACR3 = 0x00;
- CAN_InitStructure.CAN_AMR0 = 0xff; //总线验收屏蔽寄存器 0~0xFF
- CAN_InitStructure.CAN_AMR1 = 0xff;
- CAN_InitStructure.CAN_AMR2 = 0xff;
- CAN_InitStructure.CAN_AMR3 = 0xff;
- CAN_Inilize(CAN1,&CAN_InitStructure); //CAN1 初始化
-
- //只接收 ID 为 0x280 ~ 0x2ff 的标准帧报文
- CAN_InitStructure.CAN_ACR0 = 0x50; //总线验收代码寄存器 0~0xFF
- CAN_InitStructure.CAN_ACR1 = 0x00;
- CAN_InitStructure.CAN_ACR2 = 0x00;
- CAN_InitStructure.CAN_ACR3 = 0x00;
- CAN_InitStructure.CAN_AMR0 = 0x0f; //总线验收屏蔽寄存器 0~0xFF
- CAN_InitStructure.CAN_AMR1 = 0xef;
- CAN_InitStructure.CAN_AMR2 = 0xff;
- CAN_InitStructure.CAN_AMR3 = 0xff;
- CAN_Inilize(CAN2,&CAN_InitStructure); //CAN2 初始化
-
- NVIC_CAN_Init(CAN1,ENABLE,Priority_1); //中断使能, CAN1/CAN2; ENABLE/DISABLE; 优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
- NVIC_CAN_Init(CAN2,ENABLE,Priority_1); //中断使能, CAN1/CAN2; ENABLE/DISABLE; 优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
- }
-
- /**********************************************/
- void main(void)
- {
- u8 n,i,j;
- u8 sr;
-
- WTST = 0; //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
- EAXSFR(); //扩展SFR(XFR)访问使能
- CKCON = 0; //提高访问XRAM速度
-
- GPIO_config();
- Timer_config();
- UART_config();
- CAN_config();
- EA = 1;
- //====初始化数据=====
- CAN1_Tx.FF = STANDARD_FRAME; //标准帧
- CAN1_Tx.RTR = 0; //0：数据帧，1：远程帧
- CAN1_Tx.DLC = 0x08; //数据长度
- // CAN1_Tx.ID = 0x02f8; //CAN ID
- CAN1_Tx.ID = 0x0278; //CAN ID
- CAN1_Tx.DataBuffer[0] = 0x11; //数据内容
- CAN1_Tx.DataBuffer[1] = 0x12;
- CAN1_Tx.DataBuffer[2] = 0x13;
- CAN1_Tx.DataBuffer[3] = 0x14;
- CAN1_Tx.DataBuffer[4] = 0x15;
- CAN1_Tx.DataBuffer[5] = 0x16;
- CAN1_Tx.DataBuffer[6] = 0x17;
- CAN1_Tx.DataBuffer[7] = 0x18;
-
- CAN2_Tx.FF = EXTENDED_FRAME; //扩展帧
- CAN2_Tx.RTR = 0; //0：数据帧，1：远程帧
- CAN2_Tx.DLC = 0x08; //数据长度
- CAN2_Tx.ID = 0x03456789; //CAN ID
- CAN2_Tx.DataBuffer[0] = 0x21; //数据内容
- CAN2_Tx.DataBuffer[1] = 0x22;
- CAN2_Tx.DataBuffer[2] = 0x23;
- CAN2_Tx.DataBuffer[3] = 0x24;
- CAN2_Tx.DataBuffer[4] = 0x25;
- CAN2_Tx.DataBuffer[5] = 0x26;
- CAN2_Tx.DataBuffer[6] = 0x27;
- CAN2_Tx.DataBuffer[7] = 0x28;
-
- while (1)
- {
- if(T0_1ms)
- {
- T0_1ms = 0;
- //------------------处理CAN1模块-----------------------
- if(++msecond >= 1000) //1秒到
- {
- msecond = 0;
-
- CANSEL = CAN1; //选择CAN1模块
- sr = CanReadReg(SR);
-
- if(sr & 0x01) //判断是否有 BS:BUS-OFF状态
- {
- CANAR = MR;
- CANDR &= ~0x04; //清除 Reset Mode, 从BUS-OFF状态退出
- }
- else
- {
- CanSendMsg(&CAN1_Tx); //发送一帧数据
- CAN1_Tx.ID += 0x01; //CAN ID
- }
-
- // //------------------处理CAN2模块-----------------------
- CANSEL = CAN2; //选择CAN2模块
- sr = CanReadReg(SR);
-
- if(sr & 0x01) //判断是否有 BS:BUS-OFF状态
- {
- CANAR = MR;
- CANDR &= ~0x04; //清除 Reset Mode, 从BUS-OFF状态退出
- }
- else
- {
- CanSendMsg(&CAN2_Tx); //发送一帧数据
- CAN2_Tx.ID += 0x0001; //CAN ID
- }
- }
- }
-
- if(B_Can1Read) //判断 CAN1 是否接收到数据
- {
- B_Can1Read = 0;
-
- CANSEL = CAN1; //选择CAN1模块
- n = CanReadMsg(CAN1_Rx); //读取接收内容
- if(n>0)
- {
- for(i=0;i<n;i++)
- {
- // CanSendMsg(&CAN1_Rx[i]); //CAN总线原样返回
- printf("CAN1 ID=0x%08lX DLC=%d FF=%d RTR=%d ",CAN1_Rx[i].ID,CAN1_Rx[i].DLC,CAN1_Rx[i].FF,CAN1_Rx[i].RTR); //串口打印帧信息
- for(j=0;j<CAN1_Rx[i].DLC;j++)
- {
- printf("0x%02X ",CAN1_Rx[i].DataBuffer[j]); //从串口输出收到的数据
- }
- printf("\r\n");
- }
- }
- }
-
- if(B_Can2Read) //判断 CAN2 是否接收到数据
- {
- B_Can2Read = 0;
-
- CANSEL = CAN2; //选择CAN2模块
- n = CanReadMsg(CAN2_Rx); //读取接收内容
- if(n>0)
- {
- for(i=0;i<n;i++)
- {
- // CanSendMsg(&CAN2_Rx[i]); //CAN总线原样返回
- printf("CAN2 ID=0x%08lX DLC=%d FF=%d RTR=%d ",CAN2_Rx[i].ID,CAN2_Rx[i].DLC,CAN2_Rx[i].FF,CAN2_Rx[i].RTR); //串口打印帧信息
- for(j=0;j<CAN2_Rx[i].DLC;j++)
- {
- printf("0x%02X ",CAN2_Rx[i].DataBuffer[j]); //从串口输出收到的数据
- }
- printf("\r\n");
- }
- }
- }
- }
- }
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发表于 2023-12-9 15:24:14
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