【MM32 eMiniBoard测评报告】+CAN通讯的问题
今天捣鼓了一下CAN通讯，没搞好。一开始用示波器测波形，CAN发送腿上有波形，后来没了。
程序：
int main(void)
{
u8 i = 0;
delay_init();
uart_initwBaudRate(115200); //串口初始化为115200
CANM_Init();
CAN_Config(CAN_250K,ExtendedFrame_DoubleFilter,0x172,0x325,0xFF,0xFF); //CAN验收屏蔽寄存器所有位被置为相关，即只可接受验收代码寄存器中的两个CAN_ID
//CAN_Config(CAN_250K,ExtendedFrame_DoubleFilter,0x172,0x325,0xFF,0xFF); //CAN验收屏蔽寄存器所有位被置为相关，即只可接受验收代码寄存器中的两个CAN_ID
while(1)
{
// if(flag)
// {
// flag = 0;
// printf("CANID:0x%xData",CanPeliRxMsgStructure.ID); //串口打印
// for(i=0;i<8;i++)
// {
// printf("%x",CanPeliRxMsgStructure.Data); //打印CAN报文内容
// }
// printf("\r\n"); //换行
// }
Send_CANFrame(&CAN_TX_Config); //发送一帧CAN数据
delay_ms(30);
}
}
void CANM_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#if 1
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_8; //CAN RX PB8
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_9; //CAN TX PB9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_4);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_4);
#else
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_11; //CAN RX PA11
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_12; //CAN TX PA12
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_4);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource12, GPIO_AF_4);
#endif
//NVIC配置
NVIC_InitStructure.NVIC_IRQChannel = CAN_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/********************************************************************************************************
**函数信息 ：void CAN_Config(u32 CAN_Pre,CAN_Mode ID,u32 idCode1,u32 idCode2,u32 mask1,u32 mask2)
**功能描述 ：CAN配置
**输入参数 ：CAN_Pre:CAN通信速率
CAN_250KCAN_500K
fMode:CAN通信模式
StandardFrame_SingleFilter=0:标准帧，单滤波器模式
StandardFrame_SingleFilter=1:扩展帧，单滤波器模式
ExtendedFrame_SingleFilter=2:标准帧，双滤波器模式
ExtendedFrame_DoubleFilter=3:扩展帧，双滤波器模式
idCode1：验收代码1
idCode2：验收代码2
mask1：验收代码屏蔽位1
mask2：验收代码屏蔽位2
**输出参数 ：None
** 备注 ：
********************************************************************************************************/
void CAN_Config(u32 CAN_Pre,CAN_Mode ID,u32 idCode1,u32 idCode2,u32 mask1,u32 mask2)
{
CAN_Peli_InitTypeDef CAN_Peli_InitStructure;
RCC_ClocksTypeDef RCC_Clocks;
u32 idCodeTemp1,idMaskTemp1;
u32 idCodeTemp2,idMaskTemp2;
CAN_Peli_FilterInitTypeDef CAN_Peli_FilterInitStructure;
CAN_ResetMode_Cmd(CAN1,ENABLE);// 进入复位模式
CAN_Mode_Cmd(CAN1, CAN_PELIMode);//CAN进入Peli模式
RCC_GetClocksFreq(&RCC_Clocks);
CAN_Peli_StructInit(&CAN_Peli_InitStructure);
CAN_AutoCfg_BaudParam( &CAN_Peli_InitStructure, RCC_Clocks.PCLK1_Frequency, CAN_Pre);
CAN_Peli_InitStructure.SAM = RESET;//采样点
//CAN_Peli_InitStructure.STM = DISABLE;//DISABLE;//自测模式
CAN_Peli_InitStructure.STM = ENABLE;//DISABLE;//自测模式
//CAN_Peli_InitStructure.LOM = DISABLE;//只听模式
CAN_Peli_InitStructure.LOM = ENABLE;//只听模式
CAN_Peli_InitStructure.EWLR = 0x96;
CAN_Peli_Init(&CAN_Peli_InitStructure);
switch(ID)
{
case StandardFrame_SingleFilter:
idCodeTemp1 = idCode1<<(3 + 18);
idMaskTemp1 = mask1<<(3 + 18);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Singal;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp1>>8)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp1>>0)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff)|0x1f;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = ((idMaskTemp1>>8)&0xff)|0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp1>>0)&0xff)|0xff;
break;
case ExtendedFrame_SingleFilter:
idCodeTemp1 = idCode1<<3;
idMaskTemp1 = mask1<<3;
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Singal;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp1>>8)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = idCodeTemp1&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff);
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = ((idMaskTemp1>>8)&0xff);
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp1>>0)&0xff);
break;
case StandardFrame_DoubleFilter:
idCodeTemp1 = idCode1<<(3 + 18);
idMaskTemp1 = mask1<<(3 + 18);
idCodeTemp2 = idCode2<<(3 + 18);
idMaskTemp2 = mask2<<(3 + 18);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Double;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp2>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff)|0x1f;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = (idMaskTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp2>>16)&0xff)|0x1f;
break;
case ExtendedFrame_DoubleFilter:
idCodeTemp1 = idCode1<<(3);
idMaskTemp1 = mask1<<(3);
idCodeTemp2 = idCode2<<(3);
idMaskTemp2 = mask2<<(3);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Double;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp2>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = (idMaskTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = (idMaskTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = (idMaskTemp2>>16)&0xff;
break;
default:
break;
}
CAN_Peli_FilterInit(&CAN_Peli_FilterInitStructure);
//CAN_Peli_ITConfig(CAN_IT_RI,ENABLE);
//CAN_Peli_ITConfig(CAN_IT_TI,ENABLE);
CAN_Peli_ITConfig(CAN_IT_ALL,ENABLE);
CAN_ResetMode_Cmd(CAN1,DISABLE);//退出复位模式,进入工作模式
}
各位看看，有什么错误？
另外，发送接收腿都倒换着接了。谢谢！
SW2转换开关注意一下 coslight 发表于 2020-5-8 08:24
SW2转换开关注意一下
拨到正确位置了 Cjy_JDxy 发表于 2020-5-8 08:26
拨到正确位置了
我的板子是拨到位置也连不上，后来干脆焊死，就好了
到断点了。
接收不成功。
配置如下：
void CAN_Config(u32 CAN_Pre,CAN_Mode ID,u32 idCode1,u32 idCode2,u32 mask1,u32 mask2)
{
CAN_Peli_InitTypeDef CAN_Peli_InitStructure;
RCC_ClocksTypeDef RCC_Clocks;
u32 idCodeTemp1,idMaskTemp1;
u32 idCodeTemp2,idMaskTemp2;
CAN_Peli_FilterInitTypeDef CAN_Peli_FilterInitStructure;
CAN_ResetMode_Cmd(CAN1,ENABLE);// ½øÈ븴λģʽ
CAN_Mode_Cmd(CAN1, CAN_PELIMode);//CAN½øÈëPeliģʽ
RCC_GetClocksFreq(&RCC_Clocks);
CAN_Peli_StructInit(&CAN_Peli_InitStructure);
CAN_AutoCfg_BaudParam( &CAN_Peli_InitStructure, RCC_Clocks.PCLK1_Frequency, CAN_Pre);
CAN_Peli_InitStructure.SAM = RESET;//²ÉÑùµã
CAN_Peli_InitStructure.STM = ENABLE;//DISABLE;//×Ô²âģʽ
CAN_Peli_InitStructure.LOM = DISABLE;//Ö»Ìýģʽ
// CAN_Peli_InitStructure.EWLR = 0x96;
CAN_Peli_Init(&CAN_Peli_InitStructure);
switch(ID)
{
case StandardFrame_SingleFilter:
idCodeTemp1 = idCode1<<(3 + 18);
idMaskTemp1 = mask1<<(3 + 18);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Singal;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp1>>8)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp1>>0)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff)|0x1f;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = ((idMaskTemp1>>8)&0xff)|0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp1>>0)&0xff)|0xff;
break;
case ExtendedFrame_SingleFilter:
idCodeTemp1 = idCode1<<3;
idMaskTemp1 = mask1<<3;
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Singal;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp1>>8)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = idCodeTemp1&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff);
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = ((idMaskTemp1>>8)&0xff);
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp1>>0)&0xff);
break;
case StandardFrame_DoubleFilter:
idCodeTemp1 = idCode1<<(3 + 18);
idMaskTemp1 = mask1<<(3 + 18);
idCodeTemp2 = idCode2<<(3 + 18);
idMaskTemp2 = mask2<<(3 + 18);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Double;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp2>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = ((idMaskTemp1>>16)&0xff)|0x1f;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = (idMaskTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = ((idMaskTemp2>>16)&0xff)|0x1f;
break;
case ExtendedFrame_DoubleFilter:
idCodeTemp1 = idCode1<<(3);
idMaskTemp1 = mask1<<(3);
idCodeTemp2 = idCode2<<(3);
idMaskTemp2 = mask2<<(3);
CAN_Peli_FilterInitStructure.AFM = CAN_FilterMode_Double;
CAN_Peli_FilterInitStructure.CAN_FilterId0 = (idCodeTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId1 = (idCodeTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId2 = (idCodeTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterId3 = (idCodeTemp2>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId0 = (idMaskTemp1>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId1 = (idMaskTemp1>>16)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId2 = (idMaskTemp2>>24)&0xff;
CAN_Peli_FilterInitStructure.CAN_FilterMaskId3 = (idMaskTemp2>>16)&0xff;
break;
default:
break;
}
CAN_Peli_FilterInit(&CAN_Peli_FilterInitStructure);
CAN_Peli_ITConfig(CAN_IT_ALL,ENABLE);
CAN_ResetMode_Cmd(CAN1,DISABLE);//Í˳ö¸´Î»Ä£Ê½,½øÈ빤×÷ģʽ
}
Cjy_JDxy 发表于 2020-5-8 16:41
到断点了。
接收不成功。
回环模式呢 ningling_21 发表于 2020-5-8 22:22
回环模式呢
回环模式也不行 Cjy_JDxy 发表于 2020-5-9 07:59
回环模式也不行
应该是程序问题 ningling_21 发表于 2020-5-9 08:11
应该是程序问题
可是我不知道哪儿有问题 我用得mm32 官方例程，也接收不到数据，can接收中断也不行，没反应。 你们有解决么 CAN接口与CAN工具连接的CAN_H和CAN_L调换一下试试呢 can总线的可靠通信是依靠什么机制来实现的? 怎么实现一对一通讯的 can通讯电路上面的电压值范围是多少呢? canopen通讯和CAN通讯有什么不同吗? 试试回环 canbus的通讯波特率可以被设为是多少呢? can线的通讯速率范围是多少 can通讯可以并联吗 can总线的可靠通信是依靠什么机制来实现的?
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