CUBEMX使用CAN1收发正常,CAN2发送只有一小段波形并且只有上电后一次有

Valar Morghulis

芯片:STM32F429IGTx

开发板:野火挑战者F429开发板

开发环境:KEIL 5.24.2

CUBEMX库:STM32F4 1.16.0

现象:配置的CAN1可以和周立功的USBCAN-I-MINI进行正常的收发,CAN2在发送的时候只有很短的一小段波形,而且只在上电后第一次发送有波形,后边在怎么发送都没有波形(通过示波器直接观察PB13引脚).两个CAN外设波特率设置都是500k.

1. CAN_FilterConfTypeDef sFilterConfig;
   
2. static CanTxMsgTypeDef TxMessage1;
   
3. static CanRxMsgTypeDef RxMessage1;
   
4. static CanTxMsgTypeDef TxMessage2;
   
5. static CanRxMsgTypeDef RxMessage2;
   
6. void MX_CAN1_Init(void)
   
7. {
   
8. 
   
9.   hcan1.Instance = CAN1;
   
10.   hcan1.Init.Prescaler = 10;
    
11.   hcan1.Init.Mode = CAN_MODE_NORMAL;
    
12.   hcan1.Init.SJW = CAN_SJW_2TQ;
    
13.   hcan1.Init.BS1 = CAN_BS1_5TQ;
    
14.   hcan1.Init.BS2 = CAN_BS2_3TQ;
    
15.   hcan1.Init.TTCM = DISABLE;
    
16.   hcan1.Init.ABOM = DISABLE;
    
17.   hcan1.Init.AWUM = DISABLE;
    
18.   hcan1.Init.NART = DISABLE;
    
19.   hcan1.Init.RFLM = DISABLE;
    
20.   hcan1.Init.TXFP = DISABLE;
    
21.   if (HAL_CAN_Init(&hcan1) != HAL_OK)
    
22.   {
    
23.     _Error_Handler(__FILE__, __LINE__);
    
24.   }
    
25. 
    
26. }
    
27. /* CAN2 init function */
    
28. void MX_CAN2_Init(void)
    
29. {
    
30. 
    
31.   hcan2.Instance = CAN2;
    
32.   hcan2.Init.Prescaler = 10;
    
33.   hcan2.Init.Mode = CAN_MODE_NORMAL;
    
34.   hcan2.Init.SJW = CAN_SJW_2TQ;
    
35.   hcan2.Init.BS1 = CAN_BS1_5TQ;
    
36.   hcan2.Init.BS2 = CAN_BS2_3TQ;
    
37.   hcan2.Init.TTCM = DISABLE;
    
38.   hcan2.Init.ABOM = DISABLE;
    
39.   hcan2.Init.AWUM = DISABLE;
    
40.   hcan2.Init.NART = DISABLE;
    
41.   hcan2.Init.RFLM = DISABLE;
    
42.   hcan2.Init.TXFP = DISABLE;
    
43.   if (HAL_CAN_Init(&hcan2) != HAL_OK)
    
44.   {
    
45.     _Error_Handler(__FILE__, __LINE__);
    
46.   }
    
47. 
    
48. }
    
49. 
    
50. hcan1.pTxMsg = &TxMessage1;
    
51. hcan1.pRxMsg = &RxMessage1;
    
52. hcan2.pTxMsg = &TxMessage2;
    
53. hcan2.pRxMsg = &RxMessage2;
    
54. 
    
55. sFilterConfig.FilterNumber = 0;
    
56.   sFilterConfig.FilterMode = CAN_FILTERMODE_IDLIST;
    
57.   sFilterConfig.FilterScale = CAN_FILTERSCALE_16BIT;
    
58.   sFilterConfig.FilterIdHigh = (uint32_t)0x0123<<5;
    
59.   sFilterConfig.FilterIdLow = CAN_ID_STD;
    
60.   sFilterConfig.FilterMaskIdHigh = 0xFFFF;
    
61.   sFilterConfig.FilterMaskIdLow = 0xFFFF;
    
62.   sFilterConfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
    
63.   sFilterConfig.FilterActivation = ENABLE;
    
64.   sFilterConfig.BankNumber = 14;
    
65.    
    
66.   if(HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig) != HAL_OK)
    
67.   {
    
68.         DEBUG("HAL_CAN_ConfigFilter ERR\r\n");
    
69.   }
    
70. 
    
71.     sFilterConfig.FilterNumber = 14;
    
72.     sFilterConfig.FilterFIFOAssignment = CAN_FILTER_FIFO1;
    
73.      
    
74.     if(HAL_CAN_ConfigFilter(&hcan2, &sFilterConfig) != HAL_OK)
    
75.   {
    
76.         DEBUG("HAL_CAN_ConfigFilter ERR\r\n");
    
77.   }
    
78.      
    
79.   hcan1.pTxMsg->StdId = 0x123;
    
80.   hcan1.pTxMsg->RTR = CAN_RTR_DATA;
    
81.   hcan1.pTxMsg->IDE = CAN_ID_STD;
    
82.   hcan1.pTxMsg->DLC = 8;
    
83.     hcan1.pTxMsg->Data[0] = 0x01;
    
84.     hcan1.pTxMsg->Data[1] = 0x02;
    
85.     hcan1.pTxMsg->Data[2] = 0x03;
    
86.     hcan1.pTxMsg->Data[3] = 0x04;
    
87.     hcan1.pTxMsg->Data[4] = 0x05;
    
88.     hcan1.pTxMsg->Data[5] = 0x06;
    
89.     hcan1.pTxMsg->Data[6] = 0x07;
    
90.     hcan1.pTxMsg->Data[7] = 0x08;
    
91.      
    
92.     hcan2.pTxMsg->StdId = 0x123;
    
93.   hcan2.pTxMsg->RTR = CAN_RTR_DATA;
    
94.   hcan2.pTxMsg->IDE = CAN_ID_STD;
    
95.   hcan2.pTxMsg->DLC = 8;
    
96.     hcan2.pTxMsg->Data[0] = 0x01;
    
97.     hcan2.pTxMsg->Data[1] = 0x02;
    
98.     hcan2.pTxMsg->Data[2] = 0x03;
    
99.     hcan2.pTxMsg->Data[3] = 0x04;
    
100.     hcan2.pTxMsg->Data[4] = 0x05;
     
101.     hcan2.pTxMsg->Data[5] = 0x06;
     
102.     hcan2.pTxMsg->Data[6] = 0x07;
     
103.     hcan2.pTxMsg->Data[7] = 0x08;
     
104. 
     
105.     if(HAL_CAN_Receive_IT(&hcan1, CAN_FIFO0) != HAL_OK)
     
106.   {
     
107.         DEBUG("HAL_CAN1_Receive_IT ERR\r\n");
     
108.   }
     
109. 
     
110.     if(HAL_CAN_Receive_IT(&hcan2, CAN_FIFO1) != HAL_OK)
     
111.   {
     
112.         DEBUG("HAL_CAN2_Receive_IT ERR\r\n");
     
113.   }
     
114.    
     
115. /*******************************
     
116. main循环
     
117. *******************************/
     
118. 
     
119. CAN2_FLAG = HAL_CAN_Transmit(&hcan2, 10);
     
120. if(CAN2_FLAG == HAL_OK)
     
121. {
     
122.     DEBUG("5AL_CAN_Transmit HAL_OK\r\n");
     
123. }
     
124. else if(CAN2_FLAG == HAL_ERROR)
     
125. {
     
126.     DEBUG("6AL_CAN_Transmit HAL_ERROR\r\n");
     
127. }
     
128. else if(CAN2_FLAG == HAL_BUSY)
     
129. {
     
130.     DEBUG("7AL_CAN_Transmit HAL_BUSY\r\n");
     
131. }
     
132. else if(CAN2_FLAG == HAL_TIMEOUT)
     
133. {
     
134.     DEBUG("8AL_CAN_Transmit HAL_TIMEOUT\r\n");
     
135. }
     
136. CAN2_FLAG = HAL_OK;
     
137.             
     
138. CAN1_FLAG = HAL_CAN_Transmit(&hcan1, 10);
     
139. if(CAN1_FLAG == HAL_OK)
     
140. {
     
141.     DEBUG("1AL_CAN_Transmit HAL_OK\r\n");
     
142. }
     
143. else if(CAN1_FLAG == HAL_ERROR)
     
144. {
     
145.     DEBUG("2AL_CAN_Transmit HAL_ERROR\r\n");
     
146. }
     
147. else if(CAN1_FLAG == HAL_BUSY)
     
148. {
     
149.     DEBUG("3AL_CAN_Transmit HAL_BUSY\r\n");
     
150. }
     
151. else if(CAN1_FLAG == HAL_TIMEOUT)
     
152. {
     
153.     DEBUG("4AL_CAN_Transmit HAL_TIMEOUT\r\n");
     
154. }
     
155. CAN1_FLAG = HAL_OK;
     
156. 
     
157. void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* CanHandle)
     
158. {
     
159.     int i=0;
     
160.      
     
161.     if(CanHandle ==&hcan1)
     
162.     {
     
163.         __HAL_CAN_ENABLE_IT(&hcan1,CAN_IT_FMP0);      
     
164.         printf("1pRxMsg->StdId : 0x%x\r\n",hcan1.pRxMsg->StdId);
     
165.         printf("1pRxMsg->DLC   : 0x%x\r\n",hcan1.pRxMsg->DLC);
     
166.         printf("1DATA :");
     
167.         for(i=0;i<hcan1.pRxMsg->DLC;i++)
     
168.         {
     
169.             printf(" 0x%x ",hcan1.pRxMsg->Data[i]);
     
170.         }
     
171.         printf("\r\n\r\n");
     
172.     }
     
173.      
     
174.     if(CanHandle ==&hcan2)
     
175.     {
     
176.         __HAL_CAN_ENABLE_IT(&hcan2,CAN_IT_FMP1);      
     
177.         printf("2pRxMsg->StdId : 0x%x\r\n",hcan2.pRxMsg->StdId);
     
178.         printf("2pRxMsg->DLC   : 0x%x\r\n",hcan2.pRxMsg->DLC);
     
179.         printf("2DATA :");
     
180.         for(i=0;i<hcan2.pRxMsg->DLC;i++)
     
181.         {
     
182.             printf(" 0x%x ",hcan2.pRxMsg->Data[i]);
     
183.         }
     
184.         printf("\r\n\r\n");
     
185.     }
     
186. }

复制代码

当更改sFilterConfig.FilterNumber = 14;时网上又说仍然要执行HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig)而不能执行HAL_CAN_ConfigFilter(&hcan2, &sFilterConfig),这种方法我也试过,仍旧不行,并且同样尝试过两个CAN使用同一个CAN_FILTER_FIFO0的情况,依然不可行.

示波器上能看到CAN2发送管脚PB13发出的波形大概只有两三位然后就没有了,后边在怎么执行CAN2发送命令也不会再有任何波形.请各位帮忙看一下究竟是哪里出了问题?困扰我三天了死活找不到结症所在

随风

can1和can2没什么区别，主要区别是用can2的时候必须使能Can1的时钟