stm32f407 CAN 配制问题 把pd0 pd1 配制成CAN 怎么都没有数据输出。 GPIO_InitTypeDef GPIO_InitStructure; CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure;#if CAN1_RX0_INT_ENABLE NVIC_InitTypeDef NVIC_InitStructure;#endif //使能相关时钟 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD ENABLE);//使能PORTA时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1 ENABLE);//使能CAN1时钟 //初始化GPIO GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0| GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOD &GPIO_InitStructure);//初始化PA11PA12 //引脚复用映射配置 GPIO_PinAFConfig(GPIODGPIO_PinSource0GPIO_AF_CAN1); //GPIOA11复用为CAN1 GPIO_PinAFConfig(GPIODGPIO_PinSource1GPIO_AF_CAN1); //GPIOA12复用为CAN1
stm32f407 用CUBEMX USART 发送数据没有发送出去。 . /@@* Infinite loop */ /@@* USER CODE BEGIN WHILE */ while (1) { /@@* USER CODE END WHILE */ HAL_UART_Transmit(&huart1"hello world" 121000); /@@* USER CODE BEGIN 3 */ }/@@* USART1 init function */void MX_USART1_UART_Init(void){ huart1.Instance = USART1; huart1.Init.BaudRate = 115200; huart1.Init.WordLength = UART_WORDLENGTH_8B; huart1.Init.StopBits = UART_STOPBITS_1; huart1.Init.Parity = UART_PARITY_NONE; huart1.Init.Mode = UART_MODE_TX_RX; huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart1.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart1) != HAL_OK) { Error_Handler(); }}void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle){ GPIO_InitTypeDef GPIO_InitStruct = {0}; if(uartHandle->Instance==USART1) { /@@* USER CODE BEGIN USART1_MspInit 0 */ /@@* USER CODE END USART1_MspInit 0 */ /@@* USART1 clock enable */ __HAL_RCC_USART1_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /@@**USART1 GPIO Configuration PA9 ------> USART1_TX PA10 ------> USART1_RX */ GPIO_InitStruct.Pin = GPIO_PIN_9; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; GPIO_InitStruct.Alternate = GPIO_AF7_USART1; HAL_GPIO_Init(GPIOA &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_10; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStruct.Alternate = GPIO_AF7_USART1; HAL_GPIO_Init(GPIOA &GPIO_InitStruct); /@@* USART1 interrupt Init */ HAL_NVIC_SetPriority(USART1_IRQn 1 0); HAL_NVIC_EnableIRQ(USART1_IRQn); /@@* USER CODE BEGIN USART1_MspInit 1 */ /@@* USER CODE END USART1_MspInit 1 */ }}
最近在用FreeRTOS搞多任务uart发送我发现有个问题 比如task A{ for（i=0;i<3;i++）os_uart_send(i);}os_uart_send是把参数作为消息邮箱要发送的值发送给 task B然后task B就是调用uart把消息邮箱的值进行发送结果只发送了2 即只task B只执行了一次为什么不是发送0 1 2按道理来说应该是task A发送了3次消息邮箱激活task B 3次 那么每次激活应该立马打断task A 执行task B的内容内核是配置了抢占的 B的优先级也比A的高 结果还是要task A执行完 才执行一次task B
stm32f767 USB hid cubema 怎么配制 配制一直无法识别USB HID。
先上代码：UINT8 znFAT_Enter_Dir2(INT8 *dirpathUINT32 *pClusterUINT32 *pos) { UINT8 index=0res=0; UINT32 i=1;// #ifndef USE_LFN INT8 dirname[13];// #else// INT8 dirname[MAX_LFN_LEN+1];// #endif *pos=1; *pCluster=2;printf("000\r\n"); if(('\\'==dirpath[0] || '/'==dirpath[0]) && '\0'==dirpath[1]) //Èç¹ûÊÇ"\\"£¬ÔòÖ±½ÓÈ¡Ê×Ŀ¼´Ø£¬¼´µÚ2´Ø { printf("222\r\n"); return ERR_SUCC; } ////////////////////////////// printf("111\r\n"); while('\0'!=dirpath[i]) { if('\\'==dirpath[i] || '/'==dirpath[i]) { dirname[index]='\0'; index=0; res=Get_Dir_Start_Cluster(dirnamepCluster); if(res) { printf("333\r\n");return res; //·µ»Ø´íÎóÂë } *pos=i+1; } else { dirname[index]=dirpath[i]; index++; #ifndef USE_LFN if(index>12) //Èç¹û²»Ê¹Óó¤Ãû£¬ÔòĿ¼ÃûÒÔ¼°ÎļþÃû×²»Äܳ¬¹ý8+1+3 {printf("444\r\n");return ERR_SFN_ILL_LEN; //Ŀ¼Ãû³¤ÓÚ8.3£¬Òà·ÀÖ¹dirnameÒç³ö } #else if(index>MAX_LFN_LEN) //Èç¹ûʹÓó¤Ãû£¬ÔòĿ¼ÃûÒÔ¼°ÎļþÃû×²»Äܳ¬¹ýÉ趨µÄ³¤Ãû×³¤¶È { printf("555\r\n");return ERR_LFN_BUF_OUT; //Ŀ¼Ãû³¤ÓÚMAX_LFN_LEN£¬Òà·ÀÖ¹dirnameÒç³ö } #endif } i++; } printf("666\r\n"); return ERR_SUCC; //³É¹¦}int main(void){ UINT32 res=0len=0;UINT32 ijnxy;UINT8 temp;UINT32 ncluster=0; //Ö¸¶¨Ä¿Â¼ÎªÊ×Ŀ¼UINT32 *p;delay_init();uart_init(115200); //´®¿Ú³õʼ»¯Îª115200printf("´®¿ÚÉèÖÃÍê±Ï\r\n");znFAT_Device_Init(); //´æ´¢É豸³õʼ»¯ printf("SD¿¨³õʼ»¯Íê±Ï\r\n");TFT_init2();TFT_clear(0x001f);TFT_GPIO_DeInit();znFAT_Select_Device(0&Init_Args); //Ñ¡ÔñÉ豸TFT_init1();TFT_clear(0x0000);res=znFAT_Init(); //Îļþϵͳ³õʼ»¯ if(!res) //Îļþϵͳ³õʼ»¯³É¹¦ {printf("Suc. to init FS\r\n");printf("BPB_Sector_No: %d"Init_Args.BPB_Sector_No); printf("Total_SizeKB: %d"Init_Args.Total_SizeKB); printf("BytesPerSector: %d"Init_Args.BytesPerSector); printf("FATsectors: %d"Init_Args.FATsectors); printf("SectorsPerClust: %d"Init_Args.SectorsPerClust); printf("FirstFATSector: %d"Init_Args.FirstFATSector); printf("FirstDirSector: %d"Init_Args.FirstDirSector); printf("FSsec: %d"Init_Args.FSINFO_Sec);printf("Next_Free_Cluster: %d"Init_Args.Next_Free_Cluster);printf("FreenCluster: %d\n"Init_Args.Free_nCluster); } else //Îļþϵͳ³õʼ»¯Ê§°Ü {printf("Fail to init FS Err Code: %d"res); } printf("AAA\r\n"); //if(!znFAT_Enter_Dir("\\ABC\\A\\B\\C\\D\\E\\F\\G\\H\\I\\J\\"&nclusterp)) if(!znFAT_Enter_Dir2("\\ABC\\"&nclusterp)) { printf("start cluster is %d\n"ncluster); } else { printf("fail.\n"); } printf("BBB\r\n");return 0; //while(1); } 定义了一个函数：UINT8 znFAT_Enter_Dir2(INT8 *dirpathUINT32 *pClusterUINT32 *pos) 功能是进入一个目录，获取目录的开始簇。程序下载进去，用串口助手查看，如下：只打印到AAA就停止了。我在znFAT_Enter_Dir2这个函数内部也设置了好多打印语句，可是一句也没打印出来。貌似进入该函数以后，出不来了，而且好像什么也没执行。我感到很奇怪，百思不得其解。还有一个问题，UINT8UINT32明明定义了，可是双击找定义的地方，提示：求高手解惑，谢谢！
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