#include "main.h" #include "usbd_cdc_interface.h" #include "string.h" #include "stdarg.h" #include "stdio.h" #include "usart.h" #include "delay.h" ////////////////////////////////////////////////////////////////////////////////// /**************************************************************************/ //usb vcp驱动代码 //STM32H7工程模板-HAL库函数版本 //DevEBox 大越创新 //淘宝店铺：mcudev.taobao.com //淘宝店铺：shop389957290.taobao.com /**************************************************************************/ ////////////////////////////////////////////////////////////////////////////////// //USB虚拟串口相关配置参数 USBD_CDC_LineCodingTypeDef LineCoding= { 115200, //波特率 0x00, //停止位,默认1位 0x00, //校验位,默认无 0x08 //数据位,默认8位 }; u8 USART_PRINTF_Buffer[USB_USART_REC_LEN]; //usb_printf发送缓冲区 //用类似串口1接收数据的方法,来处理USB虚拟串口接收到的数据. u8 USB_USART_RX_BUF[USB_USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节. u8 USBRxBuffer[USB_USART_REC_LEN]; //USB接收的数据缓冲区,最大USART_REC_LEN个字节. //接收状态 //bit15， 接收完成标志 //bit14， 接收到0x0d //bit13~0， 接收到的有效字节数目 u16 USB_USART_RX_STA=0; //接收状态标记 extern USBD_HandleTypeDef USBD_Device; static int8_t CDC_Itf_Init(void); static int8_t CDC_Itf_DeInit(void); static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t * pbuf, uint16_t length); static int8_t CDC_Itf_Receive(uint8_t * pbuf, uint32_t * Len); //虚拟串口配置函数(供USB内核调用) USBD_CDC_ItfTypeDef USBD_CDC_fops= { CDC_Itf_Init, CDC_Itf_DeInit, CDC_Itf_Control, CDC_Itf_Receive }; //初始化VCP //返回值:USBD_OK static int8_t CDC_Itf_Init(void) { USBD_CDC_SetRxBuffer(&USBD_Device,USBRxBuffer); return (USBD_OK); } //复位VCP //返回值:USBD_OK static int8_t CDC_Itf_DeInit(void) { return (USBD_OK); } //控制VCP的设置 //buf:命令数据缓冲区/参数保存缓冲区 //len:数据长度 //返回值:USBD_OK static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t * pbuf, uint16_t length) { switch (cmd) { case CDC_SEND_ENCAPSULATED_COMMAND:break; case CDC_GET_ENCAPSULATED_RESPONSE:break; case CDC_SET_COMM_FEATURE:break; case CDC_GET_COMM_FEATURE:break; case CDC_CLEAR_COMM_FEATURE:break; case CDC_SET_LINE_CODING: LineCoding.bitrate = (uint32_t) (pbuf[0] | (pbuf[1] << 8) | (pbuf[2] << 16) | (pbuf[3] << 24)); LineCoding.format = pbuf[4]; LineCoding.paritytype = pbuf[5]; LineCoding.datatype = pbuf[6]; //打印配置参数 printf("linecoding.format:%d\r\n",LineCoding.format); printf("linecoding.paritytype:%d\r\n",LineCoding.paritytype); printf("linecoding.datatype:%d\r\n",LineCoding.datatype); printf("linecoding.bitrate:%d\r\n",LineCoding.bitrate); break; case CDC_GET_LINE_CODING: pbuf[0] = (uint8_t) (LineCoding.bitrate); pbuf[1] = (uint8_t) (LineCoding.bitrate >> 8); pbuf[2] = (uint8_t) (LineCoding.bitrate >> 16); pbuf[3] = (uint8_t) (LineCoding.bitrate >> 24); pbuf[4] = LineCoding.format; pbuf[5] = LineCoding.paritytype; pbuf[6] = LineCoding.datatype; break; case CDC_SET_CONTROL_LINE_STATE:break; case CDC_SEND_BREAK:break; default:break; } return (USBD_OK); } //处理从USB虚拟串口接收到的数据 //databuffer:数据缓存区 //Nb_bytes:接收到的字节数. //返回值:USBD_OK uint16_t VCP_DataRx (uint8_t* Buf, uint32_t Len) { u8 i; u8 res; for(i=0;i(USB_USART_REC_LEN-1))USB_USART_RX_STA=0;//接收数据错误,重新开始接收 } } } } return USBD_OK; } //通过USB发送数据 //data:要发送的数据 //length:数据长度 void VCP_DataTx(uint8_t *data,uint32_t Len) { USBD_CDC_SetTxBuffer(&USBD_Device,data,Len); USBD_CDC_TransmitPacket(&USBD_Device); delay_ms(CDC_POLLING_INTERVAL); } //usb虚拟串口,printf 函数 //确保一次发送数据不超USB_USART_REC_LEN字节 void usb_printf(char* fmt,...) { u16 i; va_list ap; va_start(ap,fmt); vsprintf((char*)USART_PRINTF_Buffer,fmt,ap); va_end(ap); i=strlen((const char*)USART_PRINTF_Buffer); //此次发送数据的长度 VCP_DataTx(USART_PRINTF_Buffer,i); //发送数据 SCB_CleanDCache_by_Addr((uint32_t *)USART_PRINTF_Buffer,i); } //CDC数据接收函数 //Buf:接收数据缓冲区 //Len:接收到的数据长度 static int8_t CDC_Itf_Receive(uint8_t *Buf,uint32_t *Len) { SCB_CleanDCache_by_Addr((uint32_t *)Buf,*Len); USBD_CDC_ReceivePacket(&USBD_Device); VCP_DataRx(Buf,*Len); return (USBD_OK); }