184 lines
5.0 KiB
C
184 lines
5.0 KiB
C
#include "main.h"
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#include "usbd_cdc_interface.h"
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#include "string.h"
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#include "stdarg.h"
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#include "stdio.h"
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#include "usart.h"
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#include "delay.h"
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//////////////////////////////////////////////////////////////////////////////////
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/**************************************************************************/
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//usb vcp驱动代码
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//STM32H7工程模板-HAL库函数版本
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//DevEBox 大越创新
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//淘宝店铺：mcudev.taobao.com
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//淘宝店铺：shop389957290.taobao.com
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/**************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////
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//USB虚拟串口相关配置参数
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USBD_CDC_LineCodingTypeDef LineCoding=
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{
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115200, //波特率
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0x00, //停止位,默认1位
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0x00, //校验位,默认无
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0x08 //数据位,默认8位
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};
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u8 USART_PRINTF_Buffer[USB_USART_REC_LEN]; //usb_printf发送缓冲区
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//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.
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u8 USB_USART_RX_BUF[USB_USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.
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u8 USBRxBuffer[USB_USART_REC_LEN]; //USB接收的数据缓冲区,最大USART_REC_LEN个字节.
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//接收状态
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//bit15， 接收完成标志
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//bit14， 接收到0x0d
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//bit13~0， 接收到的有效字节数目
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u16 USB_USART_RX_STA=0; //接收状态标记
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extern USBD_HandleTypeDef USBD_Device;
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static int8_t CDC_Itf_Init(void);
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static int8_t CDC_Itf_DeInit(void);
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static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t * pbuf, uint16_t length);
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static int8_t CDC_Itf_Receive(uint8_t * pbuf, uint32_t * Len);
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//虚拟串口配置函数(供USB内核调用)
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USBD_CDC_ItfTypeDef USBD_CDC_fops=
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{
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CDC_Itf_Init,
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CDC_Itf_DeInit,
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CDC_Itf_Control,
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CDC_Itf_Receive
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};
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//初始化VCP
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//返回值:USBD_OK
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static int8_t CDC_Itf_Init(void)
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{
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USBD_CDC_SetRxBuffer(&USBD_Device,USBRxBuffer);
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return (USBD_OK);
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}
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//复位VCP
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//返回值:USBD_OK
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static int8_t CDC_Itf_DeInit(void)
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{
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return (USBD_OK);
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}
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//控制VCP的设置
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//buf:命令数据缓冲区/参数保存缓冲区
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//len:数据长度
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//返回值:USBD_OK
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static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t * pbuf, uint16_t length)
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{
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switch (cmd)
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{
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case CDC_SEND_ENCAPSULATED_COMMAND:break;
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case CDC_GET_ENCAPSULATED_RESPONSE:break;
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case CDC_SET_COMM_FEATURE:break;
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case CDC_GET_COMM_FEATURE:break;
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case CDC_CLEAR_COMM_FEATURE:break;
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case CDC_SET_LINE_CODING:
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LineCoding.bitrate = (uint32_t) (pbuf[0] | (pbuf[1] << 8) |
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(pbuf[2] << 16) | (pbuf[3] << 24));
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LineCoding.format = pbuf[4];
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LineCoding.paritytype = pbuf[5];
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LineCoding.datatype = pbuf[6];
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//打印配置参数
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printf("linecoding.format:%d\r\n",LineCoding.format);
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printf("linecoding.paritytype:%d\r\n",LineCoding.paritytype);
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printf("linecoding.datatype:%d\r\n",LineCoding.datatype);
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printf("linecoding.bitrate:%d\r\n",LineCoding.bitrate);
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break;
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case CDC_GET_LINE_CODING:
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pbuf[0] = (uint8_t) (LineCoding.bitrate);
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pbuf[1] = (uint8_t) (LineCoding.bitrate >> 8);
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pbuf[2] = (uint8_t) (LineCoding.bitrate >> 16);
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pbuf[3] = (uint8_t) (LineCoding.bitrate >> 24);
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pbuf[4] = LineCoding.format;
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pbuf[5] = LineCoding.paritytype;
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pbuf[6] = LineCoding.datatype;
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break;
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case CDC_SET_CONTROL_LINE_STATE:break;
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case CDC_SEND_BREAK:break;
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default:break;
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}
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return (USBD_OK);
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}
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//处理从USB虚拟串口接收到的数据
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//databuffer:数据缓存区
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//Nb_bytes:接收到的字节数.
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//返回值:USBD_OK
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uint16_t VCP_DataRx (uint8_t* Buf, uint32_t Len)
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{
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u8 i;
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u8 res;
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for(i=0;i<Len;i++)
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{
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res=Buf[i];
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if((USB_USART_RX_STA&0x8000)==0) //接收未完成
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{
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if(USB_USART_RX_STA&0x4000) //接收到了0x0d
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{
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if(res!=0x0a)USB_USART_RX_STA=0;//接收错误,重新开始
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else USB_USART_RX_STA|=0x8000; //接收完成了
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}else //还没收到0X0D
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{
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if(res==0x0d)USB_USART_RX_STA|=0x4000;
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else
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{
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USB_USART_RX_BUF[USB_USART_RX_STA&0X3FFF]=res;
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USB_USART_RX_STA++;
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if(USB_USART_RX_STA>(USB_USART_REC_LEN-1))USB_USART_RX_STA=0;//接收数据错误,重新开始接收
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}
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}
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}
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}
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return USBD_OK;
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}
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//通过USB发送数据
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//data:要发送的数据
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//length:数据长度
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void VCP_DataTx(uint8_t *data,uint32_t Len)
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{
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USBD_CDC_SetTxBuffer(&USBD_Device,data,Len);
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USBD_CDC_TransmitPacket(&USBD_Device);
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delay_ms(CDC_POLLING_INTERVAL);
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}
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//usb虚拟串口,printf 函数
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//确保一次发送数据不超USB_USART_REC_LEN字节
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void usb_printf(char* fmt,...)
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{
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u16 i;
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va_list ap;
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va_start(ap,fmt);
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vsprintf((char*)USART_PRINTF_Buffer,fmt,ap);
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va_end(ap);
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i=strlen((const char*)USART_PRINTF_Buffer); //此次发送数据的长度
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VCP_DataTx(USART_PRINTF_Buffer,i); //发送数据
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SCB_CleanDCache_by_Addr((uint32_t *)USART_PRINTF_Buffer,i);
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}
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//CDC数据接收函数
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//Buf:接收数据缓冲区
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//Len:接收到的数据长度
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static int8_t CDC_Itf_Receive(uint8_t *Buf,uint32_t *Len)
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{
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SCB_CleanDCache_by_Addr((uint32_t *)Buf,*Len);
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USBD_CDC_ReceivePacket(&USBD_Device);
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VCP_DataRx(Buf,*Len);
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return (USBD_OK);
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}
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