227 lines
5.3 KiB
C
227 lines
5.3 KiB
C
#include "usbd_cdc_vcp.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 "mymem.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK STM32开发板
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//usb vcp驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//创建日期:2016/2/24
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//版本：V1.0
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2009-2019
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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//USB虚拟串口相关配置参数
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LINE_CODING 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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/* 传送数据时的格式 0xff,0xff开头,len_h,len_l长度,*/
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static 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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static int USB_USART_RX_LEN =0;
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static int USB_USART_RX_DONE=0;
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extern uint8_t APP_Rx_Buffer []; //虚拟串口发送缓冲区(发给电脑)
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extern uint32_t APP_Rx_ptr_in; //虚拟串口接收缓冲区(接收来自电脑的数据)
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//虚拟串口配置函数(供USB内核调用)
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CDC_IF_Prop_TypeDef VCP_fops =
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{
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VCP_Init,
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VCP_DeInit,
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VCP_Ctrl,
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VCP_DataTx,
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VCP_DataRx
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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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uint16_t VCP_Init(void)
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{
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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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uint16_t VCP_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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uint16_t VCP_Ctrl (uint32_t Cmd, uint8_t* Buf, uint32_t Len)
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{
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switch (Cmd)
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{
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case SEND_ENCAPSULATED_COMMAND:
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break;
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case GET_ENCAPSULATED_RESPONSE:
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break;
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case SET_COMM_FEATURE:
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break;
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case GET_COMM_FEATURE:
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break;
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case CLEAR_COMM_FEATURE:
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break;
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case SET_LINE_CODING:
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linecoding.bitrate = (uint32_t)(Buf[0] | (Buf[1] << 8) | (Buf[2] << 16) | (Buf[3] << 24));
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linecoding.format = Buf[4];
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linecoding.paritytype = Buf[5];
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linecoding.datatype = Buf[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 GET_LINE_CODING:
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Buf[0] = (uint8_t)(linecoding.bitrate);
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Buf[1] = (uint8_t)(linecoding.bitrate >> 8);
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Buf[2] = (uint8_t)(linecoding.bitrate >> 16);
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Buf[3] = (uint8_t)(linecoding.bitrate >> 24);
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Buf[4] = linecoding.format;
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Buf[5] = linecoding.paritytype;
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Buf[6] = linecoding.datatype;
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break;
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case SET_CONTROL_LINE_STATE:
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break;
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case SEND_BREAK:
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break;
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default:
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break;
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}
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return USBD_OK;
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}
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//发送一个字节给虚拟串口(发给电脑)
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//data:要发送的数据
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//返回值:USBD_OK
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uint16_t VCP_DataTx (uint8_t data)
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{
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APP_Rx_Buffer[APP_Rx_ptr_in]=data; //写入发送buf
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APP_Rx_ptr_in++; //写位置加1
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if(APP_Rx_ptr_in==APP_RX_DATA_SIZE) //超过buf大小了,归零.
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{
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APP_Rx_ptr_in = 0;
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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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int 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 ((res==0xff)&&(USB_USART_RX_LEN==0))
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// {USB_USART_RX_BUF[USB_USART_RX_LEN]=res;USB_USART_RX_LEN++;}
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// else if ((res==0xff)&&(USB_USART_RX_LEN==1))
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// {USB_USART_RX_BUF[USB_USART_RX_LEN]=res;USB_USART_RX_LEN++;}
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// else if ((USB_USART_RX_LEN<USB_USART_REC_LEN)&&(USB_USART_RX_LEN>1))
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// { if (USB_USART_RX_DONE==0) {USB_USART_RX_BUF[USB_USART_RX_LEN]=res; USB_USART_RX_LEN++; }}
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// if (USB_USART_RX_LEN==USB_USART_REC_LEN)
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// { USB_USART_RX_DONE=1; }
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// if ((((USB_USART_RX_BUF[2]<<8)|(USB_USART_RX_BUF[3]))==(USB_USART_RX_LEN-2))&&(USB_USART_RX_LEN>2))
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// { USB_USART_RX_DONE=1; }
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// USB_USART_RX_BUF[i]=Buf[i];
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// Buf[i]=0;
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// }
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//把半个字节的数据整理成一个字节
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Len/=2;
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for (int i=0;i<Len;i++)
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{
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Buf[i]=(Buf[i*2]<<4)|(Buf[i*2+1]&0x0f);
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}
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extern void SysFile_UpdataByIrq (u8 *data,int len);
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SysFile_UpdataByIrq (Buf,Len);
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return USBD_OK;
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}
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//取得usb接收到的数据
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int usb_getRecvData (u8 *buff,int buffLen)
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{
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int ret=0;
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if (USB_USART_RX_DONE)
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{
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ret=buffLen;if (ret>USB_USART_RX_LEN) ret=USB_USART_RX_LEN;
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mymemcpy (buff,USB_USART_RX_BUF,ret);
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mymemset (USB_USART_RX_BUF,0,USB_USART_REC_LEN);
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USB_USART_RX_DONE=0;
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USB_USART_RX_LEN=0;
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}
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return ret;
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}
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//通过usb发送数据
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int usb_sendData (u8 *buff,int buffLen)
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{
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int ret=0;
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ret=buffLen;if (ret>USB_USART_REC_LEN) ret=USB_USART_REC_LEN;
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for (int i=0;i<ret;i++) VCP_DataTx (buff[i]);
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return ret;
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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,j;
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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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for(j=0;j<i;j++)//循环发送数据
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{
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VCP_DataTx(USART_PRINTF_Buffer[j]);
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}
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}
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