微信蓝牙协议栈移植

2023-11-04 13:23:16

微信蓝牙一般是基于串口的，所以只跟串口底层相关，也就是只需要将串口发送和接收两个函数填充到协议栈对外接口函数就行了。

先把微信SDK包加载在我们自己的项目中，整个移植过程我们只需要改动proto.c文件里边5个接口函数。

1、先把串口准备好

#include "uart.h"
#include "uart_config.h"

enum BLE_TRAN_FSM
{
    bMagicNumber = 0,
    bVer,
    nLenghth_hi,
    nLenghth_low,
    bdata,
};  


unsigned char recv_from_ble_buf[60]= {0};
unsigned char m_frame_buffer[256]={0};    //定义BLE帧结构，长度20个字节

unsigned char rxbuf[256]={0};
unsigned char rx_idx=0;
unsigned short uart0_rx_len;
unsigned short uart0_rx_cnt=0;
unsigned short uart0_buf_num=0;
static unsigned char uart0_tran_state = 0;
unsigned char uart0_tran_complt = 0;

void UART0_Init(void)
{   
}

void uart0_putchar(unsigned char dat)
{
}

unsigned char UART0_Put_N_Byte (unsigned char* data_buf,unsigned char data_len)
{
    unsigned char i;     
    //BT_EN_OFF;    
    for (i = 0; i < data_len; i++)
    {
        uart0_putchar(data_buf[i]);
    }    
    //BT_EN_ON;
    return data_len;
}

//拷贝串口缓冲区数据
unsigned char  UART0_Get_Buf(unsigned char* data_buf)
{
    unsigned char i;
    if(uart0_tran_complt)       
    {        
        uart0_buf_num = uart0_rx_len;
        for(i=0;i<uart0_rx_len;i++)
        {
            *data_buf ++ = rxbuf[i];
        }
        uart0_tran_complt = 0; 
        uart0_rx_len = 0;               
    }
    else 
    { 
        uart0_buf_num = 0;
    }
    return uart0_buf_num;
} 

void UART0_ISR(void)
{        
    rxbuf[rx_idx]=UART0_D;
    rx_idx+=1;   
    switch(uart0_tran_state) 
    {
        case bMagicNumber:
            if(MAGIC_NUMBER_ID == rxbuf[0]) 
            {             
                uart0_tran_state = bVer; 
            }
            else
            {
                uart0_tran_state = bMagicNumber; rx_idx=0;
            }
            break;
        case bVer:
            if(DEVEICE_VERSION_ID == rxbuf[1])
            {
                uart0_tran_state = nLenghth_hi;
                //uart0_putstring("uart0_tran_state : bVer \r\n");
                //预留用一个定时器来做超时检测
                //uart0_timeout = 20;                      
            }
            else
            {
                uart0_tran_state = bMagicNumber; rx_idx=0;
            }
            break;
        
        case nLenghth_hi:                   
            uart0_tran_state = nLenghth_low;
        
        break;  
        
        case nLenghth_low:       
            uart0_rx_len = (unsigned short) ((rxbuf[2]<<8)|rxbuf[3]); 
            uart0_tran_state = bdata;
        break; 
        
        case bdata:      
            if(rx_idx == uart0_rx_len) 
            {              
                uart0_tran_complt = 1;
                uart0_tran_state = bMagicNumber;
                rx_idx=0;
           
            }
            
            //串口超时之后再添加  
            //if(uart0_timeout) 
            //{
            //    for(iRev=0;iRev<20;iRev++) {rxbuf[]=0;rx_idx=0;}          
            //}
        
        
        break;
        
        default:
            uart0_tran_state = bMagicNumber; rx_idx=0;
        
        break;
    }           
}