Linux串口断帧处理

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
 
#define START_BYTE 0x02
#define END_BYTE 0x03
 
static int times = 0;
int my_read(uint8_t *data, uint32_t max_len)
{
   char *a="\x02\x30\x30\x37\x37\x7B\x22\x64\x61\x74\x61\x22\x3A\x7B\x22\x61";
   char *b="\x63\x74\x69\x6F\x6E\x22\x3A\x31\x7D\x2C\x22\x63\x6D\x64\x22\x3A\x22\x43\x32\x22\x2C\x22\x74\x69\x6D\x65\x22\x3A\x22\x31\x36\x39\x37\x31\x31\x30\x36\x39\x39\x30\x38\x33\x22\x2C\x22\x6D\x73\x67\x5F\x69\x64\x22\x3A\x22\x31\x36\x39\x37\x31\x31\x30\x36\x39\x39\x22";
   char *c="\x7D\x44\x42\x46\x32\x03";
   
   size_t bytesRead = 0;
 
	if(times==0)
	{
		bytesRead = 16;
		memcpy(data, a, 16);
		times++;
	}
	else if(times==1)
	{
		bytesRead = 65;
		memcpy(data, b, bytesRead);
		times++;
	}
	else
	{
		times = 0;
		bytesRead = 6;
		memcpy(data, c, bytesRead);
	}
	
	return bytesRead;
	
}
 
int my_recv(uint8_t *recv_data, uint32_t *recv_len)
{
    // 从串口接收数据
    uint8_t buffer[1024] = {0};
	*recv_len = 0;
    size_t bytesRead = 0;
		
	while (true) {
 
		bytesRead = my_read(buffer, sizeof(buffer));
		// 处理接收到的数据
		if (bytesRead <= 0) 
		{
			break;
		}
		
		printf("bytesRead=%ld\n",bytesRead);
		if(buffer[0] == START_BYTE)
		{
			*recv_len = bytesRead;
			memcpy(recv_data, buffer, bytesRead);
		}
		else
		{
			if((*recv_len+bytesRead)> sizeof(buffer))
			{
				*recv_len = 0;
				break;
			}
			memcpy(recv_data+*recv_len, buffer, bytesRead);
			*recv_len += bytesRead;
		}
 
		if(recv_data[0] != START_BYTE) 
		{
				*recv_len = 0;
				break;
		}
		
		if(recv_data[*recv_len-1] == END_BYTE)
		{
			return *recv_len;
		}
	} 
	
	return -1;
}
 
int main() {
   uint8_t frame[1024];
   int frame_len;
   memset(frame, 0, sizeof(frame));
 
   printf("len=%d\n", my_recv(frame, &frame_len));
   
   if(frame_len > 6)
   {
		// 打印报文数据
		printf("Received frame: ");
		for (size_t i = 0; i < frame_len-10; i++) {
			printf("%02x ", frame[i+5]);
		}
		printf("\n");
   }
   
   return 0;
}