使用此代码，我正在尝试将文件发送到CC430f5137并从中接收回来。我正在使用2个程序，一个是以下程序（它用于发送和接收文件到我的Linux VM，另一个是用于CC430f5137的程序（它包含rx，我的设备的tx代码，在windows中）。我可以能够将单个字节（例如，A）从文件发送到我的设备，但不能发送多个字节。
//sample1.c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <termios.h>
#define BUFSIZE 1300 //1
int open_serial( char *dev_name, int baud, int vtime, int vmin )
{
int fd;
struct termios newtio;
fd = open( dev_name, O_RDWR | O_NOCTTY );
if ( fd < 0 )
{
printf( "Device OPEN FAIL %s\n", dev_name );
return -1;
}
memset(&newtio, 0, sizeof(newtio));
newtio.c_iflag = IGNPAR|INLCR; // non-parity void UARTHandler(int fd);
newtio.c_oflag = 0;
newtio.c_cflag = CS8 | CLOCAL | CREAD; // NO-rts/cts
switch( baud )
{
case 115200 : newtio.c_cflag |= B115200; break;
case 57600 : newtio.c_cflag |= B57600; break;
case 38400 : newtio.c_cflag |= B38400; break;
case 19200 : newtio.c_cflag |= B19200; break;
case 9600 : newtio.c_cflag |= B9600; break;
case 4800 : newtio.c_cflag |= B4800; break;
case 2400 : newtio.c_cflag |= B2400; break;
default : newtio.c_cflag |= B115200; break;
}
//set input mode (non-canonical, no echo,.....)
newtio.c_lflag = 0;
newtio.c_cc[VTIME] = vtime;
newtio.c_cc[VMIN] = vmin;
tcflush ( fd, TCIFLUSH );
tcsetattr( fd, TCSANOW, &newtio );
return fd;
}
int sendfile(int fd) //void sendfile(int fd)
{
int fd1,readc;
unsigned short fileLength;
unsigned char buf[BUFSIZE];
fd1=open("cert.pem",O_RDONLY);
fileLength=lseek(fd1,0,SEEK_END);
printf("file length is %d bytes\n",fileLength);
lseek(fd1,0,SEEK_SET);
write(fd,(unsigned char*)&fileLength, 2);
while(fileLength>0)
{
if(fileLength>=BUFSIZE)
{
readc=read(fd1,buf,BUFSIZE);
if(readc==-1)
{
printf("read failed!!\n");
}
if(read>0)
{
buf[BUFSIZE]='\0';
printf("%s\n",buf);
if(write(fd,buf,BUFSIZE))
fileLength -= BUFSIZE;
}
}
else
{
readc=read(fd1,buf,fileLength);
if(readc==-1)
{
printf("read failed!!\n");
}
if(readc>0)
{
buf[fileLength]='\0';
printf("%s\n",buf);
if(write(fd, buf, fileLength))
fileLength=0;
}
}
}
printf("%s\n",fd);
printf("file sent succssfully\n");
return fd1;//close(fd1);
close(fd);
}
void receivefile(int fd)
{
char buf[1300],read_byte,buf2[1300];
int fd2,readc;
unsigned short fileLength;
fd2=open("test.pem", O_WRONLY|O_CREAT);
if(fd2<0)
{
printf("file open failed!!\n");
}
while(!(read(fd,(unsigned char*)&fileLength,2)>0));
printf("i am in receive file\n");
while(fileLength>0)
{
readc = read(fd, buf, BUFSIZE);
if(readc==-1)
{
printf("read failed!!\n");
}
printf("read %d bytes, value is %s\n",readc,buf);
if(readc >0)
{
buf[readc]='\0';
printf("buf value is%s\n", buf);
write(fd2,buf,readc);
fileLength -= readc;
}
}
close(fd2);
close(fd);
}
void close_serial( int fd )
{
close( fd );
printf("ClosePort!!\n");
}
int main( int argc, char **argv )
{
int fd;
int baud;
char dev_name[128];
if ( argc != 3)
{
printf( " sample_serial [device] [baud]\n" \
" device : /dev/ttySAC0 ...\n" \
" baud : 2400 ... 115200\n" );
return -1;
}
printf( " Serial test start... (%s)\n", __DATE__ );
strcpy( dev_name, argv[1] );
baud = strtoul( argv[2], NULL, 10 );
fd = open_serial( dev_name, baud, 4, 1);
sendfile(fd);
receivefile(fd);
close_serial( fd );
printf( " Serial test end\n" );
return 0;
}
这是从文件到串口发送1个字节的输出
[root@localhost ~]# gcc -std=c99 -std=gnu99 sample1.c -o out1
sample1.c:151:50: warning: backslash and newline separated by space
sample1.c:152:45: warning: backslash and newline separated by space
[root@localhost ~]# ./out1 /dev/ttyUSB20 115200
Serial test start... (Mar 6 2013)
file length is 2 bytes
A
wrote 3 bytes
file sent succssfully
i am in receive file
read 1 bytes, value is A
buf value isA
read 1 bytes, value is A
buf value isA
read 1 bytes, value is A
buf value isA
read 1 bytes, value is A
buf value isA
这是从文件向串口发送多个字节的输出
[root@localhost ~]# gcc -std=c99 -std=gnu99 sample1.c -o out1
sample1.c:151:50: warning: backslash and newline separated by space
sample1.c:152:45: warning: backslash and newline separated by space
[root@localhost ~]# ./out1 /dev/ttyUSB20 115200
Serial test start... (Mar 6 2013)
file length is 2 bytes
i am doing well today
wrote 3 bytes
file sent succssfully
i am in receive file
read 1 bytes, value is
buf value is
read 1 bytes, value is
buf value is
read 1 bytes, value is
buf value is
read 1 bytes, value is
buf value is
如你所见，我没有收到文件内容，我正在收回空字符 从我的设备，即使我发送多个字节到我的设备。
sendfile（）工作正常，我可以写“cert.pem”到port.I有一个 从端口读取文件并写回“test.pem”的问题。我得到了输出 接收器程序中给出的一些打印语句，但是连续获取数据。标记在一个 合适的方式。我也重置了所有连接。
答案 0 :(得分：2)
你做错了 - 不是重新发明通过串行链接发送二进制文件问题的解决方案，而是使用现有的标准解决方案，例如ZMODEM
当你这样做时，你不必编写Linux端程序，因为已经存在一个免费程序，你可以将现有程序移植到你的CC430f5137，无论是什么。
答案 1 :(得分：1)
让我们从明显的开始。
a：Sendfile中没有任何循环结构......
b：缓冲区溢出，如下所示：
unsigned char buf[BUFSIZE];
...
buf[BUFSIZE]=0
c：你有这样的调试'读取1个字节，值是A'但它不在代码中。很难修复你没有发布的代码...