[問題]ARM板上使用rs232之問題
各位大大好~
小妹最近再碰ARM的硬體
我有兩個ARM板,想透過RS-232來互相傳輸
...我的TX端的程式是這樣的 :
int main()
{
int fd;
char buffer[]="0123456789";
int Length=255;
int nByte;
fd=open("/dev/ttyS1",O_RDWR | O_NONBLOCK);
while(fd!=0)
{
nByte = write(fd,buffer,Length);
printf(" buffer is= %s nByte=%d",buffer,nByte);
}
close(fd);
}
RX端:
int main()
{
int fd;
int nByte;
char buf[255];
fd=open("/dev/ttyS1",O_RDWR );
if (fd==NULL) printf("open error\n");
while (nByte !=NULL)
{
nByte = read(fd,buf,255);
printf("nByte=%d\n",nByte);
printf("buffer is: %s nByte=%d", buf , nByte);
}
close(fd);
}
可是不知道為什麼接收端的ARM板,好像收不到TX端要傳的字串,都顯示不出來
(rx端 極少數幾筆有正確顯示字串)
不知道有沒有大大們用過ARM板的rs232傳輸過,我是用C語言寫code,
我已經確認rs232是可以互相傳輸,rx為甚麼使用迴圈會發生錯誤,
是接收端buffer問題嗎~? 希望有經驗的大大解答^^
如果我有什麼地方說明不好,我會再補充~謝謝各位~"~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 118.169.41.42
推
10/29 07:01, , 1F
10/29 07:01, 1F
→
10/29 07:03, , 2F
10/29 07:03, 2F
→
10/29 07:05, , 3F
10/29 07:05, 3F
→
10/29 07:07, , 4F
10/29 07:07, 4F
→
10/29 07:08, , 5F
10/29 07:08, 5F
→
10/29 07:10, , 6F
10/29 07:10, 6F
→
10/29 13:04, , 7F
10/29 13:04, 7F
推
10/29 22:29, , 8F
10/29 22:29, 8F
推
10/29 22:34, , 9F
10/29 22:34, 9F
→
10/30 11:16, , 10F
10/30 11:16, 10F
→
10/30 11:18, , 11F
10/30 11:18, 11F
→
10/30 11:19, , 12F
10/30 11:19, 12F
→
10/30 11:20, , 13F
10/30 11:20, 13F
→
10/30 17:27, , 14F
10/30 17:27, 14F
推
10/30 19:20, , 15F
10/30 19:20, 15F
推
10/30 22:40, , 16F
10/30 22:40, 16F
→
10/30 22:41, , 17F
10/30 22:41, 17F
→
10/30 22:43, , 18F
10/30 22:43, 18F
→
10/30 22:44, , 19F
10/30 22:44, 19F
→
10/30 22:46, , 20F
10/30 22:46, 20F
→
10/30 22:46, , 21F
10/30 22:46, 21F
→
10/30 22:48, , 22F
10/30 22:48, 22F
→
10/30 22:49, , 23F
10/30 22:49, 23F
推
10/31 08:45, , 24F
10/31 08:45, 24F
→
10/31 08:46, , 25F
10/31 08:46, 25F
→
10/31 08:47, , 26F
10/31 08:47, 26F
推
10/31 08:53, , 27F
10/31 08:53, 27F
→
10/31 11:19, , 28F
10/31 11:19, 28F
※ 編輯: a910937 來自: 140.126.131.70 (10/31 11:23)
→
10/31 22:35, , 29F
10/31 22:35, 29F
→
11/01 14:29, , 30F
11/01 14:29, 30F
→
11/15 16:35, , 31F
11/15 16:35, 31F
推
09/18 16:45, , 32F
09/18 16:45, 32F
LinuxDev 近期熱門文章
PTT數位生活區 即時熱門文章
