Hello.
I'm beginner in ppc linux, so I believe, you can help me. I hope you'll be able
to understand my english :o).
I have MPC5200Lite board with Linux from Denx (kernel 2.4.25).
I try to use PSC in UART mode to read chars from other system.
My init ttyS function:
i_Fd = open("/dev/ttyS2", O_RDWR | O_NOCTTY |O_NDELAY);
if (i_Fd == -1 )
{DEBUG_OUT("[ERROR]\r\n");}
else
{
tcgetattr(i_Fd,&strBufOptions);
bzero(&strOptions, sizeof(strOptions));
strOptions.c_cflag = Baud | CS8 |CREAD |CLOCAL;
strOptions.c_iflag = 0;
strOptions.c_oflag = 0;
strOptions.c_lflag = 0;
strOptions.c_cc[VTIME] = 0;
strOptions.c_cc[VMIN] = 0;
tcflush(i_Fd, TCIFLUSH);
tcsetattr(i_Fd,TCSANOW,&strOptions);
}
Everything works fine until first framing error (FE) in receiver. Since then
function read(i_Fd,DataBuffer,CO_MAX_BUF_LEN-1) returns number of received
chars, but value of every char in DataBuffer is zero.
I have done some experiments and noticed one more strange things:
1. I use hyperterminal in 115200 baud as root console
2. If I change speed to 9600, send one char to MPC5200 (framing error?) and
change speed back to 115200 -> uart blocks (there is no response in the
console).
..so maybe bug isn't in my code...?
I have read in errata about blocking uart receiver(bug ID: 364) , but I don't
know it can be in my application.
Best regards
-===-
Tomasz Prochownik
MCD Electronics
33 861 60 35 w. 13
916 at mcd.com.pl
