Want to ask if anyone know I with single-chip microcomputer serial string sent procedures, sent to the computer, send the results to receive (hexadecimal), but the received data on PC is highest is 1, 0 x00 to send, receive 0 x80, send 0 XFF, receive 0 XFF, I began to think is hardware problem, with examples of ti send characters, can display properly,

In addition, I found that many examples in the while (! (IFG1 & amp; UTXIFG0)); This statement is to ensure that is sent, but I use will be stuck in this on the single chip microcomputer, can only use the while (! (U0CTL & amp; TXEPT)),
For bosses to solve