Post by thread:[PIC:] 16f628 uart weirdness: TRMT stuck?

I'm using the 16f628's built-in uart (fwiw: 4MHz clock, asynchronous 31.25k baud, 8 bit). For output, I wait for TXSTA<TRMT> before writing to TXREG. Meanwhile, incoming serial data is handled by interrupt. This mostly works, but every once in a while (actually quite often) TXSTA<TRMT> gets stuck on 0 and never goes to 1(!). Have you ever heard of this problem? Any suggestions welcomed. It *seems* to occur when serial input and output are happening concurrently, but that's just my impression. Hope someone can help me out. --m _________________________________________________________________ It s our best dial-up Internet access offer: 6 months @$9.95/month. Get it now! http://join.msn.com/?page=dept/dialup -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

Michael Park wrote: > For output, I wait for TXSTA<TRMT> before writing to TXREG. You should wait for PIR1,TXIF instead. That tells you when TXREG can accept another byte. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu