this is my code for serial communication using 8051 iam trying to send letter B on serial port but iam not getting any thig on heperterminal though all setting are ok .so not getting what the problem is.
ORG 000H MOV TMOD,#20H MOV TH1,#0FAH MOV SCON,#50H SETB TR1 MOV A,#'B' ACALL DELAY A_1: MOV SBUF,A H_1: JNB TI, H_1 CLR TI SJMP A_1 DELAY: MOV R0,#255 L1: DJNZ R0,L1 MOV R1,#255 L2: DJNZ R1,L2 RET end
this is my code WRONG!!! NOTHING without comments can be called 'code' what you show is 'scribbles'.
Anyhow one of the problems you have is that you are not aware of how TI works, you mix 'knowledge' of interrupt driven UART in with your polled routine.
read up on the UART in 'the bible"
another issue is that a timer does not drive the UART if it is not running.
read up on the timers in 'the bible"
Erik
here are the links to "the bible" Chapter 1 - 80C51 Family Architecture: www.nxp.com/.../80C51_FAM_ARCH_1.pdf
Chapter 2 - 80C51 Family Programmer’s Guide and Instruction Set: www.nxp.com/.../80C51_FAM_PROG_GUIDE_1.pdf
Chapter 3 - 80C51 Family Hardware Description: www.nxp.com/.../80C51_FAM_HARDWARE_1.pdf
WRONG!!! NOTHING without comments can be called 'code'
void main(void) { printf("No comments, but action is obvious?\n"); }
Another silly statement
That's not even code. I'd call it pseudo-code pretending to be C.
Obvious ? Where's your printf going to ? UART ? Screen ? Some other interface ? How is anyone supposed to know ? Where's your printf coming from ? A library ? Did you roll your own ?
"Did you roll your own ?"
I don't indulge in such disgusting habits!
extern void My_Function_To_Send_String_To_Uart_At_9600_Baud(char *); void main(void) { My_Function_To_Send_String_To_Uart_At_9600_Baud("No comments, but action is obvious?\n"); }