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gary X31 Posted
8-Jan-2005 19:48 Toolset
C51 |  Can't simulate the Serial Port?? gary X31 Dear ALL,
I have tried to program the serial port and simulated the serial port under the Keil.
But it seems could work.
All the related registers I have checked.
The program just won't get into the uart_sub and loop in the main_loop.
;;Test Program
;;UART always send 0x41h out
org 0000h
ljmp start
org 0023h ;serial communication int
ljmp uart_sub
org 0030h
start:
mov sp,#060h
;------UART Setting Start---------------------------------------------
mov tmod,#00100000b ;Timer0 Mode1,Timer1 Mode2
mov th1,#0fdh
setb tr1
mov scon,#01010000b ;enable Receive
mov ie,#10010000b ;enable UART Interrupt
;------UART Setting End-----------------------------------------------
main_loop:
;;UART test start
mov a,#041h
mov sbuf,a
jmp main_loop
;;UART test end
;;------------------------------------------
;;
;; UART Subroutine Start
;;
;;------------------------------------------
uart_sub:
push psw
push acc
jbc ri,rcv_data
clr ti
jmp uart_done
rcv_data: COM port got data
mov a,sbuf
mov uart_buffer,a
uart_done:
pop acc
pop psw
reti
;;---------------------------------------------------------------------------------
;;
;; UART Subroutine End
;;
;;---------------------------------------------------------------------------------
end | | Read-Only Author
A.W. Neil Posted
9-Jan-2005 20:49 Toolset
C51 | RE: Can't simulate the Serial Port?? A.W. Neil You need to start by reading the uVision Getting Started Guide, and working through the example projects in it.
This will give you a proper introduction to the tools, how they work, and how to use them - rather than just jumping-in blindly at the deep end.
(The uVision Getting Started Guide is available on the 'Books' tab in the 'Project' Window; The 'Books' window is also available via the 'Help' menu; failing all that, search for GS51.PDF in your Keil folder)
Having done this, you should know how to use the simulates serial port... | |
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