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Can't communicate with 8051 through RS-232

My Problem is that uVision always shows monitor 51 not connected.

I'm using keil c51 7.50 and uvision 3.05c. I want to use RS-232 interface communication with ATMEL "AT89S53"

1.
In the "option for target" window of Keil. I have following setting:
-------------------------------------------------------------
Target
Atmel AT89S53.
Memory Model: compact: variables in PDATA;
Code Rom Size: Compact: 2K functions, 64k programs.
Operation system:RTX-51 full.
----------------------------------------------------------------
Debug
Use: Keil Monitor-51 Driver
Port:COM 1
RTS:Active
Baudrate: 19200
DTR: Active.

Choose cache options for DATA, XDATA, IDATA, CODE.
choose serial interrupt.


Choose Load Application at Startup.
Choose Breakpoints, Watchpoints, Memory Display, Toolbox.
--------------------------------------------

However, in the Monitor-51 Identification, it always says" Monitor-51 not connected"


2.
The 8051 board i use is "MINI-MAX/51-C MICROCONTROL BOARD," made by BiPOM Electronics.
The 8051 chip is "ATMEL 89S53."

The spec is:
1.12K In-System Programmable Flash Memory.
2.256 bytes of RAM.
3.Nine bytes of RAM.
4.Three 16 bit Timer/ Counters
5.Programmable UART Serial Channel.
6.SPI Serial Interface.
7.Programmable Watchdog Timer.
8.32 general purpose I/O pins

3.
I have tried Micro-IDE software made by BiPOM, it can communicate with this board through RS-232 very well. Therefore, it seems the communiocation problem occurs in the Keil Software itself.

I really don't know what is going wrong, and this is my first time using 8051 system.
Could anybody help me?
RAY

Parents
  • Gents;
    You need to read Mr. Keil's message again. How did you install MON51 on your target board? Go to the PDF file in the MON51 Folder, Read the manual carefully to see how to configure a monitor for your target board.
    To my knowledge, Mon51 comes pre-installed only on the eval boards made or supported directly by Keil.

Reply
  • Gents;
    You need to read Mr. Keil's message again. How did you install MON51 on your target board? Go to the PDF file in the MON51 Folder, Read the manual carefully to see how to configure a monitor for your target board.
    To my knowledge, Mon51 comes pre-installed only on the eval boards made or supported directly by Keil.

Children