Mon51 funktioniert nicht mit externer Uart

yes -- i know that it should support external uart - i will use this and i read many many times the manual.

I also know the install.a51

My uart is at this moment in the same Xram (and Code space - as descibed in manual {chapter 3/page 14})

At this time i used the same configuration as the Keil eval board - but the unused I/O are used for my specific hardware enviroment)

This is not the problem.

I had some questions about the install.a51
**********************************************************************************
1. -- how would for serialtype 6 the bauddiv register initialised?

Ok -- i see the formel :
BAUDDIV EQU (SIOCLK / 16) / BAUDRATE

this is correct -- but the parser cant handele the value of SIOCLK if this is bigger 65535 - <and so the generated value for Bauddiv is 0 -- from where i know it?
i see it in the disassembled generated mon51.hex

the next problem -- in the hardware manual for the external uart the interrupt IE0 is used - how ?
did somewhere see a using of this in install.a51?

I see at IE0 the code :
LJMP INT_ADR_OFF + 03H

if external uart is used for me should then stay at IE0 - location

LJMP SER_ISR

the next question

If the external int is used by the monitor then how ?

if serial 6 is used in install.a51 the

I see in the serial 6 section the following:

SER_INT_ADR EQU 23H ;

is used, why ?

I think external serial interrupt bin is connected to IE0

so for me there should stay
SER_INT_ADR EQU 23H ;

ok... it would be nice if someone can answer my questions.

A other solution would be if someone have a MCBx51 board.


I can use the monitor memory dump and load it in the simulator of keil to see what is going on to use the external Uart -or what my mistake is.

for this if someone have the MCBx51 he must go following steps.
Set :
Uart_INT: ON
ext_Uart : ON
PAGE: OFF
Monitor: ON
51/151: ON

if this setting are correct,start the µvision debugger - with communication over
external uart.

in the debugger command window type in the following command:

save Monitor.hex C:0xE000, C:0xFFFF


send this to my e-mail.
Solo_Frank@web.de

with this -- i find the right solution.

best regards,
Frank



> You may have to actually try a copy-n-pasted version of it in your test program to be completely sure. <

The initialisation from install.a51 was used for test.

For the readout and writing to the uart i write some routines to emulate the readou and writing of the monitor....
But -- i didnt know how it is realized in mon51.lib

yes -- i know that it should support external uart - i will use this and i read many many times the manual.

I also know the install.a51

My uart is at this moment in the same Xram (and Code space - as descibed in manual {chapter 3/page 14})

At this time i used the same configuration as the Keil eval board - but the unused I/O are used for my specific hardware enviroment)

This is not the problem.

I had some questions about the install.a51
**********************************************************************************
1. -- how would for serialtype 6 the bauddiv register initialised?

Ok -- i see the formel :
BAUDDIV EQU (SIOCLK / 16) / BAUDRATE

this is correct -- but the parser cant handele the value of SIOCLK if this is bigger 65535 - <and so the generated value for Bauddiv is 0 -- from where i know it?
i see it in the disassembled generated mon51.hex

the next problem -- in the hardware manual for the external uart the interrupt IE0 is used - how ?
did somewhere see a using of this in install.a51?

I see at IE0 the code :
LJMP INT_ADR_OFF + 03H

if external uart is used for me should then stay at IE0 - location

LJMP SER_ISR

the next question

If the external int is used by the monitor then how ?

if serial 6 is used in install.a51 the

I see in the serial 6 section the following:

SER_INT_ADR EQU 23H ;

is used, why ?

I think external serial interrupt bin is connected to IE0

so for me there should stay
SER_INT_ADR EQU 23H ;

ok... it would be nice if someone can answer my questions.

A other solution would be if someone have a MCBx51 board.


I can use the monitor memory dump and load it in the simulator of keil to see what is going on to use the external Uart -or what my mistake is.

for this if someone have the MCBx51 he must go following steps.
Set :
Uart_INT: ON
ext_Uart : ON
PAGE: OFF
Monitor: ON
51/151: ON

if this setting are correct,start the µvision debugger - with communication over
external uart.

in the debugger command window type in the following command:

save Monitor.hex C:0xE000, C:0xFFFF


send this to my e-mail.
Solo_Frank@web.de

with this -- i find the right solution.

best regards,
Frank



> You may have to actually try a copy-n-pasted version of it in your test program to be completely sure. <

The initialisation from install.a51 was used for test.

For the readout and writing to the uart i write some routines to emulate the readou and writing of the monitor....
But -- i didnt know how it is realized in mon51.lib