Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
10/28/05 10:06
Read: times


 		 #103076 - the biggest sin
Responding to: ???'s previous message
The biggest sin of posters to this Forum is not reading the manual completely. The second next is to post a typed-in code, not copy/pasted the real one.

This line certainly results in error when you attempt to assemble it:
U Kaz said:
Save This Code
MOV T2CON,#4CH     timer, counting upwards


But your real problem lies in this line:
U Kaz said:
Save This Code
MOV T2MOD,#02H    ;initialising timer 2 as auto-reload 16 bit

because
AT89S8252 datasheet (doc0401.pdf, rev.F) on page 16 said:
Programmable Clock Out

A 50% duty cycle clock can be programmed to come out on P1.0, as shown in Figure 5. [..] To configure the Timer/Counter 2 as a clock generator, bit C/T2 (T2CON.1) must be cleared and bit T2OE (T2MOD.1) must be set. [...]
In the clock-out mode, Timer 2 rollovers will not generate an interrupt,. [...]


Jan Waclawek

List of 27 messages in thread
TopicAuthorDate
Timer 2 in AT89S8252            01/01/70 00:00      
   most often, a '51 datasheet does not            01/01/70 00:00      
      continuing the above            01/01/70 00:00      
   Timer 2 for PWM...            01/01/70 00:00      
      one caution            01/01/70 00:00      
   PWM example code:            01/01/70 00:00      
   Time 2 problem            01/01/70 00:00      
      you are missing this one            01/01/70 00:00      
         I think I have covered that            01/01/70 00:00      
            RCAP2            01/01/70 00:00      
               Program with changes but still problem            01/01/70 00:00      
                  RCAP2 wrong            01/01/70 00:00      
                     Still no good            01/01/70 00:00      
                        So where do you expect the interrupt to            01/01/70 00:00      
                           why enable UART interrupt??            01/01/70 00:00      
                              sorry, early morning here            01/01/70 00:00      
                                 Is it still too early?            01/01/70 00:00      
                                    no and, please read the datasheet            01/01/70 00:00      
            I highlighted "must be cleared by            01/01/70 00:00      
   Has anyone used it ?            01/01/70 00:00      
      the biggest sin            01/01/70 00:00      
         Are you sure?            01/01/70 00:00      
            Jan is right            01/01/70 00:00      
               so am I            01/01/70 00:00      
            No, of course the datsheets are just nov            01/01/70 00:00      
            the third sin            01/01/70 00:00      
               Does this work on anyone's simulator?            01/01/70 00:00      

Back to Subject List