Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 52)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 52 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
tmr0_isr()
Reset tmr0 SW watchdog
yes
no
Restart timer?
Reload with TH0, TL0
Run timer routine for
application
END
Stop timer
application needs
timer0?
no
yes
tmr1_isr()
Reset tmr1 SW watchdog
yes
no
Restart timer?
Reload with TH1, TL1
Run timer routine for
application
END
Stop timer
application needs
timer1?
no
yes
Figure 5-6: Timer ISRs
pTimers =
&Timers[NUM_TIMERS)
i = NUM_TIMERS
stm_run()
N
tick_cnt<>0
Timer present?
Timer expired?
Timer expired
function?
execute Timer expired
function.
N
N
--i == 0
N
pTimers =
&Timers[NUM_TIMERS)
i = NUM_TIMERS
tmr_stop
i == 0 ?
Timer present?
N
--i == 0 ?
N
N
END
Y
Figure 5-7: stm_run() - Process Software Timers (non-ISR)