avr: some formatting.

avr/timer.asm

@@ -30,7 +30,7 @@ timerModuleTickCounter:      .byte 1
 timerModuleFlags:            .byte 1
 timerModuleCounterSecs:      .byte 4
 
-timerModuleDerivedCounters:  .byte 10 ; must correspond to entries in timer table!
+timerModuleDerivedCounters:  .byte 10 ; size must be number of entries in timer table
 
 timerModuleData_end:
 
@@ -70,7 +70,7 @@ timerTable:
 ; - nothing
 ; USED: r16, r17, x
 
-Timer_Init:            ; setup timer for 15.2588 interrupts per second (e.g. every 65.5 ms)
+Timer_Init:            ; setup timer for IRQ every 100ms
   ; reset data in SDRAM
   ldi xh, HIGH(timerModuleData)
   ldi xl, LOW(timerModuleData)
@@ -153,7 +153,7 @@ Timer_Run_1s_passed:
 
 
 ; ---------------------------------------------------------------------------
-; Increment cascading timer counters.
+; Increment cascading timer counters. Called once every second.
 ;
 ; This routine starts with the first cascaded counter and increments it.
 ; If that counter value does not overflow (according to timer table entry) then
@@ -226,8 +226,6 @@ timerCallFirstOnEveryHandlers:
   
   ldi zl, LOW(timerTable*2)
   ldi zh, HIGH(timerTable*2)
-  ldi xl, LOW(timerModuleDerivedCounters)  ; points to first counter: timerModuleCounterFor10s
-  ldi xh, HIGH(timerModuleDerivedCounters)
 
 timerCallFirstOnEveryHandlers_loop:
     lpm r17, Z                               ; overflow value
@@ -237,16 +235,11 @@ timerCallFirstOnEveryHandlers_loop:
     lpm r20, Z+                              ; read handler address
     lpm r21, Z+
     push r16                                 ; call handler
-      push xl
-        push xh
       push zl
         push zh
-              ld r16, X+                    ; current counter value
           rcall timerCallR21R20
         pop zh
       pop zl
-        pop xh
-      pop xl
     pop r16
     dec r16
   brne timerCallFirstOnEveryHandlers_loop