TIMER Registers: Difference between revisions
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| Line 13: | Line 13: | ||
| 0x10003000 + 4*n | | 0x10003000 + 4*n | ||
| 2 | | 2 | ||
| | | Boot9, Kernel9 | ||
|- | |- | ||
| style="background: green" | Yes | | style="background: green" | Yes | ||
| Line 19: | Line 19: | ||
| 0x10003002 + 4*n | | 0x10003002 + 4*n | ||
| 2 | | 2 | ||
| | | Boot9, Kernel9 | ||
|} | |} | ||
== TIMER_VAL == | == TIMER_VAL == | ||
Writing to | Writing to TIMER_VAL loads a starting value for one of the 4 timers, while reading it will show the current timer value. | ||
== TIMER_CNT == | == TIMER_CNT == | ||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
! Bit | |||
! | ! Description | ||
! | |||
|- | |- | ||
| 0 | | 1-0 | ||
| Prescaler select (0=F/1, 1=F/64, 2=F/256, 3=F/1024) | | Prescaler select (0=F/1, 1=F/64, 2=F/256, 3=F/1024) | ||
|- | |- | ||
| Line 37: | Line 36: | ||
| Count-up (0=Disabled, 1=Enabled) | | Count-up (0=Disabled, 1=Enabled) | ||
|- | |- | ||
| 3 | | 5-3 | ||
| Not used | | Not used | ||
|- | |- | ||
Revision as of 02:48, 6 January 2017
There are 4 timers. These timers run at a frequency of ~67027.964kHz.
Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | TIMER_VAL(n) | 0x10003000 + 4*n | 2 | Boot9, Kernel9 |
| Yes | TIMER_CNT(n) | 0x10003002 + 4*n | 2 | Boot9, Kernel9 |
TIMER_VAL
Writing to TIMER_VAL loads a starting value for one of the 4 timers, while reading it will show the current timer value.
TIMER_CNT
| Bit | Description |
|---|---|
| 1-0 | Prescaler select (0=F/1, 1=F/64, 2=F/256, 3=F/1024) |
| 2 | Count-up (0=Disabled, 1=Enabled) |
| 5-3 | Not used |
| 6 | IRQ enable (0=Disabled, 1=IRQ on timer value overflow) |
| 7 | Start/Stop (0=Stop, 1=Start) |
Count-up
When count-up is enabled, the timer value will increase every time the previous timer overflows.