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Fix broken timer fix bug fixes

This commit is contained in:
Guy Perfect 2024-12-26 13:23:56 -06:00
parent 4449acada0
commit b4feff41f0
1 changed files with 6 additions and 4 deletions
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10
core/timer.c
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@ -7,11 +7,11 @@
/* Compute clocks until the next decrement to zero */
static uint32_t tmrGetUntil(VB *sim) {
uint32_t full = (sim->tmr.reload + 1) * (sim->tmr.t_clk_sel ? 400 : 2000);
uint32_t cur = sim->tmr.clocks +
uint32_t fullTick = sim->tmr.t_clk_sel ? 400 : 2000;
uint32_t thisTick = sim->tmr.clocks +
(sim->tmr.t_clk_sel ? 0 : 400 * (4 - sim->tmr.tick20));
return sim->tmr.counter == 0 ?
sim->tmr.reload * full : (sim->tmr.counter - 1) * full + cur;
return thisTick + fullTick *
(sim->tmr.counter == 0 ? sim->tmr.reload : sim->tmr.counter - 1);
}
/* Update the counter to a new value */
@ -142,12 +142,14 @@ static void tmrWriteControl(VB *sim, uint8_t value) {
static void tmrWriteHigh(VB *sim, uint8_t value) {
sim->tmr.reload = (uint16_t) value << 8 | (sim->tmr.reload & 0x00FF);
tmrUpdate(sim, sim->tmr.reload);
sim->tmr.until = tmrGetUntil(sim);
}
/* Write to the low data register */
static void tmrWriteLow(VB *sim, uint8_t value) {
sim->tmr.reload = (sim->tmr.reload & 0xFF00) | value;
tmrUpdate(sim, sim->tmr.reload);
sim->tmr.until = tmrGetUntil(sim);
}