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Correct accuracy of poll interval settings on 2-player adapters

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The pauses recently introduced for supporting the Brawler 64 wireless
work fine in single-player mode (i.e. the poll interval setting in
the adapter manager is honored), but in two-player mode, the pauses
add up and the actual polling rate was slower than what was requested.

This corrects the issue, but unfortunately, on dual port adapters,
this means that a setting of 4ms or higher is needed to use a Brawler 64.
This commit is contained in:
Raphael Assenat 2021-03-04 15:47:12 +09:00
parent 5d06a6d6a3
commit a698f8cd06
1 changed files with 31 additions and 8 deletions
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39
n64.c
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@ -22,6 +22,7 @@
#include "n64.h"
#include "gcn64_protocol.h"
#include "eeprom.h"
#include "main.h" // for num_players
#undef BUTTON_A_RUMBLE_TEST
@ -113,15 +114,37 @@ static char n64Update(unsigned char chn)
/* The brawler 64 wireless gamepad does not like when the get caps command is followed
* too closely by the get status command. Without a long pause between the two commands,
* it just returns an all zeros. */
if (g_eeprom_data.cfg.poll_interval[0] >= 4) {
_delay_ms(2.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 3) {
_delay_ms(1.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 2) {
_delay_ms(1.25); // does not work at 1ms
* it just returns all zeros. */
if (num_players > 1) {
// n64Update is called two times on two-player adapters. This
// means time lost waiting here doubles. Without this, the controllers
// are no longer being polled at the rate set in the gui, which is bad.
// (I want this setting to be reliable)
//
// So on dual port adapters, brawler 64 wireless controllers will be
// usable only at intervals >= 4ms.
//
// TODO: Interleave access like this to allow a higher polling
// frequency: Read caps port 1, Read caps port 2, delay, Read status port 1,
// read status port 2. (Maybe this could make 3ms intervals work)
//
if (g_eeprom_data.cfg.poll_interval[0] >= 8) {
_delay_ms(2.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 6) {
_delay_ms(1.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 4) {
_delay_ms(1.25);
}
}
else {
if (g_eeprom_data.cfg.poll_interval[0] >= 4) {
_delay_ms(2.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 3) {
_delay_ms(1.5);
} else if (g_eeprom_data.cfg.poll_interval[0] >= 2) {
_delay_ms(1.25); // does not work at 1ms
}
}
/* Detect when a pack becomes present and schedule initialisation when it happens. */
if ((caps[2] & 0x01) && (n64_rumble_state[chn] == RSTATE_UNAVAILABLE)) {