mirror of
https://github.com/dborth/vbagx.git
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283 lines
8.0 KiB
C++
283 lines
8.0 KiB
C++
#include "../System.h"
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#include "GBA.h"
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#include "Globals.h"
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#include "../common/Port.h"
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#include "../Util.h"
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#include "../NLS.h"
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#include "vmmem.h"
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#include <time.h>
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#include <string.h>
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#include <stdio.h>
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u8 systemGetSensorDarkness();
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int systemGetSensorZ();
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enum RTCSTATE { IDLE, COMMAND, DATA, READDATA };
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typedef struct {
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u8 byte0;
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u8 byte1;
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u8 byte2;
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u8 command;
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int dataLen;
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int bits;
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RTCSTATE state;
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u8 data[12];
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// reserved variables for future
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u8 reserved[12];
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bool reserved2;
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u32 reserved3;
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} RTCCLOCKDATA;
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static RTCCLOCKDATA rtcClockData;
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static bool rtcEnabled = false;
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static bool rtcWarioRumbleEnabled = false;
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void rtcEnable(bool e)
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{
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rtcEnabled = e;
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}
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bool rtcIsEnabled()
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{
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return rtcEnabled;
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}
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void rtcEnableWarioRumble(bool e)
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{
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if (e) rtcEnable(true);
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rtcWarioRumbleEnabled = e;
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}
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u16 rtcRead(u32 address)
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{
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if(rtcEnabled) {
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switch(address){
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case 0x80000c8:
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return rtcClockData.byte2;
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break;
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case 0x80000c6:
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return rtcClockData.byte1;
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break;
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case 0x80000c4:
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// Boktai Solar Sensor
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if (rtcClockData.byte1 == 7) {
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if (rtcClockData.reserved[11] >= systemGetSensorDarkness()) {
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rtcClockData.reserved[10] = 0;
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rtcClockData.reserved[11] = 0;
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return 8;
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} else return 0;
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// WarioWare Twisted Tilt Sensor
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} else if (rtcClockData.byte1 == 0x0b) {
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//sprintf(DebugStr, "Reading Twisted Sensor bit %d", rtcClockData.reserved[11]);
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u16 v = systemGetSensorZ();
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return ((v >> rtcClockData.reserved[11]) & 1) << 2;
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// Real Time Clock
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} else {
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//sprintf(DebugStr, "Reading RTC %02x, %02x, %02x", rtcClockData.byte0, rtcClockData.byte1, rtcClockData.byte2);
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return rtcClockData.byte0;
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}
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break;
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}
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}
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#ifdef USE_VM
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return VMRead16( address & 0x1FFFFFE );
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#else
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return READ16LE((&rom[address & 0x1FFFFFE]));
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#endif
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}
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static u8 toBCD(u8 value)
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{
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value = value % 100;
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int l = value % 10;
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int h = value / 10;
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return h * 16 + l;
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}
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bool rtcWrite(u32 address, u16 value)
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{
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if(!rtcEnabled)
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return false;
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if(address == 0x80000c8) {
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rtcClockData.byte2 = (u8)value; // bit 0 = enable reading from 0x80000c4 c6 and c8
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} else if(address == 0x80000c6) {
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rtcClockData.byte1 = (u8)value; // 0=read/1=write (for each of 4 low bits)
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// rumble is off when not writing to that pin
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if (rtcWarioRumbleEnabled && !(value & 8)) systemCartridgeRumble(false);
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} else if(address == 0x80000c4) { // 4 bits of I/O Port Data (upper bits not used)
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// WarioWare Twisted rumble
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if(rtcWarioRumbleEnabled && (rtcClockData.byte1 & 8)) {
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systemCartridgeRumble(value & 8);
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}
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// Boktai solar sensor
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if (rtcClockData.byte1 == 7) {
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if (value & 2) {
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// reset counter to 0
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rtcClockData.reserved[11]=0;
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rtcClockData.reserved[10]=0;
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}
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if ((value & 1) && (!(rtcClockData.reserved[10] & 1))) {
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// increase counter, ready to do another read
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if (rtcClockData.reserved[11]<255) rtcClockData.reserved[11]++;
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}
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rtcClockData.reserved[10] = value & rtcClockData.byte1;
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}
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// WarioWare Twisted rotation sensor
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if (rtcClockData.byte1 == 0xb) {
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if (value & 2) {
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// clock goes high in preperation for reading a bit
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rtcClockData.reserved[11]--;
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}
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if (value & 1) {
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// start ADC conversion
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rtcClockData.reserved[11] = 15;
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}
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rtcClockData.byte0 = value & rtcClockData.byte1;
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// Real Time Clock
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}
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/**/
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if(rtcClockData.byte2 & 1) { // if reading is enabled
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if(rtcClockData.state == IDLE && rtcClockData.byte0 == 1 && value == 5) {
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rtcClockData.state = COMMAND;
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rtcClockData.bits = 0;
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rtcClockData.command = 0;
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} else if(!(rtcClockData.byte0 & 1) && (value & 1)) { // bit transfer
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rtcClockData.byte0 = (u8)value;
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switch(rtcClockData.state) {
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case COMMAND:
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rtcClockData.command |= ((value & 2) >> 1) << (7-rtcClockData.bits);
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rtcClockData.bits++;
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if(rtcClockData.bits == 8) {
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rtcClockData.bits = 0;
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switch(rtcClockData.command) {
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case 0x60:
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// not sure what this command does but it doesn't take parameters
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// maybe it is a reset or stop
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rtcClockData.state = IDLE;
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rtcClockData.bits = 0;
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break;
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case 0x62:
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// this sets the control state but not sure what those values are
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rtcClockData.state = READDATA;
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rtcClockData.dataLen = 1;
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break;
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case 0x63:
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rtcClockData.dataLen = 1;
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rtcClockData.data[0] = 0x40;
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rtcClockData.state = DATA;
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break;
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case 0x64:
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break;
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case 0x65:
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{
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struct tm *newtime;
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time_t long_time;
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time( &long_time ); /* Get time as long integer. */
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newtime = localtime( &long_time ); /* Convert to local time. */
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rtcClockData.dataLen = 7;
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rtcClockData.data[0] = toBCD(newtime->tm_year);
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rtcClockData.data[1] = toBCD(newtime->tm_mon+1);
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rtcClockData.data[2] = toBCD(newtime->tm_mday);
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rtcClockData.data[3] = toBCD(newtime->tm_wday);
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rtcClockData.data[4] = toBCD(newtime->tm_hour);
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rtcClockData.data[5] = toBCD(newtime->tm_min);
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rtcClockData.data[6] = toBCD(newtime->tm_sec);
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rtcClockData.state = DATA;
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}
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break;
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case 0x67:
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{
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struct tm *newtime;
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time_t long_time;
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time( &long_time ); /* Get time as long integer. */
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newtime = localtime( &long_time ); /* Convert to local time. */
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rtcClockData.dataLen = 3;
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rtcClockData.data[0] = toBCD(newtime->tm_hour);
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rtcClockData.data[1] = toBCD(newtime->tm_min);
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rtcClockData.data[2] = toBCD(newtime->tm_sec);
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rtcClockData.state = DATA;
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}
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break;
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default:
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systemMessage(0, N_("Unknown RTC command %02x"), rtcClockData.command);
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rtcClockData.state = IDLE;
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break;
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}
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}
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break;
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case DATA:
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if(rtcClockData.byte1 & 2) {
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} else {
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rtcClockData.byte0 = (rtcClockData.byte0 & ~2) |
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((rtcClockData.data[rtcClockData.bits >> 3] >>
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(rtcClockData.bits & 7)) & 1)*2;
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rtcClockData.bits++;
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if(rtcClockData.bits == 8*rtcClockData.dataLen) {
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rtcClockData.bits = 0;
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rtcClockData.state = IDLE;
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}
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}
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break;
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case READDATA:
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if(!(rtcClockData.byte1 & 2)) {
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} else {
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rtcClockData.data[rtcClockData.bits >> 3] =
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(rtcClockData.data[rtcClockData.bits >> 3] >> 1) |
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((value << 6) & 128);
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rtcClockData.bits++;
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if(rtcClockData.bits == 8*rtcClockData.dataLen) {
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rtcClockData.bits = 0;
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rtcClockData.state = IDLE;
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}
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}
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break;
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default:
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break;
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}
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} else
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rtcClockData.byte0 = (u8)value;
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}
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}
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return true;
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}
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void rtcReset()
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{
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memset(&rtcClockData, 0, sizeof(rtcClockData));
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rtcClockData.byte0 = 0;
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rtcClockData.byte1 = 0;
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rtcClockData.byte2 = 0;
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rtcClockData.command = 0;
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rtcClockData.dataLen = 0;
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rtcClockData.bits = 0;
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rtcClockData.state = IDLE;
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rtcClockData.reserved[11] = 0;
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}
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void rtcSaveGame(gzFile gzFile)
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{
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utilGzWrite(gzFile, &rtcClockData, sizeof(rtcClockData));
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}
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void rtcReadGame(gzFile gzFile)
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{
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utilGzRead(gzFile, &rtcClockData, sizeof(rtcClockData));
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}
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