mirror of
https://github.com/kalymos/PsNee.git
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458 lines
17 KiB
C++
458 lines
17 KiB
C++
// PsNee / psxdev.net version
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// For Arduino and ATtiny
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//
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// Quick start: Select your hardware via the #defines, compile + upload the code, install in PSX.
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// There are some pictures in the development thread ( http://www.psxdev.net/forum/viewtopic.php?f=47&t=1262&start=120 )
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// Beware to use the PSX 3.5V / 3.3V power, *NOT* 5V! The installation pictures include an example.
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//
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// Arduinos:
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// Use #define ARDUINO_328_BOARD for the following:
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// - Arduino Pro Mini @8Mhz and @16Mhz (supported, tested)
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// - Arduino Uno @8Mhz and @16Mhz (supported, tested)
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// Use #define ARDUINO_32UX_BOARD for the following:
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// - Pro Micro (supported, tested)
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// - Arduino Leonardo (supported, untested)
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// ATtiny:
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// - ATtiny85: Should work the same as ATtiny45 (supported, untested)
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// - ATtiny45: LFUSE 0xE2 HFUSE 0xDF > internal oscillator, full 8Mhz speed (supported, tested)
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// - ATtiny25: Should work the same as ATtiny45 but doesn't have enough Flash nor RAM for PSNEEDEBUG (supported, untested)
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// - Use #define ATTINY_X5
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//
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// To use ATtiny with the Arduino environment, an ATtiny core has to be installed.
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//
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// PAL PM-41 consoles are supported with #define APPLY_PSONE_PAL_BIOS_PATCH,
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// but only on boards with ATmega chips (Arduinos).
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// Also, the Arduino must be flashed using SPI (deleting the bootloader), since I expect a signal ~1 second after power on.
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//
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// This code defaults to multi-region, meaning it will unlock PAL, NTSC-U and NTSC-J machines.
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// You can optimize boot times for your console further. See "// inject symbols now" in the main loop.
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//+-------------------------------------------------------------------------------------------+
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//| Choose your hardware! |
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//+-------------------------------------------------------------------------------------------+
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//
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// To fix the timer problem with APPLY_PSONE_PAL_BIOS_PATCH look at line 223
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//
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// 2 main branches available:
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// - ATmega based > easy to use, fast and nice features for development, recommended
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// - ATtiny based > for minimal installs
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// ATmega32U4/32U2 boards (as in the Pro Micro) have to use different pinouts than the 'regular'
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// Arduino ATMega328's. For these, a different define must be used.
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//#define ARDUINO_328_BOARD
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//#define ARDUINO_32UX_BOARD
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//#define ATTINY_X5
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//#define APPLY_PSONE_PAL_BIOS_PATCH
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//#define PSNEEDEBUG
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#include <avr/pgmspace.h>
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#if defined(ARDUINO_328_BOARD)
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// board pins (code requires porting to reflect any changes)
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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#define BIOS_A18 3 // connect to PSOne BIOS A18 (pin 31 on that chip)
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#define BIOS_D2 4 // connect to PSOne BIOS D2 (pin 15 on that chip)
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#endif
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#define sqck 6 // connect to PSX HC-05 SQCK pin
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#define subq 7 // connect to PSX HC-05 SUBQ pin
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#define data 8 // connect to point 6 in old modchip diagrams
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#define gate_wfck 9 // connect to point 5 in old modchip diagrams
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// MCU I/O definitions
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#define SUBQPORT PIND // MCU port for the 2 SUBQ sampling inputs
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#define SQCKBIT 6 // PD6 "SQCK" < Mechacon pin 26 (PU-7 and early PU-8 Mechacons: pin 41)
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#define SUBQBIT 7 // PD7 "SUBQ" < Mechacon pin 24 (PU-7 and early PU-8 Mechacons: pin 39)
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#define GATEWFCKPORT PINB // MCU port for the gate input (used for WFCK)
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#define DATAPORT PORTB // MCU port for the gate input (used for WFCK)
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#define GATEWFCKBIT 1 // PB1
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#define DATABIT 0 // PB0
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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#define BIOSPATCHPORTIN PIND
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#define BIOSPATCHPORTOUT PORTD
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#define BIOSPATCHDDR DDRD
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#define BIOS_A18_BIT 4
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#define BIOS_D2_BIT 5
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#endif
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#elif defined(ARDUINO_32UX_BOARD) // ATMega32U2/ATMega32U4
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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#define BIOS_A18 2
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#define BIOS_D2 3
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#endif
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#define sqck 4
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#define subq 6
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#define data 8
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#define gate_wfck 9
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// MCU I/O definitions
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#define SUBQPORT PIND
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#define SQCKBIT 1 //
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#define SUBQBIT 0 //
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#define GATEWFCKPORT PINB
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#define DATAPORT PORTB
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#define GATEWFCKBIT 1 //
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#define DATABIT 3 //
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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#define BIOSPATCHPORTIN PIND
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#define BIOSPATCHPORTOUT PORTD
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#define BIOSPATCHDDR DDRD
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#define BIOS_A18_BIT 2 //PB4
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#define BIOS_D2_BIT 3 //PB5
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#endif
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#elif defined(ATTINY_X5) // ATtiny 25/45/85
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// extras
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#define USINGSOFTWARESERIAL
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// board pins (Do not change. Changing pins requires adjustments to MCU I/O definitions)
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#define sqck 0
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#define subq 1
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#define data 2
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#define gate_wfck 4
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#define debugtx 3
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// MCU I/O definitions
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#define SUBQPORT PINB
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#define SQCKBIT 0
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#define SUBQBIT 1
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#define GATEWFCKPORT PINB
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#define DATAPORT PORTB
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#define GATEWFCKBIT 4
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#define DATABIT 2
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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#error "ATtiny does not support PAL PSOne patch yet!"
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#endif
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#else
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#error "Select a board!"
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#endif
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#if defined(PSNEEDEBUG) && defined(USINGSOFTWARESERIAL)
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#include <SoftwareSerial.h>
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SoftwareSerial mySerial(-1, 3); // RX, TX. (RX -1 = off)
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#define DEBUG_PRINT(x) mySerial.print(x)
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#define DEBUG_PRINTHEX(x) mySerial.print(x, HEX)
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#define DEBUG_PRINTLN(x) mySerial.println(x)
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#define DEBUG_FLUSH mySerial.flush()
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#elif defined(PSNEEDEBUG) && !defined(USINGSOFTWARESERIAL)
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#define DEBUG_PRINT(x) Serial.print(x)
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#define DEBUG_PRINTHEX(x) Serial.print(x, HEX)
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#define DEBUG_PRINTLN(x) Serial.println(x)
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#define DEBUG_FLUSH Serial.flush()
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#else
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#define DEBUG_PRINT(x)
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#define DEBUG_PRINTHEX(x)
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#define DEBUG_PRINTLN(x)
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#define DEBUG_FLUSH
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#endif
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#define NOP __asm__ __volatile__ ("nop\n\t")
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// Setup() detects which (of 2) injection methods this PSX board requires, then stores it in pu22mode.
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boolean pu22mode;
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//Timing
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const int delay_between_bits = 4000; // 250 bits/s (microseconds) (ATtiny 8Mhz works from 3950 to 4100)
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const int delay_between_injections = 90; // 72 in oldcrow. PU-22+ work best with 80 to 100 (milliseconds)
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// borrowed from AttyNee. Bitmagic to get to the SCEX strings stored in flash (because Harvard architecture)
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bool readBit(int index, const unsigned char *ByteSet)
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{
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int byte_index = index >> 3;
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byte bits = pgm_read_byte(&(ByteSet[byte_index]));
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int bit_index = index & 0x7; // same as (index - byte_index<<3) or (index%8)
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byte mask = 1 << bit_index;
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return (0 != (bits & mask));
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}
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void inject_SCEX(char region)
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{
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//SCEE: 1 00110101 00, 1 00111101 00, 1 01011101 00, 1 01011101 00
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//SCEA: 1 00110101 00, 1 00111101 00, 1 01011101 00, 1 01111101 00
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//SCEI: 1 00110101 00, 1 00111101 00, 1 01011101 00, 1 01101101 00
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//const boolean SCEEData[44] = {1,0,0,1,1,0,1,0,1,0,0,1,0,0,1,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0};
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//const boolean SCEAData[44] = {1,0,0,1,1,0,1,0,1,0,0,1,0,0,1,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0};
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//const boolean SCEIData[44] = {1,0,0,1,1,0,1,0,1,0,0,1,0,0,1,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0};
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static const PROGMEM unsigned char SCEEData[] = {0b01011001, 0b11001001, 0b01001011, 0b01011101, 0b11101010, 0b00000010};
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static const PROGMEM unsigned char SCEAData[] = {0b01011001, 0b11001001, 0b01001011, 0b01011101, 0b11111010, 0b00000010};
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static const PROGMEM unsigned char SCEIData[] = {0b01011001, 0b11001001, 0b01001011, 0b01011101, 0b11011010, 0b00000010};
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// pinMode(data, OUTPUT) is used more than it has to be but that's fine.
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for (byte bit_counter = 0; bit_counter < 44; bit_counter++)
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{
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if (readBit(bit_counter, region == 'e' ? SCEEData : region == 'a' ? SCEAData : SCEIData) == 0)
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{
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pinMode(data, OUTPUT);
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bitClear(GATEWFCKPORT, DATABIT); // data low
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delayMicroseconds(delay_between_bits);
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}
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else
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{
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if (pu22mode) {
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pinMode(data, OUTPUT);
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unsigned long now = micros();
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do {
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bool wfck_sample = bitRead(GATEWFCKPORT, GATEWFCKBIT);
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bitWrite(DATAPORT, DATABIT, wfck_sample); // output wfck signal on data pin
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}
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while ((micros() - now) < delay_between_bits);
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}
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else { // PU-18 or lower mode
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pinMode(data, INPUT);
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delayMicroseconds(delay_between_bits);
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}
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}
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}
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pinMode(data, OUTPUT);
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bitClear(GATEWFCKPORT, DATABIT); // pull data low
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delay(delay_between_injections);
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}
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void NTSC_fix() {
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#if defined(APPLY_PSONE_PAL_BIOS_PATCH)
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pinMode(BIOS_A18, INPUT);
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pinMode(BIOS_D2, INPUT);
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delay(100); // this is right after SQCK appeared. wait a little to avoid noise
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while (!bitRead(BIOSPATCHPORTIN, BIOS_A18_BIT))
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{
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; //wait for stage 1 A18 pulse
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}
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delay(1350); //wait through stage 1 of A18 activity
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noInterrupts(); // start critical section
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while (!bitRead(BIOSPATCHPORTIN, BIOS_A18_BIT))
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{
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; //wait for priming A18 pulse
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}
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delayMicroseconds(17); // min 13us max 17us for 16Mhz ATmega (maximize this when tuning!)
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bitClear(BIOSPATCHPORTOUT, BIOS_D2_BIT); // store a low
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bitSet(BIOSPATCHDDR, BIOS_D2_BIT); // D2 = output. drags line low now
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delayMicroseconds(4); // min 2us for 16Mhz ATmega, 8Mhz requires 3us (minimize this when tuning, after maximizing first us delay!)
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bitClear(DDRD, BIOS_D2_BIT); // D2 = input / high-z
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interrupts(); // end critical section
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// not necessary but I want to make sure these pins are now high-z again
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pinMode(BIOS_A18, INPUT);
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pinMode(BIOS_D2, INPUT);
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#endif
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}
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//--------------------------------------------------
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// Setup
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//--------------------------------------------------
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void setup()
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{
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pinMode(data, INPUT);
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pinMode(gate_wfck, INPUT);
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pinMode(subq, INPUT); // PSX subchannel bits
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pinMode(sqck, INPUT); // PSX subchannel clock
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#if defined(PSNEEDEBUG) && defined(USINGSOFTWARESERIAL)
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pinMode(debugtx, OUTPUT); // software serial tx pin
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mySerial.begin(115200); // 13,82 bytes in 12ms, max for softwareserial. (expected data: ~13 bytes / 12ms) // update: this is actually quicker
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#elif defined(PSNEEDEBUG) && !defined(USINGSOFTWARESERIAL)
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Serial.begin(500000); // 60 bytes in 12ms (expected data: ~26 bytes / 12ms) // update: this is actually quicker
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DEBUG_PRINT("MCU frequency: "); DEBUG_PRINT(F_CPU); DEBUG_PRINTLN(" Hz");
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DEBUG_PRINTLN("Waiting for SQCK..");
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#endif
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#if defined(ARDUINO_328_BOARD) || defined(ARDUINO_32UX_BOARD)
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pinMode(LED_BUILTIN, OUTPUT); // Blink on injection / debug.
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digitalWrite(LED_BUILTIN, HIGH); // mark begin of setup
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#endif
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// wait for console power on and stable signals
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while (!digitalRead(sqck));
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while (!digitalRead(gate_wfck));
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// if enabled: patches PAL PSOne consoles so they start all region games
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NTSC_fix();
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// Board detection
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//
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// GATE: __----------------------- // this is a PU-7 .. PU-20 board!
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//
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// WFCK: __-_-_-_-_-_-_-_-_-_-_-_- // this is a PU-22 or newer board!
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unsigned int highs = 0, lows = 0;
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unsigned long now = millis();
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do {
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if (digitalRead(gate_wfck) == 1) highs++;
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if (digitalRead(gate_wfck) == 0) lows++;
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delayMicroseconds(200); // good for ~5000 reads in 1s
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}
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while ((millis() - now) < 1000); // sample 1s
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// typical readouts
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// PU-22: highs: 2449 lows: 2377
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if (lows > 100) {
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pu22mode = 1;
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}
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else {
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pu22mode = 0;
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}
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#ifdef ATTINY_X5
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DEBUG_PRINT("m "); DEBUG_PRINTLN(pu22mode);
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#else
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DEBUG_PRINT("highs: "); DEBUG_PRINT(highs); DEBUG_PRINT(" lows: "); DEBUG_PRINTLN(lows);
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DEBUG_PRINT("pu22mode: "); DEBUG_PRINTLN(pu22mode);
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// Power saving
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// Disable the ADC by setting the ADEN bit (bit 7) of the ADCSRA register to zero.
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ADCSRA = ADCSRA & B01111111;
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// Disable the analog comparator by setting the ACD bit (bit 7) of the ACSR register to one.
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ACSR = B10000000;
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// Disable digital input buffers on all analog input pins by setting bits 0-5 of the DIDR0 register to one.
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DIDR0 = DIDR0 | B00111111;
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#endif
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#if defined(ARDUINO_328_BOARD) || defined(ARDUINO_32UX_BOARD)
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digitalWrite(LED_BUILTIN, LOW); // setup complete
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#endif
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DEBUG_FLUSH; // empty serial transmit buffer
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}
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void loop()
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{
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static byte scbuf [12] = { 0 }; // We will be capturing PSX "SUBQ" packets, there are 12 bytes per valid read.
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static unsigned int timeout_clock_counter = 0;
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static byte bitbuf = 0; // SUBQ bit storage
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static bool sample = 0;
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static byte bitpos = 0;
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byte scpos = 0; // scbuf position
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// start with a small delay, which can be necessary in cases where the MCU loops too quickly
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// and picks up the laster SUBQ trailing end
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delay(1);
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noInterrupts(); // start critical section
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start:
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// Capture 8 bits for 12 runs > complete SUBQ transmission
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bitpos = 0;
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for (; bitpos < 8; bitpos++) {
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while (bitRead(SUBQPORT, SQCKBIT) == 1) {
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// wait for clock to go low..
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// a timeout resets the 12 byte stream in case the PSX sends malformatted clock pulses, as happens on bootup
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timeout_clock_counter++;
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if (timeout_clock_counter > 1000) {
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scpos = 0; // reset SUBQ packet stream
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timeout_clock_counter = 0;
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bitbuf = 0;
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goto start;
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}
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}
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// wait for clock to go high..
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while ((bitRead(SUBQPORT, SQCKBIT)) == 0);
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sample = bitRead(SUBQPORT, SUBQBIT);
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bitbuf |= sample << bitpos;
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timeout_clock_counter = 0; // no problem with this bit
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}
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// one byte done
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scbuf[scpos] = bitbuf;
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scpos++;
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bitbuf = 0;
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// repeat for all 12 bytes
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if (scpos < 12) {
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goto start;
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}
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interrupts(); // end critical section
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// log SUBQ packets. We only have 12ms to get the logs written out. Slower MCUs get less formatting.
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#ifdef ATTINY_X5
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if (!(scbuf[0] == 0 && scbuf[1] == 0 && scbuf[2] == 0 && scbuf[3] == 0)) { // a bad sector read is all 0 except for the CRC fields. Don't log it.
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for (int i = 0; i < 12; i++) {
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if (scbuf[i] < 0x10) {
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DEBUG_PRINT("0"); // padding
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}
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DEBUG_PRINTHEX(scbuf[i]);
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}
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DEBUG_PRINTLN("");
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}
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#else
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if (!(scbuf[0] == 0 && scbuf[1] == 0 && scbuf[2] == 0 && scbuf[3] == 0)) {
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for (int i = 0; i < 12; i++) {
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if (scbuf[i] < 0x10) {
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DEBUG_PRINT("0"); // padding
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}
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DEBUG_PRINTHEX(scbuf[i]);
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DEBUG_PRINT(" ");
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}
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DEBUG_PRINTLN("");
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}
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#endif
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// check if read head is in wobble area
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// We only want to unlock game discs (0x41) and only if the read head is in the outer TOC area.
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// We want to see a TOC sector repeatedly before injecting (helps with timing and marginal lasers).
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// All this logic is because we don't know if the HC-05 is actually processing a getSCEX() command.
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// Hysteresis is used because older drives exhibit more variation in read head positioning.
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// While the laser lens moves to correct for the error, they can pick up a few TOC sectors.
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static byte hysteresis = 0;
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boolean isDataSector = (((scbuf[0] & 0x40) == 0x40) && (((scbuf[0] & 0x10) == 0) && ((scbuf[0] & 0x80) == 0)));
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if (
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(isDataSector && scbuf[1] == 0x00 && scbuf[6] == 0x00) && // [0] = 41 means psx game disk. the other 2 checks are garbage protection
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(scbuf[2] == 0xA0 || scbuf[2] == 0xA1 || scbuf[2] == 0xA2 || // if [2] = A0, A1, A2 ..
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(scbuf[2] == 0x01 && (scbuf[3] >= 0x98 || scbuf[3] <= 0x02) ) ) // .. or = 01 but then [3] is either > 98 or < 02
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) {
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hysteresis++;
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}
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else if ( hysteresis > 0 &&
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((scbuf[0] == 0x01 || isDataSector) && (scbuf[1] == 0x00 /*|| scbuf[1] == 0x01*/) && scbuf[6] == 0x00)
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) { // This CD has the wobble into CD-DA space. (started at 0x41, then went into 0x01)
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hysteresis++;
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}
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else if (hysteresis > 0) {
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hysteresis--; // None of the above. Initial detection was noise. Decrease the counter.
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}
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|
|
|
// hysteresis value "optimized" using very worn but working drive on ATmega328 @ 16Mhz
|
|
// should be fine on other MCUs and speeds, as the PSX dictates SUBQ rate
|
|
if (hysteresis >= 14) {
|
|
// If the read head is still here after injection, resending should be quick.
|
|
// Hysteresis naturally goes to 0 otherwise (the read head moved).
|
|
hysteresis = 11;
|
|
|
|
#ifdef ATTINY_X5
|
|
DEBUG_PRINTLN("!");
|
|
#else
|
|
DEBUG_PRINTLN("INJECT!INJECT!INJECT!INJECT!INJECT!INJECT!");
|
|
#endif
|
|
#if defined(ARDUINO_328_BOARD) || defined(ARDUINO_32UX_BOARD)
|
|
digitalWrite(LED_BUILTIN, HIGH);
|
|
#endif
|
|
|
|
pinMode(data, OUTPUT);
|
|
digitalWrite(data, 0); // pull data low
|
|
if (!pu22mode) {
|
|
pinMode(gate_wfck, OUTPUT);
|
|
digitalWrite(gate_wfck, 0);
|
|
}
|
|
|
|
// HC-05 waits for a bit of silence (pin low) before it begins decoding.
|
|
delay(delay_between_injections);
|
|
// inject symbols now. 2 x 3 runs seems optimal to cover all boards
|
|
for (byte loop_counter = 0; loop_counter < 2; loop_counter++)
|
|
{
|
|
inject_SCEX('e'); // e = SCEE, a = SCEA, i = SCEI
|
|
inject_SCEX('a'); // injects all 3 regions by default
|
|
inject_SCEX('i'); // optimize boot time by sending only your console region letter (all 3 times per loop)
|
|
}
|
|
|
|
if (!pu22mode) {
|
|
pinMode(gate_wfck, INPUT); // high-z the line, we're done
|
|
}
|
|
pinMode(data, INPUT); // high-z the line, we're done
|
|
#if defined(ARDUINO_328_BOARD) || defined(ARDUINO_32UX_BOARD)
|
|
digitalWrite(LED_BUILTIN, LOW);
|
|
#endif
|
|
}
|
|
// keep catching SUBQ packets forever
|
|
}
|