mirror of
https://github.com/sanni/cartreader.git
synced 2024-12-30 15:01:53 +01:00
481 lines
15 KiB
C++
481 lines
15 KiB
C++
/********************************************************************
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* Open Source Cartridge Reader */
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/*H******************************************************************
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* FILENAME : OSCR.cpp
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*
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* DESCRIPTION :
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* Contains various enums, variables, etc, for the main program.
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*
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* PUBLIC FUNCTIONS :
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* void setClockScale( ClockScale )
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* VOLTS setVoltage( Voltage )
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* long configGetLong( Key, OnFailure )
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* String configGetStr( Key )
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*
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* NOTES :
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* This file is a WIP, I've been moving things into it on my local working
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* copy, but they are not ready yet. Rather than put this in the main file
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* only to move them back again, I decided to commit it early. If you need
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* to add new globals, enums, defines, etc, please use this file!
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*
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* LICENSE :
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* CHANGES :
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*
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* REF NO VERSION DATE WHO DETAIL
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* 13.2 2024-03-02 Ancyker Add string constants
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* 13.2 2024-02-29 Ancyker Add config support
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* 12.5 2023-03-29 Ancyker Initial version
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*
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*H*/
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#include "OSCR.h"
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/*==== CONSTANTS ==================================================*/
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/**
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* String Constants
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**/
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// Firmware Version
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constexpr char PROGMEM FSTRING_VERSION[] = "V14.5";
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// Universal
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constexpr char PROGMEM FSTRING_RESET[] = "Reset";
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constexpr char PROGMEM FSTRING_OK[] = "OK";
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constexpr char PROGMEM FSTRING_EMPTY[] = "";
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constexpr char PROGMEM FSTRING_SPACE[] = " ";
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constexpr char PROGMEM FSTRING_CURRENT_SETTINGS[] = "CURRENT SETTINGS";
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// Messages
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constexpr char PROGMEM FSTRING_OSCR[] = "OSCR";
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constexpr char PROGMEM FSTRING_MODULE_NOT_ENABLED[] = "Module is not enabled.";
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constexpr char PROGMEM FSTRING_DATABASE_FILE_NOT_FOUND[] = "Database file not found";
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constexpr char PROGMEM FSTRING_FILE_DOESNT_EXIST[] = "File doesn't exist";
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// Cart
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constexpr char PROGMEM FSTRING_READ_ROM[] = "Read ROM";
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constexpr char PROGMEM FSTRING_READ_SAVE[] = "Read Save";
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constexpr char PROGMEM FSTRING_WRITE_SAVE[] = "Write Save";
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constexpr char PROGMEM FSTRING_SELECT_CART[] = "Select Cart";
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constexpr char PROGMEM FSTRING_SELECT_CART_TYPE[] = "Select Cart Type";
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constexpr char PROGMEM FSTRING_SELECT_FILE[] = "Select file";
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constexpr char PROGMEM FSTRING_SET_SIZE[] = "Set Size";
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constexpr char PROGMEM FSTRING_REFRESH_CART[] = "Refresh Cart";
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constexpr char PROGMEM FSTRING_MAPPER[] = "Mapper: ";
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constexpr char PROGMEM FSTRING_SIZE[] = "Size: ";
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constexpr char PROGMEM FSTRING_NAME[] = "Name: ";
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constexpr char PROGMEM FSTRING_CHECKSUM[] = "Checksum: ";
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constexpr char PROGMEM FSTRING_ROM_SIZE[] = "ROM Size: ";
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constexpr char PROGMEM FSTRING_REVISION[] = "Revision: ";
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constexpr char PROGMEM FSTRING_SERIAL[] = "Serial: ";
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/*==== /CONSTANTS =================================================*/
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/*==== VARIABLES ==================================================*/
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// Clock speed
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unsigned long clock = CS_16MHZ;
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// Voltage
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VOLTS voltage = VOLTS_SET_5V;
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#if defined(ENABLE_CONFIG)
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FsFile configFile;
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bool useConfig;
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# if defined(ENABLE_GLOBAL_LOG)
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// Logging
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bool loggingEnabled = true;
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# endif /* ENABLE_GLOBAL_LOG */
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#endif /* ENABLE_CONFIG */
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/*==== /VARIABLES =================================================*/
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/*F******************************************************************
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* NAME : void printVersionToSerial()
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*
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* DESCRIPTION : Prints the version & feature string to serial
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*
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*F*/
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#if !defined(ENABLE_SERIAL) && defined(ENABLE_UPDATER)
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void printVersionToSerial() {
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ClockedSerial.print(FS(FSTRING_OSCR));
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ClockedSerial.print(F("::"));
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ClockedSerial.print(FS(FSTRING_VERSION));
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ClockedSerial.print(F("//"));
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#if defined(HW1)
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ClockedSerial.print(F("HW1"));
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#elif defined(HW2)
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ClockedSerial.print(F("HW2"));
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#elif defined(HW3)
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ClockedSerial.print(F("HW3"));
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#elif defined(HW4)
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ClockedSerial.print(F("HW4"));
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#elif defined(HW5)
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ClockedSerial.print(F("HW5"));
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#elif defined(SERIAL_MONITOR)
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ClockedSerial.print(F("Serial"));
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#else
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ClockedSerial.print(F("HW?"));
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#endif
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#if defined (ENABLE_VSELECT)
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ClockedSerial.print(F("|VSELECT"));
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#endif
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#if defined (ENABLE_RTC)
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ClockedSerial.print(F("|RTC"));
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#endif
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#if defined (ENABLE_CLOCKGEN)
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ClockedSerial.print(F("|CLOCKGEN"));
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#endif
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#if defined (OPTION_N64_FASTCRC)
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ClockedSerial.print(F("|FASTCRC"));
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#endif
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#if defined (ENABLE_3V3FIX)
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ClockedSerial.print(F("|3V3FIX"));
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#endif
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ClockedSerial.println(FS(FSTRING_EMPTY));
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}
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#else
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void printVersionToSerial() {}
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#endif
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/*F******************************************************************
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* NAME : void setClockScale( ClockScale )
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*
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* DESCRIPTION : Set ATMEGA2560 clock prescaler
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*
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* INPUTS :
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* PARAMETERS:
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* VOLTS ClockScale Clock scale
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* CLKSCALE ClockScale Clock scale
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*
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* PROCESS :
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* [1] Enable clock prescaler change
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* [2] Apply clock prescaler
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*
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* NOTES :
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* Changing the clock prescaler to a value other than F_CPU (1 by default)
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* can/will result in some clock-based functions not working, including
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* timers and most communication protocols.
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*
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* FURTHER READING :
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* ATmega640/V-1280/V-1281/V-2560/V-2561/V § 10.13.2 [PDF: https://rmy.pw/atmega2560]
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*
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*F*/
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void setClockScale(VOLTS __x)
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{
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uint8_t __tmp = _BV(CLKPCE); /*[1]*/
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__asm__ __volatile__ (
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"in __tmp_reg__,__SREG__" "\n\t"
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"cli" "\n\t"
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"sts %1, %0" "\n\t"
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"sts %1, %2" "\n\t"
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"out __SREG__, __tmp_reg__"
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: /* no outputs */
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: "d" (__tmp),
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"M" (_SFR_MEM_ADDR(CLKPR)),
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"d" (__x)
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: "r0"
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); /*[2]*/
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}
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void setClockScale(CLKSCALE __x)
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{
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clock = (__x == CLKSCALE_16MHZ ? CS_16MHZ : CS_8MHZ);
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uint8_t __tmp = _BV(CLKPCE); /*[1]*/
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__asm__ __volatile__ (
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"in __tmp_reg__,__SREG__" "\n\t"
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"cli" "\n\t"
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"sts %1, %0" "\n\t"
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"sts %1, %2" "\n\t"
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"out __SREG__, __tmp_reg__"
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: /* no outputs */
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: "d" (__tmp),
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"M" (_SFR_MEM_ADDR(CLKPR)),
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"d" (__x)
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: "r0"
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); /*[2]*/
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}
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/*F******************************************************************
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* NAME : VOLTS setVoltage( Voltage )
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*
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* DESCRIPTION : Adjust voltage (and clock prescaler, if enabled)
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*
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* INPUTS :
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* PARAMETERS:
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* VOLTS Voltage Voltage
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*
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* OUTPUTS :
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* RETURN :
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* Type: VOLTS Result:
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* Values: VOLTS_SUCCESS Successfully set the voltage/clock
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* VOLTS_ERROR Something went wrong
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* VOLTS_NOTENABLED VSELECT and 3V3FIX are both disabled
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*
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* PROCESS :
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* [1] Apply voltage
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* [2] Apply clock prescaler
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*
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* NOTES :
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* When changing to 5V the voltage is set first so that the MPU
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* will be stable at 16MHz. When going down to 3.3V the clock
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* is changed to 8MHz first so that the MPU will be stable when
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* the voltage is changed to 3.3V.
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*
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* This works best with VSELECT as the firmware controls the
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* timing of all of this. If you are doing this manually, then
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* you'll need to start the OSCR with 5V set and only switch to
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* 3.3V once on the main menu.
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*
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*F*/
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#if defined(ENABLE_VSELECT) || defined(ENABLE_3V3FIX)
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VOLTS setVoltage(VOLTS newVoltage) {
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switch(newVoltage) {
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/* 5V */
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case VOLTS_SET_5V:
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if (
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#if defined(ENABLE_3V3FIX)
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clock == CS_16MHZ
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#endif
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#if defined(ENABLE_VSELECT) && defined(ENABLE_3V3FIX)
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&&
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#endif
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#if defined(ENABLE_VSELECT)
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VOLTS_SET_5V == voltage
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#endif
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) return VOLTS_SUCCESS; // Just return if already as requested
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// Adjust voltage high if VSELECT is available
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#if defined(ENABLE_VSELECT)
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PORTD &= ~(1 << 7); /*[1]*/
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voltage = VOLTS_SET_5V;
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#endif
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// Adjust clock speed when 3V3FIX is enabled
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#if defined(ENABLE_3V3FIX)
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// Stop serial if running
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#if !defined(ENABLE_SERIAL) && defined(ENABLE_UPDATER)
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ClockedSerial.end();
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#endif
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// Set clock speed
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clock = CS_16MHZ;
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setClockScale(newVoltage); /*[2]*/
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// Restart serial
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#if !defined(ENABLE_SERIAL) && defined(ENABLE_UPDATER)
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ClockedSerial.begin(UPD_BAUD);
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#endif
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#else
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clock = CS_16MHZ;
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#endif
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// Done
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return VOLTS_SUCCESS;
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/* 3.3V */
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case VOLTS_SET_3V3:
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if (
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#if defined(ENABLE_3V3FIX)
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clock == CS_8MHZ
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#endif
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#if defined(ENABLE_VSELECT) && defined(ENABLE_3V3FIX)
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&&
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#endif
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#if defined(ENABLE_VSELECT)
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VOLTS_SET_3V3 == voltage
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#endif
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) return VOLTS_SUCCESS; // Just return if already as requested
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// Adjust clock speed when 3V3FIX is enabled
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#if defined(ENABLE_3V3FIX)
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#if !defined(ENABLE_SERIAL) && defined(ENABLE_UPDATER)
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ClockedSerial.end();
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#endif
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// Set clock speed
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clock = CS_8MHZ;
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setClockScale(newVoltage); /*[2]*/
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#if !defined(ENABLE_SERIAL) && defined(ENABLE_UPDATER)
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ClockedSerial.begin(UPD_BAUD);
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#endif
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#endif
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// Adjust voltage high if VSELECT is available
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#if defined(ENABLE_VSELECT)
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PORTD |= (1 << 7); /*[1]*/
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voltage = VOLTS_SET_3V3;
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#endif
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// Done
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return VOLTS_SUCCESS;
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/* ??? */
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default:
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return VOLTS_ERROR;
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}
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}
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#else
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// The compiler will optimize this out when this condition is met.
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// Yes, even though it has a return value it will only be compiled
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// if something reads that value. Currently nothing does.
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VOLTS setVoltage(VOLTS newVoltage __attribute__((unused))) {
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return VOLTS_NOTENABLED;
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}
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#endif
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#if defined(ENABLE_CONFIG)
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/*F******************************************************************
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* NAME : void configInit()
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*
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* DESCRIPTION : Setup the config file.
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*
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*F*/
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void configInit() {
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useConfig = configFile.open(CONFIG_FILE, O_READ);
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}
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/*F******************************************************************
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* NAME : uint8_t configFindKey( Key, Value )
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*
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* DESCRIPTION : Search for a key=value pair.
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*
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* INPUTS :
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* PARAMETERS:
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* __FlashStringHelper Key The key to get the value for.
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* char* value Variable to store the value in.
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*
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* OUTPUTS :
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* RETURN :
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* Type: uint8_t Length of the value.
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*
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* PROCESS :
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* [1] Get key length and convert to char array/string.
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* [2] Parse file line by line.
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* [3] Check if key in file matches.
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* [4] Copy string after equals character.
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* [5] Add null terminator.
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*
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* NOTES :
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* You aren't meant to use this function directly. Check the
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* functions configGetStr() and configGetLong().
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*
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*F*/
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uint8_t configFindKey(const __FlashStringHelper* searchKey, char* value) {
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if (!useConfig) return 0;
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char key[CONFIG_KEY_MAX + 1];
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char buffer[CONFIG_KEY_MAX + CONFIG_VALUE_MAX + 4];
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int keyLen = 0;
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int valueLen = 0;
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keyLen = strlcpy_P(key, reinterpret_cast<const char *>(searchKey), CONFIG_KEY_MAX); /*[1]*/
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configFile.rewind();
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while (configFile.available()) { /*[2]*/
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int bufferLen = configFile.readBytesUntil('\n', buffer, CONFIG_KEY_MAX + CONFIG_VALUE_MAX + 3);
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if (buffer[bufferLen - 1] == '\r')
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bufferLen--;
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if (bufferLen > (keyLen + 1)) {
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if (memcmp(buffer, key, keyLen) == 0) { /*[3]*/
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if (buffer[keyLen] == '=') { /*[4]*/
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valueLen = bufferLen - keyLen - 1;
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memcpy(&value[0], &buffer[keyLen + 1], valueLen);
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value[valueLen] = '\0'; /*[5]*/
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break;
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}
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}
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}
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}
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return valueLen;
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}
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/*F******************************************************************
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* NAME : String configGetStr( Key )
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*
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* DESCRIPTION : Return the value of a key as a string.
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*
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* INPUTS :
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* PARAMETERS:
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* __FlashStringHelper Key The key to get the value for.
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*
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* OUTPUTS :
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* RETURN :
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* Type: String The value of the key or an empty string.
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*
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* PROCESS :
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* [1] Find the key via configFindKey().
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* [2] Return empty if nothing was found.
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* [3] Convert to String type.
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*
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* NOTES :
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* You can use this to get strings stored in the config file.
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* Take care when allocating memory for strings. You should
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* probably use malloc for it if it's a global variable. If
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* you do, make sure to free() it after it's not needed.
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*
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*F*/
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String configGetStr(const __FlashStringHelper* key) {
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if (!useConfig) return {};
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char value[CONFIG_VALUE_MAX + 1];
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uint8_t valueLen = configFindKey(key, value); /*[1]*/
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if (valueLen < 1) return {}; /*[2]*/
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String stringVal(value); /*[3]*/
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return stringVal;
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}
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/*F******************************************************************
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* NAME : long configGetLong( Key, OnFailure )
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*
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* DESCRIPTION : Return the value of a key as an int/long.
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*
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* INPUTS :
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* PARAMETERS:
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* __FlashStringHelper Key The key to get the value for.
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* int onFail Value to return on failure. (def=0)
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*
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* OUTPUTS :
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* RETURN :
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* Type: int The value of the key or onFail.
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*
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* PROCESS :
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* [1] Find the key via configFindKey().
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* [2] Return onFail if nothing was found.
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* [3] Convert to long int type and return.
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*
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* NOTES :
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* You can specify hex, i.e. 0xFF for 255, if you want to.
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*
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*F*/
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long configGetLong(const __FlashStringHelper* key, int onFail) {
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if (!useConfig) return onFail;
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char value[CONFIG_VALUE_MAX + 1];
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uint8_t valueLen = configFindKey(key, value); /*[1]*/
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if (valueLen < 1) return onFail; /*[2]*/
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return strtol(value, NULL, 0); /*[3]*/
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}
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#endif /* ENABLE_CONFIG */
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