mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-30 00:14:15 +01:00
266 lines
7.9 KiB
C++
266 lines
7.9 KiB
C++
/********************************************************************
|
|
* Open Source Cartridge Reader */
|
|
/*H******************************************************************
|
|
* FILENAME : OSCR.cpp
|
|
*
|
|
* DESCRIPTION :
|
|
* Contains various enums, variables, etc, for the main program.
|
|
*
|
|
* PUBLIC FUNCTIONS :
|
|
* void setClockScale( VOLTS )
|
|
*
|
|
* NOTES :
|
|
* This file is a WIP, I've been moving things into it on my local working
|
|
* copy, but they are not ready yet. Rather than put this in the main file
|
|
* only to move them back again, I decided to commit it early. If you need
|
|
* to add new globals, enums, defines, etc, please use this file!
|
|
*
|
|
* LICENSE :
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
* CHANGES :
|
|
*
|
|
* REF NO VERSION DATE WHO DETAIL
|
|
* 12.5 2023-03-29 Ancyker Initial version
|
|
*
|
|
*H*/
|
|
|
|
#include "OSCR.h"
|
|
|
|
/*==== VARIABLES ==================================================*/
|
|
|
|
// Firmware Version
|
|
char ver[5] = "12.9";
|
|
|
|
// Clock speed
|
|
unsigned long clock = CS_16MHZ;
|
|
|
|
// Voltage
|
|
VOLTS voltage = VOLTS_SET_5V;
|
|
|
|
/*==== /VARIABLES =================================================*/
|
|
|
|
/*F******************************************************************
|
|
* NAME : void printVersionToSerial()
|
|
*
|
|
* DESCRIPTION : Prints the version & feature string to serial
|
|
*
|
|
*F*/
|
|
#if !defined(enable_serial) && defined(ENABLE_UPDATER)
|
|
void printVersionToSerial() {
|
|
ClockedSerial.print(F("OSCR"));
|
|
ClockedSerial.print(F("::"));
|
|
ClockedSerial.print(ver);
|
|
ClockedSerial.print(F("//"));
|
|
#if defined(HW1)
|
|
ClockedSerial.print(F("HW1"));
|
|
#elif defined(HW2)
|
|
ClockedSerial.print(F("HW2"));
|
|
#elif defined(HW3)
|
|
ClockedSerial.print(F("HW3"));
|
|
#elif defined(HW4)
|
|
ClockedSerial.print(F("HW4"));
|
|
#elif defined(HW5)
|
|
ClockedSerial.print(F("HW5"));
|
|
#elif defined(SERIAL_MONITOR)
|
|
ClockedSerial.print(F("Serial"));
|
|
#else
|
|
ClockedSerial.print(F("HW?"));
|
|
#endif
|
|
#if defined (ENABLE_VSELECT)
|
|
ClockedSerial.print(F("|VSELECT"));
|
|
#endif
|
|
#if defined (RTC_installed)
|
|
ClockedSerial.print(F("|RTC"));
|
|
#endif
|
|
#if defined (clockgen_installed)
|
|
ClockedSerial.print(F("|CLOCKGEN"));
|
|
#endif
|
|
#if defined (fastcrc)
|
|
ClockedSerial.print(F("|FASTCRC"));
|
|
#endif
|
|
#if defined (ENABLE_3V3FIX)
|
|
ClockedSerial.print(F("|3V3FIX"));
|
|
#endif
|
|
|
|
ClockedSerial.println(F(""));
|
|
}
|
|
#else
|
|
void printVersionToSerial() {}
|
|
#endif
|
|
|
|
/*F******************************************************************
|
|
* NAME : void setClockScale( ClockScale )
|
|
*
|
|
* DESCRIPTION : Set ATMEGA2560 clock prescaler
|
|
*
|
|
* INPUTS :
|
|
* PARAMETERS:
|
|
* VOLTS ClockScale Clock scale
|
|
*
|
|
* PROCESS :
|
|
* [1] Enable clock prescaler change
|
|
* [2] Apply clock prescaler
|
|
*
|
|
* NOTES :
|
|
* Changing the clock prescaler to a value other than F_CPU (1 by default)
|
|
* can/will result in some clock-based functions not working, including
|
|
* timers and most communication protocols.
|
|
*
|
|
* FURTHER READING :
|
|
* ATmega640/V-1280/V-1281/V-2560/V-2561/V § 10.13.2 [PDF: https://rmy.pw/atmega2560]
|
|
*
|
|
*F*/
|
|
void setClockScale(VOLTS __x)
|
|
{
|
|
uint8_t __tmp = _BV(CLKPCE); /*[1]*/
|
|
__asm__ __volatile__ (
|
|
"in __tmp_reg__,__SREG__" "\n\t"
|
|
"cli" "\n\t"
|
|
"sts %1, %0" "\n\t"
|
|
"sts %1, %2" "\n\t"
|
|
"out __SREG__, __tmp_reg__"
|
|
: /* no outputs */
|
|
: "d" (__tmp),
|
|
"M" (_SFR_MEM_ADDR(CLKPR)),
|
|
"d" (__x)
|
|
: "r0"
|
|
); /*[2]*/
|
|
}
|
|
|
|
/*F******************************************************************
|
|
* NAME : VOLTS setVoltage( Voltage )
|
|
*
|
|
* DESCRIPTION : Adjust voltage (and clock prescaler, if enabled)
|
|
*
|
|
* INPUTS :
|
|
* PARAMETERS:
|
|
* VOLTS Voltage Voltage
|
|
*
|
|
* OUTPUTS :
|
|
* RETURN :
|
|
* Type: VOLTS Result:
|
|
* Values: VOLTS_SUCCESS Successfully set the voltage/clock
|
|
* VOLTS_ERROR Something went wrong
|
|
* VOLTS_NOTENABLED VSELECT and 3V3FIX are both disabled
|
|
*
|
|
* PROCESS :
|
|
* [1] Apply voltage
|
|
* [2] Apply clock prescaler
|
|
*
|
|
* NOTES :
|
|
* When changing to 5V the voltage is set first so that the MPU
|
|
* will be stable at 16MHz. When going down to 3.3V the clock
|
|
* is changed to 8MHz first so that the MPU will be stable when
|
|
* the voltage is changed to 3.3V.
|
|
*
|
|
* This works best with VSELECT as the firmware controls the
|
|
* timing of all of this. If you are doing this manually, then
|
|
* you'll need to start the OSCR with 5V set and only switch to
|
|
* 3.3V once on the main menu.
|
|
*
|
|
*F*/
|
|
#if defined(ENABLE_VSELECT) || defined(ENABLE_3V3FIX)
|
|
VOLTS setVoltage(VOLTS newVoltage) {
|
|
switch(newVoltage) {
|
|
/* 5V */
|
|
case VOLTS_SET_5V:
|
|
if (
|
|
#if defined(ENABLE_3V3FIX)
|
|
clock == CS_16MHZ
|
|
#endif
|
|
#if defined(ENABLE_VSELECT) && defined(ENABLE_3V3FIX)
|
|
&&
|
|
#endif
|
|
#if defined(ENABLE_VSELECT)
|
|
VOLTS_SET_5V == voltage
|
|
#endif
|
|
) return VOLTS_SUCCESS; // Just return if already as requested
|
|
|
|
// Adjust voltage high if VSELECT is available
|
|
#if defined(ENABLE_VSELECT)
|
|
PORTD &= ~(1 << 7); /*[1]*/
|
|
voltage = VOLTS_SET_5V;
|
|
#endif
|
|
|
|
// Adjust clock speed when 3V3FIX is enabled
|
|
#if defined(ENABLE_3V3FIX)
|
|
// Stop serial if running
|
|
#if !defined(enable_serial) && defined(ENABLE_UPDATER)
|
|
ClockedSerial.end();
|
|
#endif
|
|
// Set clock speed
|
|
clock = CS_16MHZ;
|
|
setClockScale(newVoltage); /*[2]*/
|
|
// Restart serial
|
|
#if !defined(enable_serial) && defined(ENABLE_UPDATER)
|
|
ClockedSerial.begin(UPD_BAUD);
|
|
#endif
|
|
#else
|
|
clock = CS_16MHZ;
|
|
#endif
|
|
|
|
// Done
|
|
return VOLTS_SUCCESS;
|
|
|
|
/* 3.3V */
|
|
case VOLTS_SET_3V3:
|
|
if (
|
|
#if defined(ENABLE_3V3FIX)
|
|
clock == CS_8MHZ
|
|
#endif
|
|
#if defined(ENABLE_VSELECT) && defined(ENABLE_3V3FIX)
|
|
&&
|
|
#endif
|
|
#if defined(ENABLE_VSELECT)
|
|
VOLTS_SET_3V3 == voltage
|
|
#endif
|
|
) return VOLTS_SUCCESS; // Just return if already as requested
|
|
|
|
// Adjust clock speed when 3V3FIX is enabled
|
|
#if defined(ENABLE_3V3FIX)
|
|
#if !defined(enable_serial) && defined(ENABLE_UPDATER)
|
|
ClockedSerial.end();
|
|
#endif
|
|
// Set clock speed
|
|
clock = CS_8MHZ;
|
|
setClockScale(newVoltage); /*[2]*/
|
|
#if !defined(enable_serial) && defined(ENABLE_UPDATER)
|
|
ClockedSerial.begin(UPD_BAUD);
|
|
#endif
|
|
#endif
|
|
|
|
// Adjust voltage high if VSELECT is available
|
|
#if defined(ENABLE_VSELECT)
|
|
PORTD |= (1 << 7); /*[1]*/
|
|
voltage = VOLTS_SET_3V3;
|
|
#endif
|
|
|
|
// Done
|
|
return VOLTS_SUCCESS;
|
|
|
|
/* ??? */
|
|
default:
|
|
return VOLTS_ERROR;
|
|
}
|
|
}
|
|
#else
|
|
// The compiler will optimize this out when this condition is met.
|
|
// Yes, even though it has a return value it will only be compiled
|
|
// if something reads that value. Currently nothing does.
|
|
VOLTS setVoltage(VOLTS newVoltage __attribute__((unused))) {
|
|
return VOLTS_NOTENABLED;
|
|
}
|
|
#endif
|