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Add support for Arduino Nano Every / ATtmega4809 #93

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3cc3bc2
Add support for Arduino Nano Every / ATtmega4809
moonzephyr386 Sep 11, 2025
018acd7
Fix innacurate board detection loop
moonzephyr386 Sep 11, 2025
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118 changes: 116 additions & 2 deletions PSNee_V8.6/PSNee_V8.6/MUC.h
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Original file line number Diff line number Diff line change
Expand Up @@ -355,7 +355,123 @@
#if !defined(SCPH_xxx1) && !defined(SCPH_xxx2) && !defined(SCPH_103) && !defined(SCPH_xxxx)
#error "ATtiny85_45_25 Not compatible with BIOS patch"
#endif
#endif

#ifdef ATmega4809

// Define the clock speed for the microcontroller
#define F_CPU 16000000L

// Set the main clock to 16 MHz by clearing the clock divider
#define SET_CLOCK _PROTECTED_WRITE(CLKCTRL.MCLKCTRLB, 0x00);

// Configure Timer for 100 kHz periodic tick using TCB0
#define TIMER_TCNT_CLEAR TCB0.CNT = 0x00; // TCB0.CNT - Timer/Counter B Register, clears the timer count

// Set TCB0.CCMP to achieve a 100KHz clock frequency
#define SET_OCROA_DIV TCB0.CCMP = 159; // TCB0.CCMP – Compare/Capture Register, 100KHz clock generation

// Configure Timer/Counter B0 for Periodic Interrupt mode and enable the clock source
#define SET_TIMER_TCCROA TCB0.CTRLB = TCB_CNTMODE_INT_gc; // TCB0.CTRLB – Control Register B, enable Periodic Interrupt mode
#define SET_TIMER_TCCROB TCB0.CTRLA = TCB_CLKSEL_CLKDIV1_gc; // TCB0.CTRLA – Control Register A, set clock select to CLK_PER (No Prescaling)
// Mode: Periodic Interrupt

// Interrupt vector for timer compare match event
#define CTC_TIMER_VECTOR TCB0_INT_vect // Interrupt vector for TCB0 compare match event

#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/sfr_defs.h>
#include <util/delay.h>

// Global interrupt control settings
#define GLOBAL_INTERRUPT_ENABLE sei()
#define GLOBAL_INTERRUPT_DISABLE cli()

// Main pin configuration for input and output

// Define the main pins as inputs
#define PIN_DATA_INPUT PORTE.DIRCLR = PIN3_bm // D8 -> PE3
#define PIN_WFCK_INPUT PORTB.DIRCLR = PIN0_bm // D9 -> PB0
#define PIN_SQCK_INPUT PORTF.DIRCLR = PIN4_bm // D6 -> PF4
#define PIN_SUBQ_INPUT PORTA.DIRCLR = PIN1_bm // D7 -> PA1

// Define the main pins as outputs
#define PIN_DATA_OUTPUT PORTE.DIRSET = PIN3_bm
#define PIN_WFCK_OUTPUT PORTB.DIRSET = PIN0_bm

// Define pull-ups and set high at the main pin
#define PIN_DATA_SET PORTE.OUTSET = PIN3_bm

// Clear the main pins (set low)
#define PIN_DATA_CLEAR PORTE.OUTCLR = PIN3_bm
#define PIN_WFCK_CLEAR PORTB.OUTCLR = PIN0_bm

// Read the state of the main input pins
#define PIN_SQCK_READ (PORTF.IN & PIN4_bm)
#define PIN_SUBQ_READ (PORTA.IN & PIN1_bm)
#define PIN_WFCK_READ (PORTB.IN & PIN0_bm)


// LED pin handling (for indication)
#define LED_RUN
#define PIN_LED_OUTPUT PORTE.DIRSET = PIN2_bm // D13 -> PE2
#define PIN_LED_ON PORTE.OUTSET = PIN2_bm
#define PIN_LED_OFF PORTE.OUTCLR = PIN2_bm

// Handling the BIOS patch

// Enable/Disable timer interrupts for TCB0
// This macro now also enables the timer itself.
#define TIMER_INTERRUPT_ENABLE TCB0.INTCTRL = TCB_CAPT_bm; TCB0.CTRLA |= TCB_ENABLE_bm
#define TIMER_INTERRUPT_DISABLE TCB0.CTRLA &= ~TCB_ENABLE_bm; TCB0.INTCTRL = 0

// Clear the timer interrupt flag
#define TIMER_TIFR_CLEAR TCB0.INTFLAGS = TCB_CAPT_bm // Clear the TCB0 Compare Match interrupt flag

// Define input pins for the BIOS patch
#define PIN_AX_INPUT PORTA.DIRCLR = PIN0_bm // D2 -> PA0
#define PIN_AY_INPUT PORTF.DIRCLR = PIN5_bm // D3 -> PF5
#define PIN_DX_INPUT PORTC.DIRCLR = PIN6_bm // D4 -> PC6

// Define output pins for the BIOS patch
#define PIN_DX_OUTPUT PORTC.DIRSET = PIN6_bm

// Set pull-ups high on output pins
#define PIN_DX_SET PORTC.OUTSET = PIN6_bm

// Set pull-ups low on output pins
#define PIN_DX_CLEAR PORTC.OUTCLR = PIN6_bm

// Read the input pins for the BIOS patch
#define PIN_AX_READ (PORTA.IN & PIN0_bm)
#define PIN_AY_READ (PORTF.IN & PIN5_bm)

// External interrupt configuration for BIOS patch
#define PIN_AX_INTERRUPT_ENABLE PORTA.PIN0CTRL |= PORT_ISC_BOTHEDGES_gc
#define PIN_AY_INTERRUPT_ENABLE PORTF.PIN5CTRL |= PORT_ISC_BOTHEDGES_gc

#define PIN_AX_INTERRUPT_DISABLE PORTA.PIN0CTRL &= ~PORT_ISC_gm
#define PIN_AY_INTERRUPT_DISABLE PORTF.PIN5CTRL &= ~PORT_ISC_gm

#define PIN_AX_INTERRUPT_RISING PORTA.PIN0CTRL = (PORTA.PIN0CTRL & ~PORT_ISC_gm) | PORT_ISC_RISING_gc
#define PIN_AY_INTERRUPT_RISING PORTF.PIN5CTRL = (PORTF.PIN5CTRL & ~PORT_ISC_gm) | PORT_ISC_RISING_gc

#define PIN_AX_INTERRUPT_FALLING PORTA.PIN0CTRL = (PORTA.PIN0CTRL & ~PORT_ISC_gm) | PORT_ISC_FALLING_gc
#define PIN_AY_INTERRUPT_FALLING PORTF.PIN5CTRL = (PORTF.PIN5CTRL & ~PORT_ISC_gm) | PORT_ISC_FALLING_gc

// Interrupt vectors for external interrupts
#define PIN_AX_INTERRUPT_VECTOR PORTA_PORT_vect
#define PIN_AY_INTERRUPT_VECTOR PORTF_PORT_vect

// Handle switch input for BIOS patch
#define PIN_SWITCH_INPUT PORTB.DIRCLR = PIN2_bm // D5 -> PB2
#define PIN_SWITCH_SET PORTB.OUTSET = PIN2_bm
#define PIN_SWITCH_READ (PORTB.IN & PIN2_bm)

#endif

// *****************************************************************************************************************
// WARNING:
Expand Down Expand Up @@ -749,5 +865,3 @@
#define PIN_SWICHE_READ (GPIOA->IDR & (GPIO_IDR_IDR_5))

#endif

#endif
34 changes: 29 additions & 5 deletions PSNee_V8.6/PSNee_V8.6/PSNee_V8.6.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,8 @@
//#define ATmega328_168
//#define ATmega32U4_16U4
//#define ATtiny85_45_25

//#define ATmega4809

/*
Fuses:
ATmega - H: DF, L: EE, E: FD.
Expand All @@ -57,6 +58,19 @@
Pin6-SUBQ (MISO)
Pin7_DATA (SCK)
Pin8-VCC

Pinout Arduino Nano Every:
VCC-3.5v, PinGND-GND,
D2(PA0)-BIOS AX (Only for Bios patch)
D3(PF5)-BIOS AY (Only for BIOS ver. 1.0j-1.1j)
D4(PC6)-BIOS DX (Only for Bios patch)
D5(PB2)-Switch* (Optional for Bios patch)
D6(PF4)-SQCK
D7(PA1)-SUBQ
D8(PE3)-DATA
D9(PB0)-GATE_WFCK
D13(PE2)-LED (Built-in LED)
RST-RESET* (Only for JAP_FAT)
*/


Expand Down Expand Up @@ -119,6 +133,10 @@ ISR(CTC_TIMER_VECTOR) {
millisec++;
count_isr = 0;
}
#if defined(ATmega4809)
// Clear TCB0 capture/interrupt flag to allow next interrupt
TCB0.INTFLAGS = TCB_CAPT_bm;
#endif
}

// *****************************************************************************************
Expand All @@ -144,7 +162,7 @@ ISR(CTC_TIMER_VECTOR) {
//
// *****************************************************************************************
void Timer_Start() {
#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25)
#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25) || defined(ATmega4809)
TIMER_TCNT_CLEAR;
TIMER_INTERRUPT_ENABLE;
#if defined(BIOS_PATCH)
Expand All @@ -168,7 +186,7 @@ void Timer_Start() {
// *****************************************************************************************
void Timer_Stop() {

#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25)
#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25) || defined(ATmega4809)
TIMER_INTERRUPT_DISABLE; // Disable timer interrupts to stop counting
TIMER_TCNT_CLEAR; // Reset the timer counter to ensure proper timing when restarted
#endif
Expand Down Expand Up @@ -286,7 +304,11 @@ void inject_SCEX(const char region) {
}

void Init() {
#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25)
#if defined(ATmega4809)
SET_CLOCK;
#endif

#if defined(ATmega328_168) || defined(ATmega32U4_16U4) || defined(ATtiny85_45_25) || defined(ATmega4809)
TIMER_TCNT_CLEAR;
SET_OCROA_DIV;
SET_TIMER_TCCROA;
Expand Down Expand Up @@ -347,9 +369,11 @@ int main() {
// WFCK: __-_-_-_-_-_-_-_-_-_-_-_- // this is a PU-22 or newer board!
// typical readouts PU-22: highs: 2449 lows: 2377
//************************************************************************
uint32_t last_read;
do {
if (PIN_WFCK_READ == 0) lows++; // good for ~5000 reads in 1s
_delay_us(200);
last_read = microsec;
while (microsec - last_read < 200) { }
}
while (millisec < 1000); // sample 1s

Expand Down