Sorry no, I don't plan on releasing the source because source code documentation isn't complete AND it's mixed in english/german Tidying up the documentation would cost time & effort...
No way, this is amazing! Our thread was only for N64, and you went ahead and did all of them. Very impressive.
I know you are not planning on cleaning up and releasing the source code - but now that you've solved it, would you do me a favour and please answer a question that was bugging me the WHOLE TIME I was working on the N64?
Here is the question: How did you communicate between the receiver and the N64 itself? If I understand correctly, when the N64 turns on, it sends a bunch of 0x00 "are you there/what do you have plugged in" commands on the data line, and then 0x01 "what buttons are being pressed"? What did you do with the receiver's micro in order to fake a response and get the N64 to think that there was a genuine controller plugged in?
Thanks again, beautiful work! I hope you have time to answer, that question has been bugging me for months and was the reason I gave up on it ...
No problem, here's the code for speaking to the N64 console: (but not including the wireless and button conversion stuff)
Spoiler:
Code:
.nolist .include "m8def.inc" .list
.cseg .org 0000 rjmp init ;reset rjmp isr0 ;int0 reti ;int1 reti ;timer2 comp reti ;timer2 overflow reti ;timer1 capture reti ;timer1 compare A reti; timer1 compare N reti ;timer1 overflow reti ;timer0 overflow reti ;SPI serial transfer complete reti ;USART rx complete reti ;USART DR empty reti ;USART tx complete reti ;ADC complete reti ;eeprom ready reti ;analog comparator reti ;two wire interface reti ;store program memory ready
init: ;INIT STACK ldi r16, HIGH(RAMEND) out SPH, r16 ldi r16, LOW(RAMEND) out SPL, r16
;VARIABLES FOR RECEIVED DATA .equ COMMAND = SRAM_START ;VARIABLES TO SEND TO N64 .equ N64_BUTTONS1 = SRAM_START+1 .equ N64_BUTTONS2 = SRAM_START+2 .equ N64_X = SRAM_START+3 .equ N64_Y = SRAM_START+4
;CONFIG INT0 = low level ldi r16, 0b0000_0000 out MCUCR, r16 ldi r16, 0b0100_0000 out GICR, r16 sei
;MAIN LOOP: (empty) main: nop ;r18 - r20 are reserved for isr0, don't use them rjmp main
isr0_end: out sreg, r20 ;write back status register reti ;-------------------------------------------------------- ;---------ISR0 END---------------------------------------
;-------------SEND A BYTE TO N64------------------------------ ;------------------------------------------------------------- send_a_byte: ldi r19, 8 next_bit: sbi ddrd, 2 ;data is always low at the beginning of the bit rcall delay7 nop nop nop nop nop sbrs r18, 7 ;skip if you want to send a "1" rjmp little_detour ;branch to little_detour for a "0" cbi ddrd, 2 ;1 us elapsed, set data high now if you want to send a "1" nop ;compensation nop on_with_the_show: rcall delay14 rcall delay14 nop cbi ddrd, 2 ;3 us elapsed now, data gets high now for a "0", and stays high for a "1" of course lsl r18 ;leftshift databyte dec r19 ;decrease count breq byte_end ;if count=0, byte is complete nop rcall delay7 nop rjmp next_bit little_detour: rjmp on_with_the_show byte_end: ret
;--------------MISC DELAY ROUTINES----------------- ;-------------------------------------------------- delay7: ret delay14: rcall delay7 ret delay16: rcall delay7 nop nop ret delay62: rcall delay16 rcall delay16 rcall delay16 rcall delay7 ret
If the N64 console pulls the data line low it will trigger the interrupt service routine 0 and the MCU will record the command. After the command has been sent, the MCU checks the command and it will start to send the appropriate answer (status or buttons data).
In the beginning I thought the 0xFF command just resets the controller, but evilteddy taught me that this command should also be answered with the status bytes. So thanks again for this tip In the end I don't think my code differs very much from evilteddy's.
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