mirror of
https://github.com/halleysfifthinc/Toyota-AVC-LAN
synced 2025-06-21 06:36:09 +00:00
145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
/*--------------------------------------------------------------------------------------------------
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Name : ToyotaAuxEnabler.c
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Description : This program enables the AUX audio input on old Toyota radios with CD. Pressing
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CD Eject button while no CD is loaded will toggle the AUX input.
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MCU : ATmega328P @ 16 MHz.
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Author : 2007-01-27 - Louis Frigon
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Copyright : (c) 2007 SigmaObjects
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History : 2007-01-27 - v0.1 Prototyping draft inspired from Marcin Slonicki's code.
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2007-02-24 - v1.0 Production release.
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--------------------------------------------------------------------------------------------------*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/wdt.h>
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#include <stdio.h>
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#include "GlobalDef.h"
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#include "USART.h"
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#include "AVCLanDriver.h"
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#define FIRMWARE_VERSION "v1.0"
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#define FIRMWARE_DATE __DATE__
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/*--------------------------------------------------------------------------------------------------
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Prototypes
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--------------------------------------------------------------------------------------------------*/
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void InitMCU ( void );
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/*--------------------------------------------------------------------------------------------------
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Global Variables
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--------------------------------------------------------------------------------------------------*/
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volatile bool SecondsTick = FALSE;
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char UsartMsgBuffer[ USART_BUFFER_SIZE ];
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/*--------------------------------------------------------------------------------------------------
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Name : InitMCU
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Description : Performs MCU initialization.
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Argument(s) : None.
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Return value : None.
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--------------------------------------------------------------------------------------------------*/
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void InitMCU ( void )
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{
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// Init LED port pin
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LED_DDR |= LEDOUT;
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LedOff();
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// OLD: TCCR0A = _BV(CS01);
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// Correction: TCCR0B has the CS0n bits, not TCCR0A, prescaler should be at 8 or less to have 1 or more counts/us
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// Timer 0 prescaler = 8 ( 2 count / us )
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TCCR0B = _BV(CS01);
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InitUSART();
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// Preset AVC bus driver output pins but leave pins tri-stated until we need to use them.
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PORTD |= _BV(PD3); // PD3 (+) high.
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PORTD &= ~_BV(PD2); // PD2 (-) low.
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// Enable watchdog @ ~2 sec.
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// Likely this too, after research probably not, but maybe
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wdt_enable( WDTO_2S );
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}
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/*--------------------------------------------------------------------------------------------------
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Name : LedOn
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Description : Turn LED on (active low signal).
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Argument(s) : None.
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Return value : None.
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--------------------------------------------------------------------------------------------------*/
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inline void LedOn ( void )
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{
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LED_PORT &= ~LEDOUT;
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}
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/*--------------------------------------------------------------------------------------------------
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Name : LedOff
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Description : Turn LED off (active low signal).
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Argument(s) : None.
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Return value : None.
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--------------------------------------------------------------------------------------------------*/
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inline void LedOff ( void )
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{
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LED_PORT |= LEDOUT;
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}
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/*--------------------------------------------------------------------------------------------------
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Name : main
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Description : Program's main function.
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Argument(s) : None.
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Return value : None.
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--------------------------------------------------------------------------------------------------*/
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int main ( void )
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{
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InitMCU();
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UsartPutCStr( PSTR("\r\n\t\t Toyota AVC-Lan AUX Enabler\r\n") );
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UsartPutCStr( PSTR("\t\tCopyright (C) 2007, SigmaObjects Inc.\r\n") );
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sprintf( UsartMsgBuffer, "\t\t Firmware %s, %s\r\n\r\n", FIRMWARE_VERSION, FIRMWARE_DATE );
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UsartPutStr( UsartMsgBuffer );
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while ( 1 )
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{
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// Reset watchdog.
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wdt_reset();
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AvcActionID actionID = AvcReadMessage();
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if ( actionID != ACT_NONE )
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{
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AvcProcessActionID( actionID );
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}
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}
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}
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/*--------------------------------------------------------------------------------------------------
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End of file.
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--------------------------------------------------------------------------------------------------*/
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