#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "pins.h"
#include "mytypes.h"
#include "main.h"
#include "atx.h"
#include "rs232.h"
#include "zx.h"
//if want Log than comment next string
#undef LOGENABLE
volatile UWORD atx_counter;
void wait_for_atx_power(void)
{
UBYTE j = MCUCSR;
//clear status register
MCUCSR = 0;
#ifdef LOGENABLE
char log_ps2keyboard_parse[] = "MC..\r\n";
log_ps2keyboard_parse[2] = ((j >> 4) <= 9 )?'0'+(j >> 4):'A'+(j >> 4)-10;
log_ps2keyboard_parse[3] = ((j & 0x0F) <= 9 )?'0'+(j & 0x0F):'A'+(j & 0x0F)-10;
to_log(log_ps2keyboard_parse);
#endif
//check power
if ( (nCONFIG_PIN & (1<<nCONFIG)) == 0 )
{
// only after poweron reset we should wait for soft reset button before powering on
if( !(j & ((1<<JTRF)|(1<<WDRF)|(1<<BORF)|(1<<EXTRF))) || (j & (1<<PORF)) )
{
// have at least 2 sec pause before turning on, as this hopefully gives enough time
// for FPGA voltages to drop and it will powerup cleanly without compromising the firmware
UBYTE soft_rst_pressed = 0;
UBYTE i = PRE_PWRON_WAIT;
do
{
// blink power LED
if( i&7 )
LED_PORT |= (1<<LED);
else
LED_PORT &= ~(1<<LED);
_delay_ms(20);
// if soft reset was pressed during wait, remember it and go poweron immediately after the wait ends
soft_rst_pressed |= !(SOFTRES_PIN & (1<<SOFTRES));
} while(--i);
// wait further for soft reset press
if( !soft_rst_pressed ) while( SOFTRES_PIN&(1<<SOFTRES) );
}
//switch on ATX power (PF3 pin in PORTF)
ATXPWRON_PORT |= (1<<ATXPWRON);
//1 sec delay
UBYTE i=50;
do {_delay_ms(20);} while(--i);
}
//clear counter
atx_counter = 0;
}
void atx_power_task(void)
{
UBYTE i;
static UWORD last_count = 0;
if ( atx_counter > PWROFF_KEY_TIME )
{
//here if either SOFTRES_PIN or F12 held for more than ~5 seconds
// no more need in executing mainloop and servicing interrupts
cli();
UBYTE was_soft_rst = !(SOFTRES_PIN & (1<<SOFTRES));
// switch off ATX power
ATXPWRON_PORT &= ~(1<<ATXPWRON);
// wait for ATX power to actually drop -- for no more than 2 second.
// if the wait would be infinite, hang will result on non-ATX power supplies
i=PWROFF_WAIT;
do
{
if( !(nCONFIG_PIN & (1<<nCONFIG)) ) break;
_delay_ms(20);
} while( --i );
// if it was soft reset switch initiated -- wait for it to release
if( was_soft_rst )
{
while( !(SOFTRES_PIN & (1<<SOFTRES)) );
i=SOFT_RST_DEBOUNCE; // and then debounce it
do _delay_ms(20); while(--i);
}
//power led off (timer output disconnect from led pin)
TCCR2 &= ~((1<<COM20)|(1<<COM21));
// signal HARD_RESET to exit out of mainloop in main.c -- and eventually return to wait_for_atx_power()
flags_register |= FLAG_HARD_RESET;
}
else if ( ( last_count > 0 ) && ( atx_counter == 0 ) )
{
//soft reset (reset Z80 only) -- F12 or softreset pressed for less than 1700 ticks
zx_spi_send(SPI_RST_REG, 0, 0x7F);
}
last_count = atx_counter;
}