Add commands: loadf, go, reset restart

[z180-stamp.git] / avr / main.c

/*
 */


#include "common.h"

#include <util/delay.h>
//#include <avr/power.h>
//#include <avr/pgmspace.h>
#include <avr/interrupt.h>
//#include <util/atomic.h>
//#include <avr/sleep.h>
//#include <string.h>

#include <util/delay.h>

#include <stdlib.h>
#include <stdio.h>


#include "config.h"
#include "debug.h"
#include "z80-if.h"
#include "con-utils.h"
#include "serial.h"
#include "timer.h"
#include "cli.h"
#include "env.h"

/*--------------------------------------------------------------------------*/

void setup_avr(void)
{
	/* WD */

	/* CPU */

	/* Disable JTAG Interface regardless of the JTAGEN fuse setting. */
	MCUCR = _BV(JTD);
	MCUCR = _BV(JTD);

	/* disable unused periphels */
	PRR0 = _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRADC);
	PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) | 
		_BV(PRUSART3) | _BV(PRUSART2) | _BV(PRUSART1);

	/* disable analog comparator */
	ACSR = _BV(ACD);
	/* Ports */

	/* Clock */
	CLKPR = _BV(CLKPCE);
	CLKPR = 0;

	/* Timer */

	OCR1A = F_CPU / 8 / 1000 - 1; // Timer1: 1000Hz interval (OC1A)
	TCCR1B = 0b00001010;
	TIMSK1 = _BV(OCIE1A); // Enable TC1.oca interrupt
}



/*******************************************************************************/
/*******************************************************************************/

#define udelay(n)  _delay_us(n)


/* Stored value of bootdelay, used by autoboot_command() */
static int  stored_bootdelay;


/***************************************************************************
 * Watch for 'delay' seconds for autoboot stop.
 * returns: 0 - no key, allow autoboot 
 *          1 - got key, abort
 */

static int abortboot(int  bootdelay)
{
	int abort = 0;
	uint32_t ts;

	if (bootdelay >= 0)
		printf_P(PSTR("Hit any key to stop autoboot: %2d "), bootdelay);

#if defined CONFIG_ZERO_BOOTDELAY_CHECK
	/*
	 * Check if key already pressed
	 * Don't check if bootdelay < 0
	 */
	if (bootdelay >= 0) {
		if (tstc()) {	/* we got a key press	*/
			(void) my_getchar();  /* consume input	*/
			my_puts_P(PSTR("\b\b\b 0"));
			abort = 1;	/* don't auto boot	*/
		}
	}
#endif

	while ((bootdelay > 0) && (!abort)) {
		--bootdelay;
		/* delay 1000 ms */
		ts = get_timer(0);
		do {
			if (tstc()) {	/* we got a key press	*/
				abort  = 1;	/* don't auto boot	*/
				bootdelay = 0;	/* no more delay	*/
				break;
			}
			udelay(10000);
		} while (!abort && get_timer(ts) < 1000);

		printf_P(PSTR("\b\b\b%2d "), bootdelay);
	}

	putchar('\n');

	return abort;
}

const char *bootdelay_process(void)
{
	char *s;
	int bootdelay;

	s = getenv("bootdelay");
	bootdelay = s ? atoi(s) : CONFIG_BOOTDELAY;


	debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
	_delay_ms(20);

	s = getenv("bootcmd");
	stored_bootdelay = bootdelay;
	return s;
}

void autoboot_command(const char *s)
{
	debug("### main_loop: bootcmd=\"%s\"\n", s ? s : PSTR("<UNDEFINED>"));
	_delay_ms(20);

	if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
		run_command_list(s, -1);
	}
}


void main_loop(void)
{
	const char *s;

	s = bootdelay_process();
	autoboot_command(s);
	cli_loop();
}

int main(void)
{
	setup_avr();
	z80_setup_bus();
	
	serial_setup();
	sei();
	
	if (env_check() == 0)
		set_default_env();
	env_init();

	printf_P(PSTR("\n(ATMEGA1281+HD64180)_stamp Tester\n"));
	
	main_loop();
}