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/*
*/
#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"
/*--------------------------------------------------------------------------*/
static uint8_t mcusr;
static
void setup_avr(void)
{
/* save and clear reset reason(s) */
mcusr = MCUSR;
MCUSR = 0;
/* 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
}
static const FLASH char * const FLASH rreasons[] = {
FSTR("Power on"),
FSTR("External"),
FSTR("Brown out"),
FSTR("Watchdog"),
FSTR("JTAG"),
};
static
void print_reset_reason(void)
{
uint8_t r = mcusr & 0x1f;
const FLASH char * const FLASH *p = rreasons;
printf_P(PSTR("Reset reason(s): "));
for ( ; r; p++, r >>= 1) {
if (r & 1) {
my_puts_P(*p);
if (r & ~1)
printf_P(PSTR(", "));
}
}
printf_P(PSTR(".\n"));
}
/*******************************************************************************/
/*******************************************************************************/
#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;
}
static
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;
}
static
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);
}
}
static
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();
debug("\n=========================< (RE)START DEBUG >=========================\n");
#if DEBUG
print_reset_reason();
#endif
env_init();
printf_P(PSTR("\n(ATMEGA1281+HD64180)_stamp Tester\n"));
main_loop();
}
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