/*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#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 "i2c.h"
#include "con-utils.h"
#include "serial.h"
#include "timer.h"
#include "cli.h"
#include "env.h"
+#include "z180-serv.h"
+#include "gpio.h"
+#include "time.h"
+#include "rtc.h"
+
+static uint8_t mcusr;
/*--------------------------------------------------------------------------*/
#if DEBUG
-void preset_ram (void) __attribute__ ((naked)) \
- __attribute__ ((section (".init3")));
-void
-preset_ram (void)
+
+__attribute__ ((naked)) __attribute__ ((section (".init3")))
+void preset_ram (void)
{
for (uint8_t *p = RAMSTART; p <= (uint8_t *) RAMEND; p++)
*p = 0xdd;
}
+
+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): %s"), r ? "" : "none");
+ for ( ; r; p++, r >>= 1) {
+ if (r & 1) {
+ my_puts_P(*p);
+ if (r & ~1)
+ printf_P(PSTR(", "));
+ }
+ }
+ printf_P(PSTR(".\n"));
+}
+
#endif
-/*--------------------------------------------------------------------------*/
-static uint8_t mcusr;
+ISR(INT5_vect)
+{
+ Stat |= S_MSG_PENDING;
+}
+
+ISR(INT6_vect)
+{
+ Stat |= S_CON_PENDING;
+}
static
void setup_avr(void)
{
/* save and clear reset reason(s) */
+ /* TODO: move to init section? */
mcusr = MCUSR;
MCUSR = 0;
-
+
/* WD */
/* CPU */
MCUCR = _BV(JTD);
MCUCR = _BV(JTD);
- /* disable unused periphels */
- PRR0 = _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRADC);
- PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) |
+ /* Disable peripherals. Enable individually in respective init function. */
+ PRR0 = _BV(PRTWI) |
+ _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRTIM1) |
+ _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC);
+
+ PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) |
_BV(PRUSART3) | _BV(PRUSART2) | _BV(PRUSART1);
+
/* disable analog comparator */
ACSR = _BV(ACD);
/* Ports */
CLKPR = 0;
/* Timer */
-
- OCR1A = F_CPU / 8 / 1000 - 1; // Timer1: 1000Hz interval (OC1A)
- TCCR1B = 0b00001010;
- TIMSK1 = _BV(OCIE1A); // Enable TC1.oca interrupt
+ PRR1 &= ~_BV(PRTIM3);
+ OCR3A = F_CPU / 1000 - 1; /* Timer3: 1000Hz interval (OC3A) */
+ TCCR3B = (0b01<<WGM32)|(0b001<<CS30); /* CTC Mode, Prescaler 1 */
+ TIMSK3 = _BV(OCIE3A); /* Enable TC2.oca interrupt */
+
+ /* INT5, INT6: falling edge */
+ EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) |
+ (0b10 << ISC50) | (0b10 << ISC60);
+ /* Reset pending ints */
+ EIFR |= _BV(INTF5) | _BV(INTF6);
+ /* Enable INT5, and INT6 */
+ EIMSK |= _BV(INT5) | _BV(INT6);
}
-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)
+int reset_reason_is_power_on(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"));
+ return (mcusr & _BV(PORF)) != 0;
}
+static
+void setup_system_time(void)
+{
+ struct tm rtc_time;
-/*******************************************************************************/
-
-#define udelay(n) _delay_us(n)
+ rtc_get(&rtc_time);
+ rtc_time.tm_isdst = 0;
+ set_system_time(mk_gmtime(&rtc_time) );
+}
+/*--------------------------------------------------------------------------*/
/* 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
+ * returns: 0 - no key, allow autoboot
* 1 - got key, abort
*/
*/
if (bootdelay >= 0) {
if (tstc()) { /* we got a key press */
- (void) my_getchar(); /* consume input */
+ (void) my_getchar(1); /* consume input */
my_puts_P(PSTR("\b\b\b 0"));
abort = 1; /* don't auto boot */
}
char *s;
int bootdelay;
- s = getenv("bootdelay");
- bootdelay = s ? atoi(s) : CONFIG_BOOTDELAY;
+ bootdelay = (int) getenv_ulong(PSTR(ENV_BOOTDELAY), 10, CONFIG_BOOTDELAY);
debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
_delay_ms(20);
- s = getenv("bootcmd");
+ s = getenv(PSTR(ENV_BOOTCMD));
stored_bootdelay = bootdelay;
return s;
}
int main(void)
{
+ extern void setup_mmc(void);
+ for (int i = 0; i < GPIO_MAX; i++)
+ gpio_config(i, INPUT_PULLUP);
setup_avr();
+ setup_mmc();
z80_setup_bus();
-
- serial_setup();
+ env_init();
+
+ if (reset_reason_is_power_on())
+ _delay_ms(CONFIG_PWRON_DELAY);
+
+ serial_setup(getenv_ulong(PSTR(ENV_BAUDRATE), 10, CONFIG_BAUDRATE));
sei();
#if DEBUG
debug("\n=========================< (RE)START DEBUG >=========================\n");
print_reset_reason();
#endif
-
- env_init();
- printf_P(PSTR("\n(ATMEGA1281+HD64180)_stamp Tester\n"));
-
+#if DEBUG
+ unsigned long i_speed = getenv_ulong(PSTR("i2c_clock"), 10, CONFIG_SYS_I2C_CLOCK);
+ debug("### Setting I2C clock Frequency to %lu Hz.\n", i_speed);
+ i2c_init(i_speed);
+#else
+ i2c_init(CONFIG_SYS_I2C_CLOCK);
+#endif
+ setup_system_time();
+
+ printf_P(PSTR("\nATMEGA1281+Z8S180 Stamp Monitor\n\n"));
+
+ setup_z180_serv();
+
main_loop();
}
projects / z180-stamp.git / blobdiff