/*
+ * (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 <avr/wdt.h>
#include <stdlib.h>
-#include <stdio.h>
-
#include "config.h"
-#include "debug.h"
+#include "ff.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"
+#include "debug.h"
+
+uint8_t mcusr __attribute__ ((section (".noinit")));
+
+#if DEBUG
+__attribute__ ((naked)) __attribute__ ((section (".init3")))
+void preset_ram (void)
+{
+ for (uint8_t *p = (uint8_t *) RAMSTART; p <= (uint8_t *) RAMEND; p++)
+ *p = 0xdd;
+
+}
+#endif
+
+__attribute__ ((naked)) __attribute__ ((section (".init3")))
+void get_mcusr (void)
+{
+ /* save and clear reset reason(s) */
+ /* TODO: move to init section? */
+ mcusr = MCUSR;
+ MCUSR = 0;
+
+ wdt_disable();
+}
/*--------------------------------------------------------------------------*/
+#if DEBUG
+
+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"));
+}
-void setup_avr(void)
+#endif
+
+ISR(INT5_vect)
{
- /* WD */
+ Stat |= S_MSG_PENDING;
+}
+ISR(INT6_vect)
+{
+ Stat |= S_CON_PENDING;
+}
+
+static
+void setup_avr(void)
+{
/* 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) |
+ /* 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 */
+ PRR1 &= ~_BV(PRTIM4);
+ OCR4A = F_CPU / 1000 - 1; /* Timer4: 1000Hz interval */
+ TCCR4B = (0b00<<WGM42)|(0b001<<CS40); /* Normal Mode, Prescaler 1 */
+ TIMSK4 = _BV(OCIE4A); /* Enable Output Compare A 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
+int reset_reason_is_power_on(void)
+{
+ return (mcusr & _BV(PORF)) != 0;
+}
+
+static
+void setup_system_time(void)
+{
+ struct tm rtc_time;
- OCR1A = F_CPU / 8 / 1000 - 1; // Timer1: 1000Hz interval (OC1A)
- TCCR1B = 0b00001010;
- TIMSK1 = _BV(OCIE1A); // Enable TC1.oca interrupt
+ rtc_get(&rtc_time);
+ rtc_time.tm_isdst = 0;
+ set_system_time(mk_gmtime(&rtc_time) );
}
-/*******************************************************************************/
-/*******************************************************************************/
+static void setup_fatfs(void)
+{
+ static FATFS FatFs0;
+ static FATFS FatFs1;
-#define udelay(n) _delay_us(n)
+ f_mount(&FatFs0, "0:", 0);
+ f_mount(&FatFs1, "1:", 0);
+}
+/*--------------------------------------------------------------------------*/
/* 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 */
}
return abort;
}
+static
const char *bootdelay_process(void)
{
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_str(PSTR(ENV_BOOTCMD));
stored_bootdelay = bootdelay;
return s;
}
+static
void autoboot_command(const char *s)
{
- debug("### main_loop: bootcmd=\"%s\"\n", s ? s : PSTR("<UNDEFINED>"));
+ debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
_delay_ms(20);
if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
}
+static
void main_loop(void)
{
const char *s;
int main(void)
{
+ extern void setup_mmc(void);
+
setup_avr();
+ for (int i = 0; i < GPIO_MAX; i++)
+ gpio_config(i, INPUT_PULLUP);
+ setup_mmc();
+ env_init();
z80_setup_bus();
-
- serial_setup();
+
+ 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");
-
- env_init();
+ print_reset_reason();
+#endif
+
+ i2c_init(CONFIG_SYS_I2C_CLOCK);
+ setup_system_time();
+ setup_fatfs();
+
+ printf_P(PSTR("\n" MCU_STRING "+Z8S180 Stamp Monitor - Version: " VERSION " \n\n"));
+
+ setup_z180_serv();
- printf_P(PSTR("\n(ATMEGA1281+HD64180)_stamp Tester\n"));
-
main_loop();
}
projects / z180-stamp.git / blobdiff